XMM-Newton Science Analysis System
omvariability (omvariability-1.5) [xmmsas_20211130_0941-20.0.0]
The aim of the test is to demonstrate that omvariability
correctly computes variability parameters for each common source in the list of
input SWS source-list files and correctly adds the data in the correct
positions in the given output file.
The test directory for omvariability contains a shell program that performs the following:
- Runs the program createfiles that produces-
- A master source list file (masterfile.fits that contains celestial
coordinates, corrected count-rates and errors, source extension,
confusion and quality flags. This file has a similar structure to
that of an observation source-list file produced by the SAS
- Four source-list files each containing a list of sources
taken randomly from the master source-list file. Each source has a random small
error added to the corrected count-rate. These files would be the input source-lists
to omsrclistcomb that would produce the output file masterfile.fits.
- A reference source-list file (checkfile.fits, first copied from masterfile.fits,
and then having variability columns V_CHI2 and V_NSTD added. These columns
are computed using the corrected count-rates for each source in a SWS file that corresponds
to a given source in masterfile.fits.
- Runs omvariability with the parameter srclistsets set to the list of
SWS files and the parameter outset set to the file masterfile.fits
- Runs the program checkoutput that compares the celestial-coordinates and variability parameters
stored in the SRCLIST tables masterfile.fits with those stored in checkfile.fits.
For any column (eg RA or V_CHI2 the values in each row of the two tables are compared, and any
difference in the quantities that exceeds a tolerance of 1e-6 is considered to be an error and the test-harness
fails outputting details where the failure occurred.
checkoutput also checks that the variability parameters are computed properly by computing
the parameters for 10 unique sources, each having a hard-wired list of multiply-detected sources, and comparing
the computed and hard-wired values. Any difference greater than 1e-6 is reported as an error.
For more thorough development testing, the number of SWS files can be set to any number by editing
the program createfiles.
XMM-Newton SOC -- 2021-11-30