Bugs: dmextract

Caveats

1. Omitting the minimum or maximum of the binning range

Bugs

1. dmextract does not ignore pixels in an image with a value equal to the BLANK keyword.

Caveats

1. Omitting the minimum or maximum of the binning range

   The minimum and maximum range values may be omitted from the binning specification, for instance

   unix% dmextract "acis_evt2.fits[ccd_id=3,sky=region(src2.reg)][bin time=::2000]"
   

   The default values will be filled in from the maximum valid range of the column (in the case of a FITS file, the values of the TLMINn, TLMAXn columns).

   Note, however, that using an open-ended range can lead to unexpected results at the binning endpoints, such as zero-count bins and zero exposure values. If the allowed range is very large (e.g. a range covering all possible long-integer values), it may cause the tool to fail due to lack of machine resources.

Bugs

1. dmextract does not ignore pixels in an image with a value equal to the BLANK keyword.