Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey

Details Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey

2009-02-09

arxiv.org/abs/0902.1559v1

Astrophys.J.700:597-622,2009

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

Submitted to ApJ. Not yet refereed. 61 pages, 26 figures

Scientific paper

10.1088/0004-637X/700/1/597

The first three months of sky-survey operation with the Fermi Gamma Ray Space Telescope (Fermi) Large Area Telescope (LAT) reveals 132 bright sources at |b|>10 deg with test statistic greater than 100 (corresponding to about 10 sigma). Two methods, based on the CGRaBS, CRATES and BZCat catalogs, indicate high-confidence associations of 106 of these sources with known AGNs. This sample is referred to as the LAT Bright AGN Sample (LBAS). It contains two radio galaxies, namely Centaurus A and NGC 1275, and 104 blazars consisting of 57 flat spectrum radio quasars (FSRQs), 42 BL Lac objects, and 5 blazars with uncertain classification. Four new blazars were discovered on the basis of the LAT detections. Remarkably, the LBAS includes 10 high-energy peaked BL Lacs (HBLs), sources which were so far hard to detect in the GeV range. Another 10 lower-confidence associations are found. Only thirty three of the sources, plus two at |b|>10 deg, were previously detected with EGRET, probably due to the variable nature of these sources. The analysis of the gamma-ray properties of the LBAS sources reveals that the average GeV spectra of BL Lac objects are significantly harder than the spectra of FSRQs. No significant correlation between radio and peak gamma-ray fluxes is observed. Blazar log N - log S and luminosity functions are constructed to investigate the evolution of the different blazar classes, with positive evolution indicated for FSRQs but none for BLLacs. The contribution of LAT-blazars to the total extragalactic gamma-ray intensity is estimated.

Affiliated with

Also associated with

No associations

Rating

Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bright AGN Source List from the First Three Months of the Fermi Large Area Telescope All-Sky Survey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-19489