WCSTools

Source Catalog Access Subroutines

actread.c
Return stars from the TDC binary format catalog file for a given RA, Dec, and magnitude range. The SAO, PPM, and IRAS Point Source Catalogs are available in this format.

ctgread.c
This contains the generic catalog reading subroutines which call the appropriate catalog-specific subroutines, defaulting to the use of a TDC ASCII format catalog file for a given RA, Dec, and magnitude range.

gscread.c
Return HST Guide Stars or GSC-ACT Guide Stars from standard CDROM format FITS table files for a given RA, Dec, and magnitude range. FITS I/O subroutines are called.

gsc2read.c
Return GSC II Stars from the STScI web site for a given RA, Dec, and magnitude range. Data come over the web as tab-separated tables and are converted to WCSTools' internal format using subroutines from tabread.c.

sdssread.c
Return Sloan Digital Sky Survey objects from the SDSS web site for a given RA, Dec, and magnitude range. Data come over the web as tab-separated tables and are converted to WCSTools' internal format using subroutines from tabread.c.

tabread.c
Return stars from a tab table format catalog file for a given RA, Dec, and magnitude range. Based on John Roll's Starbase format.

tmcread.c
Return 2MASS Point Sources from the set of ASCII catalog files distributed by IRSA for a given RA, Dec, and magnitude range.

ty2read.c
Return Tycho-2 Stars from the catalog's standard CDROM format for a given RA, Dec, and magnitude range.

uacread.c
Return USNO A1.0, A2.0, SA1.0, or SA2.0 Catalog stars from standard zoned files for a given RA, Dec, and magnitude range.

ubcread.c
Return USNO B1.0 Catalog stars from standard zoned files for a given RA, Dec, and magnitude range.

ujcread.c
Return USNO UJ Catalog stars from its standard CDROM format files for a given RA, Dec, and magnitude range.

catutil.c
Subroutines to figure out catalog type from its name, format catalog numbers, decode ranges of numbers (n1-n2,n3,n4...), and convert dates and times between various formats. (Added in version 2.6)

dateutil.c
Subroutines to convert dates and times between various formats. (Added in version 2.6.3)

Last updated 13 October 2005 by Doug Mink, SAO Telescope Data Center,