Chandra X-Ray Observatory
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Last modified: 26 October 2016

URL: http://cxc.harvard.edu/ciao/bugs/destreak.html

Bugs: destreak


Table of Contents

Caveats

Bugs


Caveats

Some observations have very high "streak" count rates. The default tool parameters may not clean all of them.

For some observations with very high streak rates, the 'max_rowloss_fraction' may need to be increased to remove the excess noise. Setting the parameter max_rowloss_fraction=1.0e-3 may help to remove the excessive streak noise. However, users must be extrodinarly careful, especially with Gratings and CC mode observations that real events are not removed.


Bugs

Destreak can mistakenly drop the last event if it is the only event assocated with the last exposure number.

Subarrays

destreak does not take the limited number of rows in subarray into account when determining the streak rate per node.


Last modified: 26 October 2016
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