Studies of EGRET sources with a novel image restoration technique

Details Studies of EGRET sources with a novel image restoration technique Studies of EGRET sources with a novel image restoration technique

2007-05-09

arxiv.org/abs/0705.1362v1

AIPConf.Proc.921:187-189,2007

Astronomy and Astrophysics

Astrophysics

5 pages, 3 figures. Presented at First GLAST Symposium, Stanford University, Stanford, CA, USA, February 5-8, 2007

Scientific paper

10.1063/1.2757299

We have developed an image restoration technique based on the Richardson-Lucy algorithm optimized for GLAST-LAT image analysis. Our algorithm is original since it utilizes the PSF (point spread function) that is calculated for each event. This is critical for EGRET and GLAST-LAT image analysis since the PSF depends on the energy and angle of incident gamma-rays and varies by more than one order of magnitude. EGRET and GLAST-LAT image analysis also faces Poisson noise due to low photon statistics. Our technique incorporates wavelet filtering to minimize noise effects. We present studies of EGRET sources using this novel image restoration technique for possible identification of extended gamma-ray sources.

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