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XMM-Newton Science Analysis System


evselect (evselect-3.47.8) [xmmsas_20030110_1802-5.4.1]

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Usage Examples

• Extract a light curve from the table event.fits:EVENTS, using the default column name TIME. Write the light curve to the default file rate.fits.

  evselect table='event.fits:EVENTS' withrateset=true
  

• Extract an image from the table event.fits:RAW EVENTS, using the default columns RAWX, RAWY when the value of RAWX is greater than 50. Write the output to the default file image.fits. The results of the filtering is not saved.

  evselect table='event.fits:RAW EVENTS' expression='RAWX>50'
    withimageset=true
  

• Extract a spectrum from the first extension in the file event.fits, in a circle in X, Y space. Write the spectrum to the file myspec.fits, and write the filter results back into the input file. Accumulate the spectrum using the default energy column PHA:

  evselect table='event.fits' expression='circle(152.5,194.0,14.5,X,Y)' 
    withspectrumset=true spectrumset=myspec.fits keepfilteroutput=true
  

• Filter the table event.fits:EVENTS, using the data subspace information in the block dss.fits:SPECTRUM. Rejected events are removed from the output file, which is written to good_events.fits.

  evselect table='event.fits:EVENTS' filtertype='dataSubspace' 
    dssblock='dss.fits:SPECTRUM' withfilteredset=true filteredset='good_events.fits'
  

An example of using evselect in a script can be found by looking at the source script for the SAS task imagechain.