keywpars
ra = RA
Right Ascension keyword. (Value in HMS format).
dec = DEC
Declination keyword. (Value in HMS format).
ut = UT
UT of observation keyword. This field is the UT start of the observation.
(Value in HMS Format).
utmiddle = UTMIDDLE
UT mid-point of observation keyword. This field is the UT mid-point of
the observation. (Value in HMS Format).
exptime = EXPTIME
Exposure time keyword. (Value in Seconds).
epoch = EPOCH
Epoch of coordinates keyword. (Value in Years).
date_obs = DATE-OBS
Date of observation keyword. Format for this field should be
dd/mm/yy, delimited by either a '-' or a '/'.
.ce
OUTPUT KEYWORDS
hjd = HJD
Heliocentric Julian date keyword. (Value in Days).
mjd_obs = MJD-OBS
Modified Julian Data keyword. The MJD is defined as the julian date of
the mid-point of the observation - 2440000.5. (Value in Days).
vobs = VOBS
Observed radial velocity keyword. (Value in Km/sec).
vrel = VREL
Observed radial velocity keyword. (Value in Km/sec).
vhelio = VHELIO
Corrected heliocentric radial velocity keyword. (Value in Km/sec).
vlsr = VLSR
Local Standard of Rest velocity keyword. (Value in Km/sec).
vsun = VSUN
Epoch of solar motion. (Character string with four real valued fields
describing the solar velocity (km/sec), the RA of the solar velocity (hours),
the declination of the solar velocity (degrees), and the epoch of solar
coordinates (years)).
The image header keywords used by the fxcor task can be edited if they differ from the NOAO standard keywords. For example, if the image header keyword giving the exposure time for the image is written out as "EXP-TIME" instead of the standard "OTIME" at a given site, the keyword accessed for that information may be changed based on the value of the exptime parameter.
The vhelio keywords must be added to the image header of the template spectrum and should contain the known radial velocity of the template star. The output keywords may be added to the object image header if the tasks fxcor.imudate parameter is set.
1. List the image header keywords.
rv> lpar keywpars
2. Edit the image header keywords
rv> keywpars