Bugs: acis_run_hotpix

Caveats

1. Obtaining the bias and parameter block files

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

3. Afterglows with few events (01 Dec 2006)

Bugs

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

Caveats

1. Obtaining the bias and parameter block files

   As of July 2005, it is possible to to obtain the correct bias and parameter block files required to run acis_run_hotpix from ChaSeR or WebChaSeR; they are included in the secondary data products. More information on how these files are used is available in the Create a New ACIS Bad Pixel File: Identify ACIS Hot Pixels and Cosmic Ray Afterglows thread.

2. 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 3.4): 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.

3. Afterglows with few events (01 Dec 2006)

   Afterglows with few events may not be identified by acis_run_hotpix because they are not statistically significant after performing one million trials per CCD. Users may use the deprecated tool acis_detect_afterglow if they find it works better for their data. However, be aware that one of the reasons that acis_run_hotpix was developed is that acis_detect_afterglow often removes good X-ray events, too (i.e. it seems to do more harm than good in general).

Bugs

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.