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A Quick Look at What You Have

The PPS directory for the OM products contains files with nomenclature as described in Tables 5.2 and 5.3. As can be seen in those tables, the OM produces, among other things, sky images (*SIMAGE*.FTZ) and source lists (*SWSRLI*.FTZ). Further, there are low resolution sky images for each filter; they follow the nomenclature:

So for example, P0123700101OMX000RSIMAGV000.FTZ is the final low resolution sky image in the V filter. As with all images, it can be viewed in Hera with fv. To see what files have been summed to make the final image, search for the keyword XPROC0 in the FITS header. For our example image, this would be

XPROC0  = 'ommosaic imagesets=''product/P0123700101OMS004SIMAGE1000.FIT produc&'
CONTINUE  't/P0123700101OMS415SIMAGE1000.FIT product/P0123700101OMS416SIMAGE10&'
CONTINUE  '00.FIT product/P0123700101OMS417SIMAGE1000.FIT product/P0123700101O&'
CONTINUE  'MS418SIMAGE1000.FIT'' mosaicedset=product/P0123700101OMX000RSIMAGV0&'
CONTINUE  '00.FIT exposuremap=no exposure=1000 # (ommosaic-1.11.7) [xmmsas_200&'
CONTINUE  '61026_1802-6.6.0]'

The source list file (*SWSRLI*.FTZ) also contains useful information for the user; the column names are listed in Table 9.1.


Table 9.1: Some of the important columns in the source list file.
Column name Contents
   
   
SRCNUM Source number
RA RA of the detected source
DEC Dec of the detected source
POSERR Positional uncertainty
RATE extracted count rate
RATE_ERR error estimate on the count rate
SIGNIFICANCE Significance of the detection (in $\sigma$)
MAG Brightness of the source in magnitudes
MAGERR uncertainty on the magnitude
   



next up previous contents
Next: Imaging Mode Up: An OM Data Processing Previous: OM Artifacts and General   Contents
Lynne Valencic 2011-07-26