A catalogue file is a list of target names and positions in the format used by the WHT TCS. A catalogue is simply a text file of positional information in free format with spaces as separators. All data for an entry should be on one line of the file. Anything following an asterisk or exclamation mark is treated as a comment and is ignored. Do not use tab, control or other peculiar characters. The parameters must be in the order: Name, Right Ascension, Declination, Equinox, proper motion in right ascension, proper motion in declination, Epoch, Parallax, Radial velocity. The first four parameters are mandatory and the remainder are optional with sensible defaults. The formats and units of the necessary parameters are as follows:
The letter is followed immediately by a number indicating the
epoch of the mean equator and equinox of that system
(e.g. B1950.0 or J1987.5).
* For apparent positions this field should contain the word APPARENT (abbreviable to A). In order to maintain strict compatibility with the WHT TCS, no epoch is specified, and the DATE command should be used to set the epoch of observation.
The formats, units and defaults of the optional parameters are as follows:
Examples of catalogue files are:
3C567 12 34 56.78 -01 23 45.6 B1950 NGC123 00 12 46.6 05 34 56 J1987.5 COMET 12 12 12.12 +12 12 12.1 A
SP1 00 31 22.2 -12 24 21 B1950.0 0.011 -0.17
S01-07 00 50 7.596 -10 38 39.54 J2000 -0.01531 -0.2287 2000 .059 8 S01-22 01 06 7.724 -23 59 33.07 J2000 -0.00225 -0.0409 2000 .000 0