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XMM-Newton Science Analysis System


dpssvali (dpssvali-0.6) [xmmsas_20050815_1803-6.5.0]

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Description

The SAS task dpssvali is part of the Data Product Screening System (DPSS), which is divided into an automatic step (described here) and an subsequent visual verification step based on Graphical User Interfaces. The separation into an automatic validation and a visual verification process has been proven as an effective and powerful method to secure a high quality of data products produced by a standard analysis software. The SAS task dpssvali is written in perl and depends on the SAS task dscheck. For a certain group of XMM PPS products (e.g. EPIC background maps, EPIC maximum-likelihood source lists, EPIC images, EPIC sensitivity maps) a list of commands is executed stored in an ascii file (hereafter check file). Each ascii check file contains a sequence of commands which refer to a certain group of XMM PPS products, e.g. bkgmap.chk for all EPIC background maps. The task dpssvali selects a certain check file for execution in dependence of the PPS product type. The tests include existence and parameter range checks for header key words and source tables columns of EPIC PPS Fits files. The output of the validation is written to the files 'invalid.log' and 'valid.log'. The checks to be carried are coded in ascii files, which can be easily modified.

The following ascii check files are presently available:

• bkgmap.chk

  This check file performs existence and parameter range checks for EPIC PN, MOS1, MOS2 background maps in the energy bands 0,1,2,3,4 and 5. The existence checks include the header keywords CONTENT, INSTRUME, DATAMODE, OBS_ID, EXP_ID, DATE-OBS, DATE-END. Parameter range checks are performed for the header keywords RA_PNT (check fails, if RA_PNT is outside (0,360)), DEC_PNT (-90,90), EQUINOX (1950,2000), EXPOSURE (5000,75600).

• expmap.chk

  Existence and parameter range checks for EPIC PN, MOS1, MOS2 exposure maps in the energy bands 1,2,3,4,5,7.

• exsnmp.chk

  Existence and parameter range checks for EPIC PN, MOS1, MOS2 sensitivity maps in the energy bands 1,2,3,4,5,7.

• omsrli.chk

  This check file performs existence and parameter range checks as described above (for the omsrli.chk file) for EPIC Maximum-Likelihood Source lists. In addition, the secondary header content is validated. The check fails, if the source list SRCLIST does not exists. The following source list table columns are expected to be present (the allowed parameter range is given in brackets): SRC_INST (0,3), ID_BAND (0,5), SCTS (1,100000), FLUX (0,1e-4), RA (0,360), DEC (-90,90), HR1 (-1,1), HR2 (-1,1), HR3 (-1,1)

• image.chk

  This check file performs existence and parameter range checks for EPIC PN, MOS1, MOS2 and OM images (except OM sky images) in the energy bands 1,2,3,4,5,7 (naming convention TTTTTT = IMAGE_). The performed checks are identical to the checks coded in the bkgmap.chk file. In addition the check file performs existence checks for the presence of the World Coordinate System (WCS) in the primary header.

• imageom.chk

  This check file performs existence and parameter range checks for OM sky images TTTTTT = SIMAGE). The performed checks are identical to the checks coded in the image.chk file, except the range check for the exposure, which should now be within the range of 500 to 75600 seconds.

• swsrli.chk

  The check file performs eixstence and parameter range checkes for OM detect source lists for different exposures (TTTTTT = SWSRLI). Primary header existence and parameter range checkes as for other OM PPS products mentioned above, except the range check for the magnitude MAG which should be within 5 and 30.

• obsrls.chk

  The check file performs eixstence and parameter range checkes for OM detect lists for different exposures (TTTTTT = OBSRLS). Primary header existence and parameter range checkes as for other OM PPS products mentioned above, except the range check for the U magnitude MAG_U which should be within 5 and 30.

• mod8mp.chk

  This check file performs existence and parameter range checks for OM MOD MAP images TTTTTT = MOD8MP. The performed checks are identical to the checks coded in the imageom.chk file.

• flafld.chk

  This check file performs existence and parameter range checks for OM FLAT FIELD images TTTTTT = FLAFLD. The performed checks are identical to the checks coded in the imageom.chk file.