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XMM-Newton Science Analysis System


arfgen (arfgen-1.75.6) [???]

Meta Index / Home Page / Usage and Examples

Example 2: Correcting for bad pixels

To correct for bad pixels and bad columns (section 7.10) a file containing the bad pixel extensions must be specified on the command line by:

arfgen spectrumset=spectrum.ds badpixlocation=myevents.ds

The bad pixel information is, at least initially, stored in the event files.

By default the code looks for pixels which fall outside the CCD collecting area and outside the field-of-view with a resolution of 2 arcseconds. In some cases, for example if the majority of the source region lies outside the field of view, this resolution is too coarse. It may be improved by:

arfgen spectrumset=spectrum.ds badpixlocation=myevents.ds badpixelresolution=1.0 which improves the accuracy of the bad pixel calculation. Note that an increased resolution will cause the execution time of the code to increase substantially.