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Last modified: 20 July 2010

What does this warning mean?

# acis_process_events (CIAO 4.2): The following error occurred 26941 times:
  dsAFEBADPCNTERR -- WARNING: Event island contains 1 or more bad pixels.

This warning indicates that one or more of the nine pixels in a 3x3 event island is identified as a bad pixel. The 26,941 events for which this is the case (in this example) have a STATUS bit set to one. These events can be removed from an event file by using dmcopy with status=0, as shown in the ACIS Data Preparation threads. This message is produced whenever a bad pixel file is used and may be safely ignored.

Last modified: 20 July 2010