Bugs: acis_run_hotpix

At present, the tool acis_run_hotpix is being used in the pipeline to identify cosmic-ray afterglows. The results obtained using this tool should be sufficient unless a user is interested in searching for or studying sources that have a small number of counts (i.e. less than about 10). In these situations, it may be advantageous to use the tool acis_detect_afterglow (in addition to acis_run_hotpix) to try to eliminate afterglows that have only a few events. Some care is required to ensure that acis_detect_afterglow does not eliminate a significant number of real x-ray events.

For more information, read the Cosmic-Ray Afterglows why topic.

A list of bugs fixed in CIAO 4.0 is available.

Caveats

1. WARNING: File /tmp/hotpixel_list.fits does not have any rows.

Caveats

1. WARNING: File /tmp/hotpixel_list.fits does not have any rows.

   Some datasets will return this warning when acis_run_hotpix is run:

   # acis_classify_hotpix (CIAO 4.0): WARNING: File /tmp/hotpixel_list.fits does not have any rows.
   

   It just means that no hot pixels were identified in the observation, which is a normal occurrence.

Bugs fixed in CIAO 4.0

The following is a list of bugs that were fixed in the CIAO 4.0 software release.

1. Read mode of data is printed to screen. (27 Jun 2006)

   If you have "echo=yes" set in your dmkeypar parameter file, acis_run_hotpix prints the READMODE of the observation to the screen:

   unix% acis_run_hotpix
   Input event list (acisf04187_reset_evt1.fits):
   Output bad pixel file (acisf04187_bpix1.fits): test
   Input parameter block file (acisf167214283N001_pbk0.fits):
   Input mask file ( <filename> | none | NONE ) (acisf04187_001N001_msk1.fits):
   Input bad pixel file (../primary/acisf04187_001N001_bpix1.fits):
   Input bias images (@bias_files.lis):
   TIMED
   

   This is just extra screen output which doesn't affect the script results.