Systematic and quantitative approach for the identification of high energy gamma-ray source populations

Details Systematic and quantitative approach for the identification of high energy gamma-ray source populations Systematic and quantitative approach for the identification of high energy gamma-ray source populations

2005-07-27

arxiv.org/abs/astro-ph/0507654v1

Astrophys.J.629:L141,2005

Astronomy and Astrophysics

Astrophysics

In press in The Astrophysical Journal Letters. Accepted on July 12, 2005

Scientific paper

10.1086/447765

A large fraction of the detections to be made by the Gamma-ray Large Area Space Telescope (GLAST) will initially be unidentified. We argue that traditional methodological approaches to identify individuals and/or populations of $\gamma$-ray sources will encounter procedural limitations. These limitations will hamper our ability to classify source populations lying in the anticipated dataset with the required degree of confidence, particularly those for which no member has yet been convincingly detected in the predecessor experiment EGRET. Here we suggest a new paradigm for achieving the classification of $\gamma$-ray source populations based on the implementation of an a priori protocol to search for theoretically-motivated candidate sources. In order to protect the discovery potential of the sample, it is essential that such paradigm will be defined before the data is unblinded. Key to the new procedure is a statistical assessment by which the discovery of a new population can be claimed. Although we explicitly refer here to the case of GLAST, the scheme we present may be adapted to other experiments confronted with a similar problematic.

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