GNU Astronomy Utilities

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Index: Macros, structures and functions

All Gnuastro library’s exported macros start with GAL_, and its exported structures and functions start with gal_. This abbreviation stands for GNU Astronomy Library. The next element in the name is the name of the header which declares or defines them, so to use the gal_array_fset_const function, you have to #include <gnuastro/array.h>. See Gnuastro library for more. The pthread_barrier constructs are our implementation and are only available on systems that don’t have them, see Implementation of pthread_barrier.

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Index Entry  Section

gal_arithmetic: Arithmetic on datasets
GAL_ARITHMETIC_FLAGS_ALL: Arithmetic on datasets
GAL_ARITHMETIC_FREE: Arithmetic on datasets
GAL_ARITHMETIC_INPLACE: Arithmetic on datasets
GAL_ARITHMETIC_NUMOK: Arithmetic on datasets
GAL_ARITHMETIC_OP_ABS: Arithmetic on datasets
GAL_ARITHMETIC_OP_AND: Arithmetic on datasets
GAL_ARITHMETIC_OP_BITAND: Arithmetic on datasets
GAL_ARITHMETIC_OP_BITLSH: Arithmetic on datasets
GAL_ARITHMETIC_OP_BITNOT: Arithmetic on datasets
GAL_ARITHMETIC_OP_BITOR: Arithmetic on datasets
GAL_ARITHMETIC_OP_BITRSH: Arithmetic on datasets
GAL_ARITHMETIC_OP_BITXOR: Arithmetic on datasets
GAL_ARITHMETIC_OP_DIVIDE: Arithmetic on datasets
GAL_ARITHMETIC_OP_EQ: Arithmetic on datasets
GAL_ARITHMETIC_OP_GE: Arithmetic on datasets
GAL_ARITHMETIC_OP_GT: Arithmetic on datasets
GAL_ARITHMETIC_OP_ISBLANK: Arithmetic on datasets
GAL_ARITHMETIC_OP_LE: Arithmetic on datasets
GAL_ARITHMETIC_OP_LOG: Arithmetic on datasets
GAL_ARITHMETIC_OP_LOG10: Arithmetic on datasets
GAL_ARITHMETIC_OP_LT: Arithmetic on datasets
GAL_ARITHMETIC_OP_MAX: Arithmetic on datasets
GAL_ARITHMETIC_OP_MAXVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_MEAN: Arithmetic on datasets
GAL_ARITHMETIC_OP_MEANVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_MEDIAN: Arithmetic on datasets
GAL_ARITHMETIC_OP_MEDIANVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_MIN: Arithmetic on datasets
GAL_ARITHMETIC_OP_MINUS: Arithmetic on datasets
GAL_ARITHMETIC_OP_MINVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_MODULO: Arithmetic on datasets
GAL_ARITHMETIC_OP_MULTIPLY: Arithmetic on datasets
GAL_ARITHMETIC_OP_NE: Arithmetic on datasets
GAL_ARITHMETIC_OP_NOT: Arithmetic on datasets
GAL_ARITHMETIC_OP_NUM: Arithmetic on datasets
GAL_ARITHMETIC_OP_NUMVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_OR: Arithmetic on datasets
GAL_ARITHMETIC_OP_PLUS: Arithmetic on datasets
GAL_ARITHMETIC_OP_POW: Arithmetic on datasets
GAL_ARITHMETIC_OP_SQRT: Arithmetic on datasets
GAL_ARITHMETIC_OP_STD: Arithmetic on datasets
GAL_ARITHMETIC_OP_STDVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_SUM: Arithmetic on datasets
GAL_ARITHMETIC_OP_SUMVAL: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_FLOAT32: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_FLOAT64: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_INT16: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_INT32: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_INT64: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_INT8: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_UINT16: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_UINT32: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_UINT64: Arithmetic on datasets
GAL_ARITHMETIC_OP_TO_UINT8: Arithmetic on datasets
GAL_ARITHMETIC_OP_WHERE: Arithmetic on datasets
gal_binary_connected_adjacency_matrix: Binary datasets
gal_binary_connected_components: Binary datasets
gal_binary_dilate: Binary datasets
gal_binary_erode: Binary datasets
gal_binary_fill_holes: Binary datasets
gal_binary_open: Binary datasets
GAL_BINARY_TMP_VALUE: Binary datasets
gal_blank_alloc_write: Library blank values
gal_blank_as_string: Library blank values
gal_blank_flag: Library blank values
GAL_BLANK_FLOAT32: Library blank values
GAL_BLANK_FLOAT64: Library blank values
gal_blank_initialize: Library blank values
GAL_BLANK_INT16: Library blank values
GAL_BLANK_INT32: Library blank values
GAL_BLANK_INT64: Library blank values
GAL_BLANK_INT8: Library blank values
gal_blank_present: Library blank values
gal_blank_remove: Library blank values
GAL_BLANK_SIZE_T: Library blank values
GAL_BLANK_STRING: Library blank values
GAL_BLANK_UINT16: Library blank values
GAL_BLANK_UINT32: Library blank values
GAL_BLANK_UINT64: Library blank values
GAL_BLANK_UINT8: Library blank values
gal_blank_write: Library blank values
gal_box_border_from_center: Bounding box
gal_box_bound_ellipse: Bounding box
gal_box_overlap: Bounding box
GAL_CONFIG_BIN_OP_FLOAT32: Configuration information
GAL_CONFIG_BIN_OP_FLOAT64: Configuration information
GAL_CONFIG_BIN_OP_INT16: Configuration information
GAL_CONFIG_BIN_OP_INT32: Configuration information
GAL_CONFIG_BIN_OP_INT64: Configuration information
GAL_CONFIG_BIN_OP_INT8: Configuration information
GAL_CONFIG_BIN_OP_UINT16: Configuration information
GAL_CONFIG_BIN_OP_UINT32: Configuration information
GAL_CONFIG_BIN_OP_UINT64: Configuration information
GAL_CONFIG_BIN_OP_UINT8: Configuration information
GAL_CONFIG_HAVE_LIBGIT2: Configuration information
GAL_CONFIG_HAVE_PTHREAD_BARRIER: Configuration information
GAL_CONFIG_HAVE_WCSLIB_VERSION: Configuration information
GAL_CONFIG_SIZEOF_LONG: Configuration information
GAL_CONFIG_SIZEOF_SIZE_T: Configuration information
GAL_CONFIG_VERSION: Configuration information
gal_convolve_spatial: Convolution functions
gal_convolve_spatial_correct_ch_edge: Convolution functions
gal_data_alloc: Dataset size and allocation
gal_data_array_calloc: Arrays of datasets
gal_data_array_free: Arrays of datasets
gal_data_calloc_array: Dataset size and allocation
gal_data_copy: Copying datasets
gal_data_copy_string_to_number: Copying datasets
gal_data_copy_to_allocated: Copying datasets
gal_data_copy_to_new_type: Copying datasets
gal_data_copy_to_new_type_free: Copying datasets
gal_data_dsize_is_different: Dataset size and allocation
gal_data_free: Dataset size and allocation
gal_data_free_contents: Dataset size and allocation
gal_data_initialize: Dataset size and allocation
gal_data_malloc_array: Dataset size and allocation
gal_data_ptr_dist: Dataset size and allocation
gal_data_ptr_increment: Dataset size and allocation
gal_dimension_add_coords: Dimensions
gal_dimension_coord_to_index: Dimensions
gal_dimension_dist_manhattan: Dimensions
gal_dimension_increment: Dimensions
gal_dimension_index_to_coord: Dimensions
gal_dimension_num_neighbors: Dimensions
gal_dimension_total_size: Dimensions
gal_fits_bitpix_to_type: CFITSIO and Gnuastro types
gal_fits_datatype_to_type: CFITSIO and Gnuastro types
gal_fits_hdu_format: FITS HDUs
gal_fits_hdu_num: FITS HDUs
gal_fits_hdu_open: FITS HDUs
gal_fits_hdu_open_format: FITS HDUs
gal_fits_img_info: FITS arrays
gal_fits_img_read: FITS arrays
gal_fits_img_read_kernel: FITS arrays
gal_fits_img_read_to_type: FITS arrays
gal_fits_img_write: FITS arrays
gal_fits_img_write_corr_wcs_str: FITS arrays
gal_fits_img_write_to_ptr: FITS arrays
gal_fits_img_write_to_type: FITS arrays
gal_fits_io_error: FITS macros errors filenames
gal_fits_key_clean_str_value: FITS header keywords
gal_fits_key_list_add: FITS header keywords
gal_fits_key_list_add_end: FITS header keywords
gal_fits_key_read: FITS header keywords
gal_fits_key_read_from_ptr: FITS header keywords
gal_fits_key_write: FITS header keywords
gal_fits_key_write_filename: FITS header keywords
gal_fits_key_write_version: FITS header keywords
gal_fits_key_write_wcsstr: FITS header keywords
GAL_FITS_MAX_NDIM: FITS macros errors filenames
gal_fits_name_is_fits: FITS macros errors filenames
gal_fits_name_save_as_string: FITS macros errors filenames
gal_fits_open_to_write: FITS HDUs
gal_fits_suffix_is_fits: FITS macros errors filenames
gal_fits_tab_format: FITS tables
gal_fits_tab_info: FITS tables
gal_fits_tab_read: FITS tables
gal_fits_tab_size: FITS tables
gal_fits_tab_write: FITS tables
gal_fits_type_to_bin_tform: CFITSIO and Gnuastro types
gal_fits_type_to_bitpix: CFITSIO and Gnuastro types
gal_fits_type_to_datatype: CFITSIO and Gnuastro types
gal_git_describe: Git wrappers
gal_interpolate_close_neighbors: Interpolation
gal_list_data_add: List of gal_data_t
gal_list_data_add_alloc: List of gal_data_t
gal_list_data_free: List of gal_data_t
gal_list_data_number: List of gal_data_t
gal_list_data_pop: List of gal_data_t
gal_list_data_reverse: List of gal_data_t
gal_list_dosizet_add: Doubly linked ordered list of size_t
gal_list_dosizet_free: Doubly linked ordered list of size_t
gal_list_dosizet_pop_smallest: Doubly linked ordered list of size_t
gal_list_dosizet_print: Doubly linked ordered list of size_t
gal_list_dosizet_to_sizet: Doubly linked ordered list of size_t
gal_list_f32_add: List of float
gal_list_f32_free: List of float
gal_list_f32_number: List of float
gal_list_f32_pop: List of float
gal_list_f32_print: List of float
gal_list_f32_reverse: List of float
gal_list_f32_to_array: List of float
gal_list_f64_add: List of double
gal_list_f64_free: List of double
gal_list_f64_number: List of double
gal_list_f64_pop: List of double
gal_list_f64_print: List of double
gal_list_f64_reverse: List of double
gal_list_f64_to_array: List of double
gal_list_i32_add: List of int32_t
gal_list_i32_free: List of int32_t
gal_list_i32_number: List of int32_t
gal_list_i32_pop: List of int32_t
gal_list_i32_print: List of int32_t
gal_list_i32_reverse: List of int32_t
gal_list_i32_to_array: List of int32_t
gal_list_osizet_add: Ordered list of size_t
gal_list_osizet_pop: Ordered list of size_t
gal_list_osizet_to_sizet_free: Ordered list of size_t
gal_list_sizet_add: List of size_t
gal_list_sizet_free: List of size_t
gal_list_sizet_number: List of size_t
gal_list_sizet_pop: List of size_t
gal_list_sizet_print: List of size_t
gal_list_sizet_reverse: List of size_t
gal_list_sizet_to_array: List of size_t
gal_list_str_add: List of strings
gal_list_str_free: List of strings
gal_list_str_number: List of strings
gal_list_str_pop: List of strings
gal_list_str_print: List of strings
gal_list_str_reverse: List of strings
gal_list_void_add: List of void
gal_list_void_free: List of void
gal_list_void_number: List of void
gal_list_void_pop: List of void
gal_list_void_reverse: List of void
gal_permutation_apply: Permutations
gal_permutation_apply_inverse: Permutations
gal_permutation_check: Permutations
gal_polygon_area: Polygons
gal_polygon_clip: Polygons
gal_polygon_ordered_corners: Polygons
gal_polygon_pin: Polygons
gal_polygon_ppropin: Polygons
gal_qsort_index_arr: Qsort functions
gal_qsort_index_float_decreasing: Qsort functions
gal_qsort_TYPE_decreasing: Qsort functions
gal_qsort_TYPE_increasing: Qsort functions
GAL_STATISTICS_BINS_INVALID: Statistical operations
GAL_STATISTICS_BINS_REGULAR: Statistical operations
gal_statistics_cfp: Statistical operations
gal_statistics_histogram: Statistical operations
gal_statistics_is_sorted: Statistical operations
gal_statistics_maximum: Statistical operations
gal_statistics_mean: Statistical operations
gal_statistics_mean_std: Statistical operations
gal_statistics_median: Statistical operations
gal_statistics_minimum: Statistical operations
gal_statistics_mode: Statistical operations
GAL_STATISTICS_MODE_GOOD_SYM: Statistical operations
gal_statistics_mode_mirror_plots: Statistical operations
gal_statistics_no_blank_sorted: Statistical operations
gal_statistics_number: Statistical operations
gal_statistics_quantile: Statistical operations
gal_statistics_quantile_function: Statistical operations
gal_statistics_quantile_function_index: Statistical operations
gal_statistics_quantile_index: Statistical operations
gal_statistics_regular_bins: Statistical operations
gal_statistics_sigma_clip: Statistical operations
GAL_STATISTICS_SORTED_NOT: Statistical operations
gal_statistics_sort_decreasing: Statistical operations
gal_statistics_sort_increasing: Statistical operations
gal_statistics_std: Statistical operations
gal_statistics_sum: Statistical operations
gal_table_comments_add_intro: Table input output
GAL_TABLE_DEF_WIDTH_DBL: Table input output
GAL_TABLE_DEF_WIDTH_FLT: Table input output
GAL_TABLE_DEF_WIDTH_INT: Table input output
GAL_TABLE_DEF_WIDTH_LINT: Table input output
GAL_TABLE_DEF_WIDTH_STR: Table input output
GAL_TABLE_DISPLAY_FMT_EXP: Table input output
GAL_TABLE_DISPLAY_FMT_HEX: Table input output
GAL_TABLE_FORMAT_AFITS: Table input output
GAL_TABLE_FORMAT_BFITS: Table input output
GAL_TABLE_FORMAT_INVALID: Table input output
GAL_TABLE_FORMAT_TXT: Table input output
gal_table_info: Table input output
gal_table_print_info: Table input output
gal_table_read: Table input output
GAL_TABLE_SEARCH_COMMENT: Table input output
GAL_TABLE_SEARCH_INVALID: Table input output
GAL_TABLE_SEARCH_NAME: Table input output
GAL_TABLE_SEARCH_UNIT: Table input output
gal_table_write: Table input output
gal_table_write_log: Table input output
gal_threads_attr_barrier_init: Gnuastro's thread related functions
gal_threads_dist_in_threads: Gnuastro's thread related functions
gal_threads_number: Gnuastro's thread related functions
gal_threads_spin_off: Gnuastro's thread related functions
gal_tile_block: Independent tiles
gal_tile_block_blank_flag: Independent tiles
gal_tile_block_check_tiles: Independent tiles
gal_tile_block_increment: Independent tiles
gal_tile_block_relative_to_other: Independent tiles
gal_tile_block_write_const_value: Independent tiles
gal_tile_full: Tile grid
gal_tile_full_free_contents: Tile grid
gal_tile_full_id_from_coord: Tile grid
gal_tile_full_permutation: Tile grid
gal_tile_full_sanity_check: Tile grid
gal_tile_full_two_layers: Tile grid
gal_tile_full_values_smooth: Tile grid
gal_tile_full_values_write: Tile grid
GAL_TILE_PARSE_OPERATE: Independent tiles
gal_tile_series_from_minmax: Independent tiles
gal_tile_start_coord: Independent tiles
gal_tile_start_end_coord: Independent tiles
gal_tile_start_end_ind_inclusive: Independent tiles
gal_txt_image_read: Text files
gal_txt_line_stat: Text files
gal_txt_table_info: Text files
gal_txt_table_read: Text files
gal_txt_write: Text files
GAL_TYPE_BIT: Library data types
gal_type_bit_string: Library data types
GAL_TYPE_COMPLEX32: Library data types
GAL_TYPE_COMPLEX64: Library data types
GAL_TYPE_FLOAT32: Library data types
GAL_TYPE_FLOAT64: Library data types
gal_type_from_name: Library data types
gal_type_from_string: Library data types
GAL_TYPE_INT16: Library data types
GAL_TYPE_INT32: Library data types
GAL_TYPE_INT64: Library data types
GAL_TYPE_INT8: Library data types
GAL_TYPE_INVALID: Library data types
gal_type_is_list: Library data types
GAL_TYPE_LONG: Library data types
gal_type_max: Library data types
gal_type_min: Library data types
gal_type_name: Library data types
gal_type_out: Library data types
gal_type_sizeof: Library data types
GAL_TYPE_SIZE_T: Library data types
GAL_TYPE_STRING: Library data types
gal_type_string_to_number: Library data types
GAL_TYPE_STRLL: Library data types
gal_type_to_string: Library data types
GAL_TYPE_UINT16: Library data types
GAL_TYPE_UINT32: Library data types
GAL_TYPE_UINT64: Library data types
GAL_TYPE_UINT8: Library data types
gal_wcs_angular_distance_deg: World Coordinate System
gal_wcs_copy: World Coordinate System
gal_wcs_decompose_pc_cdelt: World Coordinate System
gal_wcs_img_to_world: World Coordinate System
gal_wcs_on_tile: World Coordinate System
gal_wcs_pixel_area_arcsec2: World Coordinate System
gal_wcs_pixel_scale: World Coordinate System
gal_wcs_read: World Coordinate System
gal_wcs_read_fitsptr: World Coordinate System
gal_wcs_warp_matrix: World Coordinate System
gal_wcs_world_to_img: World Coordinate System

pthread_barrierattr_t: Implementation of pthread_barrier
pthread_barrier_destroy: Implementation of pthread_barrier
pthread_barrier_init: Implementation of pthread_barrier
pthread_barrier_t: Implementation of pthread_barrier
pthread_barrier_wait: Implementation of pthread_barrier

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Index Entry  Section

$HOME: Current directory and User wide
$HOME/.local/etc/: Current directory and User wide

--: Operating mode options
--cite: Operating mode options
--config=STR: Operating mode options
--disable-guide-message: Gnuastro configure options
--disable-progname: Gnuastro configure options
--dontdelete: Input output options
--enable-bin-op-alltypes: Gnuastro configure options
--enable-bin-op-float32: Gnuastro configure options
--enable-bin-op-float64: Gnuastro configure options
--enable-bin-op-int16: Gnuastro configure options
--enable-bin-op-int32: Gnuastro configure options
--enable-bin-op-int64: Gnuastro configure options
--enable-bin-op-int8: Gnuastro configure options
--enable-bin-op-uint16: Gnuastro configure options
--enable-bin-op-uint32: Gnuastro configure options
--enable-bin-op-uint64: Gnuastro configure options
--enable-bin-op-uint8: Gnuastro configure options
--enable-gnulibcheck: Gnuastro configure options
--enable-gnulibcheck: Known issues
--enable-guide-message=no: Gnuastro configure options
--enable-progname: Gnuastro configure options
--enable-progname=no: Gnuastro configure options
--enable-reentrant: CFITSIO
--hdu=STR/INT: Input output options
--help: Arguments and options
--help: Operating mode options
--help: --help
--help output customization: --help
--ignorecase: Input output options
--keepinputdir: Input output options
--keepinputdir: Automatic output
--lastconfig: Operating mode options
--log: Operating mode options
--numthreads: Configuration files
--numthreads: Multi-threaded operations
--numthreads=INT: Operating mode options
--onlyversion=STR: Operating mode options
--output: Configuration files
--output=STR: Input output options
--prefix: Installation directory
--printparams: Options
--printparams: Operating mode options
--program-prefix: Executable names
--program-suffix: Executable names
--program-transform-name: Executable names
--quiet: Operating mode options
--searchin=STR: Input output options
--setdirconf: Operating mode options
--setdirconf: Current directory and User wide
--setusrconf: Operating mode options
--setusrconf: Current directory and User wide
--tableformat=STR: Input output options
--type=STR: Input output options
--usage: Arguments and options
--usage: Operating mode options
--usage: --usage
--version: Operating mode options
--without-pgplot: WCSLIB
-?: Operating mode options
-D: Input output options
-h STR/INT: Input output options
-I: Input output options
-K: Input output options
-mecube (ds9): Viewing multiextension FITS images
-N INT: Operating mode options
-o STR: Input output options
-P: Operating mode options
-q: Operating mode options
-S: Operating mode options
-s STR: Input output options
-T STR: Input output options
-t STR: Input output options
-U: Operating mode options
-V: Operating mode options

./.gnuastro/: Current directory and User wide
./configure: Configuring
./configure: Installation directory
./configure options: Gnuastro configure options
.bashrc: --help
.bashrc: Generating random numbers
.desktop: Viewing multiextension FITS images

32-bit: Configuration information

64-bit: Configuration information

A4 paper size: A4 print book
A4 print book: A4 print book
ACS: Warp
Additions to Gnuastro: Suggest new feature
Adjacency matrix: Binary datasets
Adobe systems: Recognized file formats
ADU: Flux Brightness and magnitude
ADU: Instrumental noise
Advanced camera for surveys: Warp
Advanced Camera for Surveys: Warping basics
Affine Transformation: Warping basics
Albert. A. Michelson: Science and its tools
Amplifier: Tessellation
Announcements: Announcements
Anonymous bug submission: Report a bug
Anscombe F. J.: Science and its tools
Anscombe’s quartet: Science and its tools
Aperture blurring: Sigma clipping
Aperture photometry: MakeCatalog
Aperture photometry: Invoking astmkcatalog
Argp argument parser: --help
Argp argument parser: Mandatory source code files
args.h: Mandatory source code files
Arguments to programs: Arguments and options
Array: Linked lists
ASCII plot: Invoking aststatistics
ASCII table, FITS: Recognized table formats
ASCII85 encoding: Invoking astconvertt
astprogname: Naming convention
Astronomical data format: Recognized file formats
Astronomical data suffixes: Arguments
Astronomical Magnitude system: Flux Brightness and magnitude
Asynchronous thread allocation: Hubble visually checks and classifies his catalog
Asynchronous thread allocation: Invoking astcrop
Atmosphere: Convolve
Atmosphere blurring: Sigma clipping
authors-cite.h: Mandatory source code files
Auto-complete in the shell: Executable names
Automatic configuration file writing: Configuration file format
Automatic output file names: Automatic output
Automatically created build files: Bootstrapping
Available number of threads: Multi-threaded operations
Average: Statistical operations
Average, weighted: Convolve
AWK: Table
AWK: Invoking asttable
AWK: Invoking astarithmetic
AWK: Invoking aststatistics
AWK: Table input output
Axis ratio: Defining an ellipse

Background flux: Sky value definition
Background flux: Photon counting noise
Background flux gradients: Photon counting noise
Background pixels: Detection options
Backup: Configure and build in RAM
Best use of CPU threads: A note on threads
Bi-linear interpolation: Resampling
Bias current: Tessellation
Bicubic interpolation: Resampling
Bin width, histogram: Histogram and Cumulative Frequency Plot
Binary datasets: Binary datasets
Binary image: Recognized file formats
Binary image: Detection options
Binary table, FITS: Recognized table formats
Bit: Numeric data types
bit-32: Configuration information
bit-64: Configuration information
Bitwise Or: Arithmetic on datasets
Black and white image: Recognized file formats
blank color channel: Recognized file formats
Blank data: Generic data container
Blank pixel: Blank pixels
Blank pixel: Arithmetic operators
Blur image: Convolve
Blur image: PSF
Blurring: Sigma clipping
Book formats: Getting help
Bootstrapping: Bootstrapping
Border on an image: Invoking astconvertt
Breadth first search: Defining an ellipse
Breadth first search: Binary datasets
Brightness: Galaxies
Brightness: Flux Brightness and magnitude
Brightness: Profile magnitude
Buffers (Emacs): Coding conventions
Bug: Report a bug
Bug: Gnuastro project webpage
Bug reporting: Report a bug
Bug tracker: Report a bug Report a bug
Build: Quick start
Build individual profiles: MakeProfiles output dataset
Build tree: Test scripts
Building from source: Mandatory dependencies
Byte: Numeric data types

C Pre-Processor: Invoking astbuildprog
C programming language: Why C
C++ programming language: Why C
C, plotting: PGPLOT
C99: Dataset size and allocation
C: restrict: Generic data container
Cache, system: A note on threads
Camera: Resampling
CANDELS: Quantifying measurement limits
CCD: Tessellation
CCD: Warp
Central management: Gnuastro project webpage
CFITSIO version on outputs: Output headers
Change converted pixel values: Invoking astconvertt
Channel: Tessellation
Charge-coupled device: Warp
Check: Quick start
Check center of crop: Crop options
Checking detection algorithms: MakeProfiles
Checking tests: Tests
Citation information: Mandatory source code files
CLI: command-line user interface: Command-line interface
CLI: repeating operations: Command-line interface
Clump magnitude limit: Quantifying measurement limits
CMYK: Color
Colorspace: Color
Colorspace, gray-scale: Color
Colorspace, transformation: Color
Command-line arguments: Arguments and options
Command-line help: Getting help
Command-line options: Arguments and options
Command-line scroll: --help
Command-line searching text: --help
Command-line token separation: Command-line
Command-line user interface: Command-line interface
Command-line, long outputs: --help
Command-line, viewing full book: Info
Comments: Sufi simulates a detection
Commutative property: Merging multiple warpings
Comoving distance: Distance on a 2D curved space
Compare Moffat and Gaussian: PSF
Compare Poisson and Gaussian: Photon counting noise
Compile: Quick start
Compiled PostScript: Recognized file formats
Compiling from source: Mandatory dependencies
Completeness: Quantifying measurement limits
Complex numbers: Invoking astconvolve
Compression quality in JPEG: Invoking astconvertt
Configuration file directories: Configuration file precedence
Configuration file format: Configuration file format
Configuration file precedence: Configuration file precedence
Configuration file suffix: Configuration file format
Configuration files: Options
Configuration files: Configuration files
Configuration files, system wide: System wide
Configuration files, writing: Configuration file format
Configuration, not finding library: Known issues
Configure options: Configuring
Configure options particular to Gnuastro: Gnuastro configure options
Configuring: Configuring
Connected components: Binary datasets
Connectivity: Binary datasets
Convenient book formats: Getting help
Convention for program source: Program source
Converting data formats: ConvertType
Converting image formats: ConvertType
ConvertType (astconvertt): ConvertType
Convex Hull: Polygons
Convolution: Convolve
Convolution: Convolution process
Convolution: PSF
Convolution kernel: FITS arrays
Cookbook: Tutorials
Coordinate transformation: Warping basics
Coordinates, homogeneous: Warping basics
Copyright: Your rights
Correlated noise: Quantifying measurement limits
Correlation: Convolution process
Cosmic ray removal: Sky value definition
Cosmic rays: Convolve
Cosmic rays: Warp
Cosmic rays: Sigma clipping
Cosmic rays: Sky value definition
Cosmic rays: Quantifying signal in a tile
COSMOS survey: Crop
Counting error: Photon counting noise
Counting from zero.: Options
Counts: Flux Brightness and magnitude
Counts: Instrumental noise
CPPFLAGS: Known issues
CPU threads: Multi-threaded operations
CPU threads: MakeProfiles profile settings
CPU threads, number: Configuration files
CPU threads, set number: Operating mode options
CPU, using all threads: Multi-threaded operations
Crop (astcrop): Crop
Crop a given section of image: Crop section syntax
Crop part of image: Crop
Crop section format: Crop section syntax
Cumulative Frequency Plot: Histogram and Cumulative Frequency Plot
Customize --help output: --help
Customize executable names: Executable names
Customizing installation: Configuring

Data: Quantifying signal in a tile
Data format conversion: ConvertType
Data structures: Headers
Data type: Generic data container
Data’s depth: Quantifying measurement limits
Dataset: binary: Binary datasets
de Vaucouleur profile: Galaxies
Debug: Invoking astbuildprog
Debugging: Building and debugging
Default executable search directory: Installation directory
Default library search directory: Installation directory
Default option values: Options
Default option values: Configuration files
Define section to crop: Crop section syntax
Dependencies, Gnuastro: Mandatory dependencies
Depth: Quantifying measurement limits
Detached threads: Gnuastro's thread related functions
Detection: Convolve
Detection: NoiseChisel
Detections false: Quantifying measurement limits
Detector: Resampling
Development packages: Known issues
Diffraction limited: PSF
Dilation: Binary datasets
Directory, install: Installation directory
Discrete Fourier transform: Invoking astconvolve
Distortion, optical: Warp
Distribution mode: Sky value misconceptions
Douglas Rushkoff: Science and its tools
Drizzle: Resampling
Dynamic libraries: Installation directory
Dynamic linking: Linking

Edges, image: Resampling
Edwin Hubble: Hubble visually checks and classifies his catalog
Effective radius: Galaxies
Efficient use of CPU threads: A note on threads
Ellipse: Defining an ellipse
Elliptical distance: Defining an ellipse
Elliptical galaxies: Hubble visually checks and classifies his catalog
Emacs buffers: Coding conventions
Encapsulated PostScript: Recognized file formats
Environment: Installation directory
Environment variable, HOME: Installation directory
Environment variables: Installation directory
Environment variables: Installation directory
Environment variables: Generating random numbers
eog: Hubble visually checks and classifies his catalog
EPS: Recognized file formats
Erosion: NoiseChisel
Erosion: Detection options
Erosion: Binary datasets
Error, floating point round-off: Invoking astconvolve
etc: Configuration files
Exact area resampling: Resampling
Executable names: Executable names
Eye of GNOME: Hubble visually checks and classifies his catalog

False detections: Quantifying measurement limits
Feature request: Gnuastro project webpage
Feature requests: Suggest new feature
File I/O: Configure and build in RAM
File operations: Data containers
File system Hierarchy Standard: Configuration files
file systems, tmpfs: Configure and build in RAM
first-in-first-out: Linked lists
first-in-first-out: FITS header keywords
FITS: FITS files
FITS image viewer: SAO ds9
FITS standard: CFITSIO
FITS standard: Invoking astwarp
FITS standard: Generic data container
FITS Tables: Recognized table formats
Fitting: Modeling and fittings
Flip coordinates: Warping basics
Floating point error: Measuring elliptical parameters
Floating point round-off error: Invoking astconvolve
FLT: Options
Flux: Flux Brightness and magnitude
Flux to magnitude conversion: Flux Brightness and magnitude
Foreground pixels: Detection options
FORTRAN: Generic data container
Fourier spectrum: Invoking astconvolve
Free software: Your rights
Free Software Foundation: Contributing to Gnuastro
FSF: Contributing to Gnuastro
Full Width at Half Maximum: PSF
Function gradient over pixel area: Sampling from a function
Function groups: Coding conventions
Functions for user interface: Mandatory source code files

Gain: Flux Brightness and magnitude
Gain: Instrumental noise
Galaxy profiles: Galaxies
Galileo, G.: Science and its tools
Gaussian: Invoking astnoisechisel
Gaussian: Invoking astmkcatalog
Gaussian distribution: Quantifying signal in a tile
Gaussian distribution: PSF
Gaussian FWHM: PSF
GCC: Summary and example on libraries
Gérard de Vaucouleurs: Galaxies
Gedit: Hubble visually checks and classifies his catalog
Gedit: Sufi simulates a detection
General file operations: Data containers
Generalized de Vaucouleur profile: Galaxies
Git: Optional dependencies
Git: Version controlled source
Git: Table input output
Git: Git wrappers
GNOME 2: Viewing multiextension FITS images
GNOME 3: Command-line interface
GNOME 3: Viewing multiextension FITS images
GNU Astronomy Utilities (Gnuastro): Introduction
GNU Autoconf: Bootstrapping dependencies
GNU Autoconf: Bootstrapping
GNU Autoconf: Synchronizing
GNU Autoconf: Configuring
GNU Autoconf: Building and debugging
GNU Autoconf Archive: Bootstrapping dependencies
GNU Autoconf Archive: Bootstrapping
GNU Automake: Bootstrapping dependencies
GNU Automake: Bootstrapping
GNU Automake: Building and debugging
GNU AWK: Table
GNU AWK: Invoking asttable
GNU AWK: Invoking asttable
GNU AWK: Invoking astarithmetic
GNU AWK: Invoking aststatistics
GNU AWK: Table input output
GNU Bash: Command-line interface
GNU Bash: Hubble visually checks and classifies his catalog
GNU Bash: Installation directory
GNU Bash: Installation directory
GNU Bash: Keyword manipulation
GNU Bash: Program design philosophy
GNU Binutils: Linking
GNU build system: Mandatory dependencies
GNU build system: Bootstrapping
GNU build system: Installation directory
GNU build system: Configure and build in RAM
GNU build system: Headers
GNU build system: Headers
GNU build system: Building and debugging
GNU C library: New to GNU/Linux?
GNU C library: Bootstrapping dependencies
GNU C library: Bootstrapping
GNU C library: Gnuastro configure options
GNU C library: Configure and build in RAM
GNU C library: Info
GNU C library: Adding new columns to MakeCatalog
GNU C library: Linking
GNU C library: Coding conventions
GNU C library: Mandatory source code files
GNU coding standards: Introduction
GNU coding standards: Coding conventions
GNU coding standards: Coding conventions
GNU Compiler Collection: New to GNU/Linux?
GNU Compiler Collection: Summary and example on libraries
GNU Compiler Collection: Invoking astbuildprog
GNU Compiler Collection: Coding conventions
GNU Coreutils: Multi-threaded operations
GNU Coreutils: Program design philosophy
GNU CPP: Invoking astbuildprog
GNU Emacs: Command-line interface
GNU Emacs: Hubble visually checks and classifies his catalog
GNU Emacs: Hubble visually checks and classifies his catalog
GNU Emacs: Sufi simulates a detection
GNU Emacs: Configure and build in RAM
GNU Emacs: Info
GNU Emacs: Coding conventions
GNU Emacs: Coding conventions
GNU Emacs: Coding conventions
GNU Free Documentation License: Your rights
GNU Free Documentation License: GNU Free Doc. License
GNU General Public License: Your rights
GNU Grep: --help
GNU Grep: Keyword manipulation
GNU Grep: Invoking astcosmiccal
GNU help2man: Bootstrapping dependencies
GNU Info: Info
GNU Libtool: Bootstrapping dependencies
GNU Libtool: Bootstrapping
GNU Libtool: Known issues
GNU Libtool: Linking
GNU Libtool: Linking
GNU Libtool: Linking
GNU Libtool: BuildProgram
GNU Libtool: Invoking astbuildprog
GNU Libtool: Building and debugging
GNU Make: How to run simultaneous operations
GNU Make: Invoking astbuildprog
GNU Parallel: Hubble visually checks and classifies his catalog
GNU Parallel: How to run simultaneous operations
GNU Portability Library (Gnulib): Bootstrapping dependencies
GNU Portability Library (Gnulib): Bootstrapping
GNU Portability Library (Gnulib): Gnuastro configure options
GNU Portability Library (Gnulib): Known issues
GNU Portability Library (Gnulib): Coding conventions
GNU Savannah: Gnuastro project webpage
GNU Scientific Library: GNU Scientific Library
GNU Scientific Library: Generating random numbers
GNU Scientific Library: Permutations
GNU software documentation: Info
GNU style options: Options
GNU Tar: Quick start
GNU Texinfo: Your rights
GNU Texinfo: Bootstrapping
GNU Texinfo: A4 print book
GNU Texinfo: Known issues
GNU/Linux: New to GNU/Linux?
Gnuastro coding convention: Coding conventions
Gnuastro common options: Common options
Gnuastro major version number: GNU Astronomy Utilities 1.0
Gnuastro program structure convention: Program source
Gnuastro project page: Report a bug
Gnuastro test scripts: Test scripts
Gnulib: GNU Portability Library: Bootstrapping dependencies
Gnulib: GNU Portability Library: Bootstrapping
Gnulib: GNU Portability Library: Gnuastro configure options
Gnulib: GNU Portability Library: Known issues
Gnulib: GNU Portability Library: Coding conventions
GPL Ghostscript: Optional dependencies
GPL Ghostscript: Optional dependencies
GPL Ghostscript: Known issues
GPL Ghostscript: Recognized file formats
Gradient over pixel area: Sampling from a function
Gradients in background flux: Photon counting noise
Graphic user interface: Command-line interface
Gravitational lensing: Warp
Grayscale: Color
Groups of similar functions: Coding conventions
GUI: graphic user interface: Command-line interface
GUI: repeating operations: Command-line interface
Gzip: Release tarball

Halted program: Report a bug
HDD: Configure and build in RAM
HDU: Arguments and options
HDU: Input output options
HDU: Invoking astfits
Header data unit: Arguments and options
Header data unit: Input output options
Header file: Coding conventions
Help: Getting help
help-gnuastro mailing list: help-gnuastro mailing list help-gnuastro mailing list
Hexadecimal encoding: Invoking astconvertt
Histogram: Histogram and Cumulative Frequency Plot
Histogram: Sky value misconceptions
HOME: Installation directory
HOME/.local/: Installation directory
Homogeneous coordinates: Warping basics
Homography: Warping basics
Hubble Space Telescope: Tessellation
Hubble Space Telescope: Crop
Hubble Space Telescope: Warp
Hubble Space Telescope: Warping basics
Hyper Suprime-Cam: Tessellation

Image: Color
Image blurring: PSF
Image edges: Resampling
Image format conversion: ConvertType
Image mosaic: Crop
Image mosaic: Warp
Image noise: Noise basics
Image tiles: Crop
Image transformations: MakeProfiles
ImageMagick: Bootstrapping dependencies
Imaging surveys: Crop
Immediate neighbors: Binary datasets
Inconsistent results: Report a bug
Individual profiles: MakeProfiles output dataset Synchronizing
INFOPATH: Installation directory
Input/Output, file: Configure and build in RAM
Inside-out construction: Defining an ellipse
Inside-out construction: Sampling from a function
Install directory: Installation directory
Install with no super-user access: Installation directory
Installation: Installation
Installation, customizing: Configuring
Installed help methods: Getting help
Instrumental noise: Instrumental noise
INT: Options
Integer, Signed: Numeric data types
Integration over pixel: Sampling from a function
Integration to infinity: Profile magnitude
Internal default value: Configuration files
Internally stored option value: Multi-threaded operations
Interpolation: Resampling
Interpolation, bi-linear: Resampling
Interpolation, bicubic: Resampling
Intervals, histogram: Histogram and Cumulative Frequency Plot
ISO C90: Why C
Issue: Gnuastro project webpage

Jaynes E. T.: Science and its tools
JPEG compression quality: Invoking astconvertt
JPEG format: Optional dependencies
JPEG format: Recognized file formats

Ken Thomson: Science and its tools
Kernel, convolution: Convolve
Kernel, convolution: FITS arrays
Kernighan, Brian: Why C

Labeling: NoiseChisel
Large astronomical images: Crop
last-in-first-out: Linked lists
last-in-first-out: FITS header keywords
LaTeX: Bootstrapping dependencies
LaTeX: Recognized file formats
LaTeX: Program design philosophy
Lawrence Livermore National Laboratory: Multithreaded programming
LDFLAGS: Known issues
LD_LIBRARY_PATH: Installation directory
LD_LIBRARY_PATH: Known issues
Learning GNU Info: Info
Lensing simulations: MakeProfiles
less: --help
libgit2: Optional dependencies
libgit2: Git wrappers
libjpeg: Optional dependencies
Library search directory: Installation directory
Library: shared: Linking
Limit, object/clump magnitude: Quantifying measurement limits
Linear spatial filtering: Convolution process
Linked list: Linked lists
Linked list: FITS header keywords
Linking: dynamic: Linking
Linking: Static: Linking
Linux: New to GNU/Linux?
Linux kernel: Configure and build in RAM
Long option abbreviation: Options
Long outputs: --help
Lord Kelvin: Science and its tools
Low level programming: Why C
Luminosity: Flux Brightness and magnitude
Lzip: Release tarball

Macro: Headers
Magnitude zero-point: Flux Brightness and magnitude
Magnitude, object/clump detection limit: Quantifying measurement limits
Magnitude, upper limit: Quantifying measurement limits
Magnitudes from flux: Flux Brightness and magnitude
Mailing list archives: Report a bug
Mailing list archives: help-gnuastro mailing list
Mailing list: bug-gnuastro: Report a bug
Mailing list: bug-gnuastro: Gnuastro project webpage
Mailing list: gnuastro-commits: Developing mailing lists
Mailing list: gnuastro-commits: Commit guidelines
Mailing list: gnuastro-commits: Commit guidelines
Mailing list: gnuastro-commits: Commit guidelines
Mailing list: gnuastro-devel: Gnuastro project webpage
Mailing list: gnuastro-devel: Developing mailing lists
Mailing list: help-gnuastro: help-gnuastro mailing list
Mailing list: info-gnuastro: Version numbering
Mailing list: info-gnuastro: Announcements
Mailing list: info-gnuastro: Synchronizing
main function: Mandatory source code files
Main parameters C structure: Mandatory source code files
main.c: Mandatory source code files
main.h: Mandatory source code files
Major version number: Version numbering
Make: How to run simultaneous operations
make check: Tests
MakeProfiles (astmkprof): MakeProfiles
Making a distribution package: Developer's checklist
Making profiles pixel by pixel: Defining an ellipse
Man pages: Man pages
Management hub: Gnuastro project webpage
Mandatory arguments: Arguments and options
Mandatory arguments: --usage
MANPATH: Installation directory
Mathematical morphology: Binary datasets
Matplotlib, Python: Program design philosophy
Matplotlib, Python: PGPLOT
Matrix: Warping basics
Matrix multiplication: Merging multiple warpings
Matrix, adjacency: Binary datasets
Maximum: Statistical operations
Mean: Statistical operations
Median: Quantifying signal in a tile
Median: Statistical operations
Meta-data: Fits
Metacharacters: Command-line
Metacharacters on the command-line: Arguments and options
Michelson, Albert. A.: Science and its tools
Minimum: Statistical operations
Minor version number: Version numbering
Mixing pixel values: Convolve
Mixing pixel values: Resampling
Möbius, August. F.: Warping basics
mock.fits: Tests
Mode: Quantifying signal in a tile
Mode of a distribution: Sky value misconceptions
Modeling: Modeling and fittings
Modeling stars: Stars
Modifying print book: A4 print book
Modularity: Review of library fundamentals
Moffat beta: PSF
Moffat function: PSF
Moffat FWHM: PSF
Moments: Measuring elliptical parameters
Monte carlo integration: Sampling from a function
Mosaicing: Crop
Mosaicing: Warp
Multi-threaded programs: Multi-threaded operations
Multiextension FITS: Viewing multiextension FITS images
Multiple file opening, reentrancy: CFITSIO
Multiplication, Matrix: Warping basics
Multiplication, matrix: Merging multiple warpings
Multithreaded programming: Multithreaded programming

Names of executables: Executable names
Names, customize: Executable names
Names, programs: Naming convention
NaN: Gnuastro text table format
NaN: Arithmetic operators
NaN: Invoking astwarp
NaN: Invoking aststatistics
NaN: Detection options
NaN: MakeCatalog general settings
NaN: Library blank values
NaN: Library blank values
NaN: Library blank values
NaN: Library blank values
NaN: FITS arrays
Navigating source files: Program source
Necessary parameters: Configuration files
Neighborhood: Convolve
Neighbors, immediate: Binary datasets
No access to super-user install: Installation directory
Noise: Quantifying signal in a tile
Noise: MakeNoise
Noise: Noise basics
Noise simulation: Photon counting noise
Noise, instrumental: Instrumental noise
Non-commutative operations: Merging multiple warpings
Normalizing histogram: Histogram and Cumulative Frequency Plot
nproc: Multi-threaded operations
Number: Statistical operations
Number of CPU threads to use: Operating mode options
Number of CPU threads to use: Configuration files
Number of threads available: Multi-threaded operations
Number, version: Version numbering
Numbers, complex: Invoking astconvolve
Numbers, psudo-random: Generating random numbers
Numbers, random: Generating random numbers

Object magnitude limit: Quantifying measurement limits
Object oriented programming: Why C
On/Off options: Options
Online help: Getting help
Opening (Mathematical morphology): Binary datasets
Opening multiextension FITS: Viewing multiextension FITS images
OpenMP: Multithreaded programming
Operations on files: Data containers
Operations, non-commutative: Merging multiple warpings
Operator, structure de-reference: Mandatory source code files
Optical distortion: Warp
Optimization: Invoking astbuildprog
Optimization: Building and debugging
Optimization flag: Coding conventions
Option values: Options
Optional and mandatory tokens: --usage
Options: Invoking astarithmetic
Options common to all programs: Common options
Options to programs: Arguments and options
Options, abbreviation: Options
Options, GNU style: Options
Options, on/off: Options
Options, repeated: Options
Options, short (-) and long (--): Options
Order in search directory: Installation directory
Output file names, automatic: Automatic output
Output FITS headers: Output headers
Output, wrong: Report a bug
Oversample: Sufi simulates a detection
Oversampling: Oversampling

p: Mandatory source code files
Package managers: Mandatory dependencies
Paper size, A4: A4 print book
Paper size, US letter: A4 print book
Parametric PSFs: PSF
PATH: Installation directory
PDF: Recognized file formats
permutation: Permutations
PGFplots in TeX or LaTeX: Program design philosophy
PGFplots in TeX or LaTeX: PGPLOT
Phase angle: Invoking astconvolve
photo-electrons: Sky value definition
Photoelectrons: Resampling
Photometry, aperture: MakeCatalog
Photometry, aperture: Invoking astmkcatalog
Photon counting noise: Photon counting noise
Picture element: Resampling
Pipe: --help
Pixel: Resampling
Pixel by pixel making of profiles: Defining an ellipse
Pixel mixing: Convolve
Pixel mixing: Resampling
Pixel mixing: Resampling
Pixelated graphics: Recognized file formats
Pixels: Color
Plain text: Recognized file formats
Plotting directly in C: PGPLOT
PNG standard: Color
Point pixels: Resampling
Point source: PSF
Point Spread Function: PSF
Poisson distribution: Photon counting noise
Portable Document format: Recognized file formats
Position angle: Measuring elliptical parameters
Position angle: Defining an ellipse
POSIX threads: Implementation of pthread_barrier
POSIX Threads: Gnuastro's thread related functions
POSIX threads library: Multithreaded programming
Post-fix notation: Reverse polish notation
Postage stamp images: Crop
PostScript: Recognized file formats
PostScript vs. PDF: Recognized file formats
Pre-Processor: Headers
Pre-processor macros: Headers
Precedence, configuration files: Configuration file precedence
prefix/etc/: System wide
Primary colors: Color
printf: Table input output
Probability density function: Histogram and Cumulative Frequency Plot
Probability density function: Sky value misconceptions
Probability density function: Photon counting noise
Profiles, galaxies: Galaxies
progname.c, progname.h: Mandatory source code files
prognameparams: Mandatory source code files
Program crashing: Report a bug
Program names: Naming convention
Program structure convention: Program source
Programming, low level: Why C
ProgramName: Naming convention
Projective transformation: Warping basics
Proper distance: Distance on a 2D curved space
PSF image size: PSF
PSF over-sample: Oversampling
PSF width: PSF
PSF, Moffat compared Gaussian: PSF
Psudo-random numbers: Generating random numbers
pthread: Multi-threaded operations
pthread_barrier: Implementation of pthread_barrier
Public domain: Your rights
Purity: Quantifying measurement limits
Puzzle solving scientist: Science and its tools
Python Matplotlib: Program design philosophy
Python Matplotlib: PGPLOT
Python programming language: Why C

Quality of compression in JPEG: Invoking astconvertt
Quantile: Invoking aststatistics
Quantile: Detection options
Quantile: Statistical operations

Radial profile on ellipse: Defining an ellipse
Radius, effective: Galaxies
Random numbers: Generating random numbers
Raster graphics: Recognized file formats
Readout noise: Instrumental noise
Redirection of output: --help
Redirection of output: --help
Reentrancy, multiple file opening: CFITSIO
Remembering options: Getting help
Remote operation: Command-line interface
Removing ast from executables: Executable names
Repeated options: Options
Report a bug: Gnuastro project webpage
Reproducibility: Upper-limit magnitude settings
Reproducible bug reports: Report a bug
Reproducible results: Command-line interface
Resampling: Resampling
Resource heavy operations: Command-line interface
restrict: Generic data container
Results, wrong: Report a bug
Reverse Polish Notation: Reverse polish notation
RGB: Color
Ritchie, Dennis: Why C
Root access, not possible: Installation directory
Root parameter structure: Mandatory source code files
Rotation of coordinates: Warping basics
Round-off error: Invoking astconvolve
Round-off error: Polygons

Sampling: Resampling
Sampling: Sampling from a function
SAO ds9: Crop options
SAO ds9: SAO ds9
Save output to file: --help
Saving binary image: Recognized file formats
Scaling: Warping basics
Scientist, puzzle solver: Science and its tools
Scripts, startup: Installation directory
Scroll command-line: --help
Sérsic index: Galaxies
Sérsic profile: Galaxies
Sérsic, J. L.: Galaxies
Search directory for executables: Installation directory
Search directory order: Installation directory
Searching text: --help
Second moment: Measuring elliptical parameters
Section of an image: Crop
Secure shell: Command-line interface
SED, stream editor: Executable names
Seed, psudo-random numbers: Generating random numbers
Segmentation: NoiseChisel
Separating tokens on the command-line: Command-line
Setting output file names automatically: Automatic output
Setting PATH: Installation directory
Shared library: Linking
Shared library versioning: Linking
Shear: Warping basics
Shell: Command-line interface
Shell auto-complete: Executable names
Shell script: GNU Astronomy Utilities 1.0
Shell variables: Installation directory
Shift + PageUP and Shift + PageDown: --help
sigma-clipping: Sky value misconceptions
Signal: Quantifying signal in a tile
Signal to noise ratio: Warp
Signal to noise ratio: Resampling
Signed integer: Numeric data types
Simulating noise: Photon counting noise
Simultaneous multithreading: Multi-threaded operations
Single channel CMYK: Color
size_t: Ordered list of size_t
size_t: Doubly linked ordered list of size_t
Skewed Poisson distribution: Photon counting noise
Sky: Sky value
Sky value: Sky value definition
Sky value: Sky value definition
Sky value: Photon counting noise
Software bug: Report a bug
Source code building: Mandatory dependencies
Source code compilation: Mandatory dependencies
Source file navigation: Program source
Source tree: Test scripts
Source, uncompress: Quick start
Spectrum, Fourier: Invoking astconvolve
Spiral galaxies: Hubble visually checks and classifies his catalog
Spread of a point source: PSF
SSD: Configure and build in RAM
SSH: Command-line interface
Standard deviation: Measuring elliptical parameters
Standard deviation: Statistical operations
Standard, FITS: Generic data container
Stars, modeling: Stars
Startup scripts: Installation directory
Startup scripts: Generating random numbers
Static document description format: Recognized file formats
Static linking: Linking
Statistical analysis: Science and its tools
Stitch multiple images: Crop
STR: Options
Stream editor, SED: Executable names
Stroustrup, Bjarne: Science and its tools
Stroustrup, Bjarne: Why C
Structure de-reference operator: Mandatory source code files
Structures: Headers
Subaru Telescope: Tessellation
Submit new tracker item: Report a bug
Suffixes, astronomical data: Arguments
Suffixes, EPS format: Recognized file formats
Suffixes, JPEG images: Recognized file formats
Suffixes, PDF format: Recognized file formats
Suffixes, plain text: Recognized file formats
Sum: Statistical operations
Sum for total flux: Profile magnitude
Superuser, not possible: Installation directory
Support request manager: Report a bug
Surface brightness: Quantifying measurement limits
Symbolic link: Executable names
System Cache: A note on threads
System wide configuration files: System wide

Tables FITS: Recognized table formats
Tabs are evil: Coding conventions
Task tracker: Report a bug
Test: Quick start
Test scripts: Test scripts
Tests, only one passes: Known issues
Tests, running: Tests
tests/ Building and debugging
TeX: Known issues
TeX: Recognized file formats
TeX Live: Bootstrapping dependencies
Threads, CPU: MakeProfiles profile settings
Thresholding: Binary datasets
Tilde expansion as option values: Options
tmpfs file system: Configure and build in RAM
tmpfs-config-make: Building and debugging
tmpfs-config-make: Test scripts
Token separation: Command-line
Top processing source file: Mandatory source code files
Top root structure: Mandatory source code files
Tracker: Report a bug
Tracker: Gnuastro project webpage
Trailing space: Coding conventions
Transform image: MakeProfiles
Transformation, affine: Warping basics
Transformation, projective: Warping basics
Truncation radius: Profile magnitude
Tutorial: Tutorials
Type: Numeric data types

ui.c: Mandatory source code files
ui.h: Mandatory source code files
Uncompress source: Quick start
Undetected objects: Photon counting noise
Unsigned integer: Numeric data types
Upper limit magnitude: Quantifying measurement limits
US letter paper size: A4 print book
Usage pattern: --usage
User interface functions: Mandatory source code files
Using CPU threads: Multi-threaded operations
Using multiple CPU cores: Multi-threaded operations
Using multiple threads: A note on threads

Values to options: Options
Variance: Measuring elliptical parameters
Variation of background flux: Photon counting noise
Vector graphics: Recognized file formats
Version control: Report a bug
Version control: Version controlled source
Version control systems: Optional dependencies
Version number: Version numbering
Versioning: Shared library: Linking
Viewing trackers: Report a bug
Virtual console: Command-line interface
void *: Generic data container

Wall-clock time: A note on threads
WCSLIB: Invoking astwarp
Weighted average: Convolve
WFC3: Warp
White space character: Configuration file format
Wide Field Camera 3: Warp
Wide Field Camera 3: Warping basics
William Thomson: Science and its tools
World Coordinate System: WCSLIB
World Coordinate System: Invoking astwarp
Writing configuration files: Configuration file format
Wrong output: Report a bug
Wrong results: Report a bug

XDF: Quantifying measurement limits

Zero-point magnitude: Flux Brightness and magnitude

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