Friday, July 30, 2010

Extra Note - July 30, 2010

Non-detection of AGL J2241+4454

In ATel #2761, the AGILE team reported the detection of a possible new gamma-ray point source (AGL J2241+4454) at R.A.,Dec. = 340.3, 44.9 (J2000). Preliminary analysis of LAT data for the same direction and time period shows no significant detection above 100 MeV. Assuming a power law spectrum with photon index 2, we place an upper limit on the integral flux above 100 MeV of 1.0 x 10-7 ph cm-2 s-1, at 95% confidence. For a softer source (index=3), the limit shifts up to 3.0 x 10-7.

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