empty spectrum

From: <rgibson_at_email.domain.hidden>
Date: Wed, 15 Nov 2006 16:02:38 -0500
In some cases, I wish to extract an ACIS spectrum for a source which has zero
counts in the extraction region.  (Maybe the source was detected at other
wavelengths, and I want to put upper limits on the X-ray flux.)

psextract fails for these guys, but one can create an ARF and RMF manually.  But
then I still don't have a spectrum file (dmextract fails).

Is there a simple, robust way to associate the ARF and RMF with a zero-count
spectrum and analyze the data as a normal spectrum?

Thanks,
Rob
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Received on Wed Nov 15 2006 - 16:25:05 EST

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