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The Fermi All-Sky Variability Analysis: A List of Flaring Gamma-Ray Sources and the Search for Transients in our GalaxyIn this paper, we present the Fermi All-sky Variability Analysis (FAVA), a tool to systematically study the variability of the gamma-ray sky measured by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope.For each direction on the sky, FAVA compares the number of gamma-rays observed in a given time window to the number of gamma-rays expected for the average emission detected from that direction. This method is used in weekly time intervals to derive a list of 215 flaring gamma-ray sources. We proceed to discuss the 27 sources found at Galactic latitudes smaller than 10 and show that, despite their low latitudes, most of them are likely of extragalactic origin.
Document ID
20140010835
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1088/0004-637X/771/1/57
Authors
Ackermann, M. (Deutsches Elektronen-Synchrotron Zeuthen, Germany)
Ajello, M. (Universities Space Research Association Greenbelt, MD, United States)
Albert, A. (Ohio State Univ. Columbus, OH, United States)
Allafort, A. (Stanford Univ. Stanford, CA, United States)
Antolini, E. (Perugia Univ. Italy)
Baldini, L. (Pisa Univ. Italy)
Ballet, J. (CEA Saclay, Service d'Astrophysique Gif-sur-Yvette, France)
Barbiellini, G (Istituto Nazionale di Fisica Nucleare Trieste, Italy)
Bastieri, D. (Istituto Nazionale di Fisica Nucleare Padova, Italy)
Bechtol, K. (Stanford Univ. Stanford, CA, United States)
Bellazzini, R. (Istituto Nazionale di Fisica Nucleare Pisa, Italy)
Blandford, R. D. (Stanford Univ. Stanford, CA, United States)
Bloom, E. D. (Stanford Univ. Stanford, CA, United States)
Brandt, T. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ferrara, E. C. (Maryland Univ. College Park, MD, United States)
Guiriec, S. (Maryland Univ. College Park, MD, United States)
Harding, A. K. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hays, E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Hewitt, J. (Maryland Univ. Baltimore County Baltimore, MD, United States)
McEnery, J. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Nemmen, R. (Maryland Univ. Baltimore County Baltimore, MD, United States)
Perkins, J. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Scargle, J. D (NASA Ames Research Center Moffett Field, CA, United States)
Thompson, D. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Troja, E. (Maryland Univ. College Park, MD, United States)
Date Acquired
August 19, 2014
Publication Date
July 1, 2013
Publication Information
Publication: The Astrophysical Journal
Publisher: The American Astronomical Society.
Volume: 771
Issue: 1
ISSN: 0004-637X
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN11301
Funding Number(s)
CONTRACT_GRANT: NNG06EO90A
Distribution Limits
Public
Copyright
Public Use Permitted.
Keywords
ANALYSIS
FERMI ALL-SKY
VARIABILITY

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