A New Paradigm for Identification of Classes of High Energy Gamma-Ray Sources

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A large fraction of the expected number of source detections of the forthcoming observatory Gamma-ray Large Area Space Telescope (GLAST) will be initially unidentified. We argue that traditional methodological approaches to identify individual detections and/or populations of gamma-ray sources present procedural limitations. These limitations will hamper our ability to classify the populations lying in the anticipated dataset with the required degree of confidence, in particular for those for which no member has yet been detected convincingly with the predecessor experiment EGRET. Here we suggest a new paradigm for achieving the classification of gamma-ray source populations that is based on implementing ... continued below

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Torres, D F & Reimer, O April 8, 2005.

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A large fraction of the expected number of source detections of the forthcoming observatory Gamma-ray Large Area Space Telescope (GLAST) will be initially unidentified. We argue that traditional methodological approaches to identify individual detections and/or populations of gamma-ray sources present procedural limitations. These limitations will hamper our ability to classify the populations lying in the anticipated dataset with the required degree of confidence, in particular for those for which no member has yet been detected convincingly with the predecessor experiment EGRET. Here we suggest a new paradigm for achieving the classification of gamma-ray source populations that is based on implementing an a priori protocol to search for theoretically-motivated candidates. It is essential that such paradigm will be defined before the data is unblinded, in order to protect the discovery potential of the sample. Key to the new procedure is a quantitative assessment of the confidence level by which new populations can be claimed to have been discovered. When needed, small number statistics is applied for population studies in gamma-ray astronomy. Although we refer here explicitly only to the case of GLAST, the scheme we present can certainly be adapted to other experiments confronted with a similar combination of problems.

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PDF-file: 13 pages; size: 0.1 Mbytes

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  • Journal Name: Astrophysical Journal Letters; Journal Volume: 629; Journal Issue: 2 Pt. 2

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  • Report No.: UCRL-JRNL-211515
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 877744
  • Archival Resource Key: ark:/67531/metadc875424

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  • April 8, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Nov. 30, 2016, 12:57 p.m.

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Torres, D F & Reimer, O. A New Paradigm for Identification of Classes of High Energy Gamma-Ray Sources, article, April 8, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc875424/: accessed August 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.