Previous: CATALOG /VELETA
In the ASTRO source catalog format each source uses one line of the
catalog file. Each line should contain the following consecutive key-
words (some may be omitted):
1) Source name field:
The source name field is a composite item which can accomodate several
names for a single source. Names should be separated by a vertical bar
( | ) with no embedded spaces, e.g.: B0415+379|3C111. Each name must
have at most 12 characters.
2) Coordinate system: 2 characters, optional, may be:
EQ for equatorial coordinates. If "EQ" is given explicitely,
then the Equinox value is mandatory.
GA for Galactic II coordinates.
EC for J2000 Ecliptic coordinates
HO for horizontal coordinates
DA for equatorial, present-day coordinates.
3) Equinox: needed for equatorial coordinates after "EQ" keyword.
4) Longitude-like coordinate: in degrees, except for EQ and DA where it
should be in hours. Format is
"hh:mm:ss.sss" is a generalized sexagesimal format
(hh:mm:ss.sss or dd.ddd or hh:mm.mmm)
"first" is an (optional) first order time derivative
"second" is an (optional) second order time derivative
5) Latitude-like coordinate: in degrees, same format as above.
The following OPTIONAL keywords can also be included, and may be listed in
A) a "Velocity" keyword
where "Velocity" is an alphabetic code, equal to "LSR", "HELIO",
or "EARTH". HELIO actually means: referred to the Solar System
barycenter. Value is the velocity in km/second, in the corresponding
reference frame. Default is zero.
A') the "REDSHIFT" keyword
Value is the redshift value.
The user may provide a redshift OR a velocity, not both.
B) an "Intensity" keyword
FLUX Value [Index]
Value is the flux in Jy. Index is an optional spectral index
Value is the magnitude, Unknown values can be coded 99.99
Mx can be MAGNITUDE, or x is one of V,R,I,J,H,K,L,M,N to indicate
the visual band
C) a "Project" keyword
to specify a project identification (a string without spaces)
D) an "hour" keyword to indicate the validation hour for the coordinates
(which is useful when time derivatives are given), specified by
E) A "Parallax" keyword
Value is in arcsec.
Any other keyword will be ignored.