Input AAR:
The AAR FITS files for SWS and LWS are the final products of pipeline processing.
ISAP defines a new named structure with simpler data names and read these
file into it. This new AAR contains the following tags.
type - 'LAAR' for LWS FITS
'SAAR' for SWS FITS
'YAAAR' for processed AAR (stands for "Yet Another AAR"
header - Array of strings of 80 chars
history - Array of strings of 32700 chars each
data - array of structures of data containing the possible data tags as follows.
{WAVE, WAVEU, FLUX, STDEV, TINT, DET, ITK, UTK, RPID,
SPARE, LINE, SDIR, SCNT, STATUS, FLAG}
The FITS primary and secondary headers are written into the header tag of AAR. In addition,
all HISTORY keywords found in FITS headers are saved in history tag.
The traslation of input FITS file parameters into ISAP AAR data tags
is given as follows:
SAAR/LAAR SWS LWS
--------- -------- --------
WAVE SWAAWAVE LSANWAV
WAVEU LSANWAVU
FLUX SWAAFLUX LSANFLX
STDEV SWAASTDV LSANFLXU
TINT SWAATINT LSANTINT
DET SWAADETN LSANDET
ITK SWAAITK LSANITK
UTK SWAAUTK LSANUTK
RPID SWAARPID LSANRPID
SPARE SWAASPAR LSANFILL
LINE SWAALINE LSANLINE
SDIR SWAASDIR LSANSDIR
SCNT SWAASCNT LSANSCNT
STATUS SWAASTAT LSANSTAT
FLAG SWAAFLAG LSANFLAG
YAAAR:
Input to ISAP are the files as described above. However, sometime during
processing information is lost on certain data tags. For example when you
rebin/merge/average spectra from individual detectors into one final spectrum,
you are loosing the information on individual detectors. Thus, ISAP processed
AAR , known as YAAAR, can have 4 to 15 data tags. The minimum data tags
expected are WAVE, FLUX, STDEV, and FLAG.
Last update: 22 March 01