*----------------------------------------------------------------------------- * * WCSLIB 4.3 - an implementation of the FITS WCS standard. * Copyright (C) 1995-2007, Mark Calabretta * * This file is part of WCSLIB. * * WCSLIB is free software: you can redistribute it and/or modify it under * the terms of the GNU Lesser General Public License as published by the * Free Software Foundation, either version 3 of the License, or (at your * option) any later version. * * WCSLIB is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for * more details. * * You should have received a copy of the GNU Lesser General Public License * along with WCSLIB. If not, see . * * Correspondence concerning WCSLIB may be directed to: * Internet email: mcalabre@atnf.csiro.au * Postal address: Dr. Mark Calabretta * Australia Telescope National Facility, CSIRO * PO Box 76 * Epping NSW 1710 * AUSTRALIA * * Author: Mark Calabretta, Australia Telescope National Facility * http://www.atnf.csiro.au/~mcalabre/index.html * $Id: wcstab.keyrec,v 4.3 2007/12/27 05:35:51 cal103 Exp $ *----------------------------------------------------------------------------- * List of FITS header keyrecords used by 'twcstab' to construct a FITS file * for testing wcstab() and fits_read_wcstab(). The coordinate arrays and * index vectors in the binary tables extensions are generated by twcstab * itself. * * Lines in this file beginning with '*' are ignored by twcstab. *----------------------------------------------------------------------------- SIMPLE = T / Standards-conformant FITS format BITPIX = -32 / IEEE single precision floating point NAXIS = 4 / Four image axes NAXIS1 = 256 / Length of 1st image axis - fastest varying NAXIS2 = 128 / Length of 2nd image axis NAXIS3 = 4 / Length of 3rd image axis NAXIS4 = 1 / Length of 4th image axis - slowest varying EXTEND = T / Binary table extensions contain lookup tables. COMMENT ----------------------------------------------------------------------- COMMENT Of the four -TAB coordinate axes, the first two celestial axes are COMMENT associated with a 2-D lookup table; the third spectral axis contains COMMENT a list of four wavelengths in the radio, infrared, optical, and x-ray COMMENT regimes; and the fourth time axis contains a list of observation COMMENT dates. Axes 3 and 4 are adapted from Table 11 of WCS Paper III. COMMENT COMMENT There are two separate bintables holding the -TAB arrays that differ COMMENT only in EXTVER. The first holds the 2-D celestial table, and the COMMENT second holds the two 1-D spectral and time coordinate tables. COMMENT ----------------------------------------------------------------------- WCSAXES = 4 / Four coordinate axes WCSNAME = '-TAB test file' / Name of this system CRPIX1 = 129.0 / Pixel coordinate of reference point CRPIX2 = 65.0 / Pixel coordinate of reference point PC1_1 = 0.996194698 / 5 deg rotation matrix element PC1_2 = 0.087155743 / 5 deg rotation matrix element PC2_1 = -0.087155743 / 5 deg rotation matrix element PC2_2 = 0.996194698 / 5 deg rotation matrix element CDELT1 = 1.0 / Index (psi_m) changes by one per pixel CDELT2 = 1.0 / Index (psi_m) changes by one per pixel CRVAL1 = 136.0 / Table index (Psi_m) at the reference point CRVAL2 = 76.0 / Table index (Psi_m) at the reference point CTYPE1 = 'RA---TAB' / Right ascension in lookup table CUNIT1 = 'deg' / Right ascension units CNAME1 = 'Right ascension (J2000)' / Axis name for labelling purposes PS1_0 = 'WCS-TABLE' / EXTNAME of bintable extension for -TAB arrays PV1_1 = 1 / EXTVER of bintable extension for -TAB arrays PV1_2 = 1 / EXTLEVEL of bintable extension for -TAB arrays PS1_1 = 'CelCoords' / Celestial coordinate array PS1_2 = 'RAIndex' / Right ascension index vector PV1_3 = 1 / Axis number in coordinate array CTYPE2 = 'DEC--TAB' / Declination in a slant zenithal projection CUNIT2 = 'deg' / Declination units CNAME2 = 'Declination (J2000)' / Axis name for labelling purposes PS2_0 = 'WCS-TABLE' / EXTNAME of bintable extension for -TAB arrays PV2_1 = 1 / EXTVER of bintable extension for -TAB arrays PV2_2 = 1 / EXTLEVEL of bintable extension for -TAB arrays PS2_1 = 'CelCoords' / Celestial coordinate array PS2_2 = 'DecIndex' / Declination index vector PV2_3 = 2 / Axis number in coordinate array RADESYS = 'FK5' / Mean equatorial coordinates, IAU 1984 system EQUINOX = 2000.0 / [yr] Equinox of equatorial coordinates CRPIX3 = 0.5 / Spectral bin initial edge of initial pixel CRPIX4 = 1.0 / Temporal bins are at begin/end time PC3_3 = 1.0 / Linear transformation matrix element PC3_4 = 0.0 / Linear transformation matrix element PC4_3 = 1.0 / Linear transformation matrix element PC4_4 = 1.0 / Linear transformation matrix element CDELT3 = 1.0 / Index (psi_m) changes by one per pixel CDELT4 = 1.0 / Index (psi_m) changes by one per pixel CRVAL3 = 0.5 / Table index (Psi_m) at the reference point CRVAL4 = 0.0 / Table index (Psi_m) at the reference point CTYPE3 = 'WAVE-TAB' / Wavelength axis by lookup table CUNIT3 = 'm' / Wavelength in metres CNAME3 = 'Wavelength' / Axis name for labelling purposes PS3_0 = 'WCS-TABLE' / EXTNAME of bintable extension for -TAB arrays PV3_1 = 2 / EXTVER of bintable extension for -TAB arrays PV3_2 = 1 / EXTLEVEL of bintable extension for -TAB arrays PS3_1 = 'WaveCoord' / Wavelength coordinate array PS3_2 = 'WaveIndex' / Wavelength index vector PV3_3 = 1 / Axis number in coordinate array CTYPE4 = 'TIME-TAB' / Time axis by lookup table CUNIT4 = 'a' / Time in years CNAME4 = 'Observation date' / Axis name for labelling purposes PS4_0 = 'WCS-TABLE' / EXTNAME of bintable extension for -TAB arrays PV4_1 = 2 / EXTVER of bintable extension for -TAB arrays PV4_2 = 1 / EXTLEVEL of bintable extension for -TAB arrays PS4_1 = 'TimeCoord' / Time coordinate array PS4_2 = 'TimeIndex' / Time index vector PV4_3 = 1 / Axis number in coordinate array END