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Simulations of sources with flux f(0.5-2)=2e-12cgs in grid. Pointed observations and survey fields have been simulated. The latter use the [[https://wiki.mpe.mpg.de/eRosita/ScienceRelatedStuff/ExpoMaps?action=AttachFile&do=view&target=oneyearsurvey_att.fits|attitude file: oneyearsurvey_att.fits]]. |
Description of performance tests and simulations relevant to the APETOOL and SHAPELIB libraries.
Simulations are underway to test the following aspects relevant to apetool and shapelib:
- How well/accurate can the shapelet-PSF model determine the flux of point-sources: simulate fields (both survey-mode and pointed) with a grid of point sources of fixed flux and spectral. Run ermldetect to detect the sources and measure their flux and compare with the input one.
- How well can APETOOL reconstruct the selection function of eROSITA observations: simulate fields (both survey-mode and pointed) with a point-sources with fluxes drawn from a logN-logS distribution and fixed spectral shape. Run ERLDETECT and ptoduce a source list, APETOOL to threshold at a given false detection probability and estimate field sensitivities. Reconstruct input logN-logS and compare.
The relevant simulations are based on modified versions of Nicolas Clerc's python scripts described here. The main modifications are: (i) functions to generate attitude files for both survey and pointed observations (ii) place sources in a grid of fixed spacing within the survey field, (iii) use of simple power-law X-ray spectra with a choice of Gammas for the point sources, (iv) functionality to produce sources of fixed flux. A tarball with the relevant python scripts can be found [[|here(to be added soon)]].
Progress so far
Simulations of sources with flux f(0.5-2)=2e-12cgs in grid. Pointed observations and survey fields have been simulated. The latter use the attitude file: oneyearsurvey_att.fits.