[Fri Aug  2 05:52:13 2013] Warning, more than one pbk0 file found in ACISBiasPath directory acisf08184/data/aux/
[Fri Aug  2 05:53:07 2013] Warning, bgd. level not computed because source mask doesn't exist
[Fri Aug  2 05:53:08 2013] Warning, bgd. level not computed because source mask doesn't exist