Gamma-ray light curves and variability of bright fermi-detected blazars
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,Elisa Antolini,Elisa Antolini,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,Roger Blandford,Elliott D. Bloom,Emanuele Bonamente,Emanuele Bonamente,A. W. Borgland,A. Bouvier,J. Bregeon,Alessandro Brez,M. Brigida,M. Brigida,Pascal Bruel,R. Buehler,T. H. Burnett,S. Buson,G. A. Caliandro,R. A. Cameron,P. A. Caraveo,S. Carrigan,J. M. Casandjian,E. Cavazzuti,Claudia Cecchi,Claudia Cecchi,Omer Celik,Omer Celik,A. Chekhtman,A. Chekhtman,C. C. Cheung,C. C. Cheung,James Chiang,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,L. R. Cominsky,Jan Conrad,Jan Conrad,L. Costamante,S. Cutini,Charles D. Dermer,A. De Angelis,F. de Palma,F. de Palma,E. Do Couto E Silva,Persis S. Drell,R. Dubois,D. Dumora,D. Dumora,Christian Farnier,C. Favuzzi,C. Favuzzi,Stephen Fegan,W. B. Focke,P. Fortin,M. Frailis,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,N. Gehrels,S. Germani,S. Germani,B. Giebels,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,Francesco Giordano,Francesco Giordano,T. Glanzman,G. Godfrey,I. A. Grenier,M.-H. Grondin,M.-H. Grondin,J. E. Grove,Sylvain Guiriec,D. Hadasch,M. Hayashida,E. Hays,S. E. Healey,D. Horan,R. E. Hughes,Ryosuke Itoh,Gudlaugur Johannesson,A. S. Johnson,W. N. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,N. Kawai,Jürgen Knödlseder,M. Kuss,J. Lande,S. Larsson,Luca Latronico,Marianne Lemoine-Goumard,Marianne Lemoine-Goumard,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,Benoit Lott,Benoit Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,G. M. Madejski,A. Makeev,A. Makeev,Enrico Massaro,M. N. Mazziotta,Julie McEnery,Julie McEnery,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,M. Mueller,S. Murgia,P. L. Nolan,J. P. Norris,E. Nuss,Masanori Ohno,T. Ohsugi,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,J. H. Panetta,D. Parent,V. Pelassa,M. Pepe,M. Pepe,Melissa Pesce-Rollins,F. Piron,T. A. Porter,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,M. Razzano,A. Reimer,Olaf Reimer,Steven Ritz,A. Y. Rodriguez,Roger W. Romani,M. Roth,Felix Ryde,Felix Ryde,Hartmut Sadrozinski,A. Sander,Jeffrey D. Scargle,Carmelo Sgrò,M. S. Shaw,P. D. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,Jean-Luc Starck,M. S. Strickman,D. J. Suson,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,Diego F. Torres,Diego F. Torres,G. Tosti,G. Tosti,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,V. Vasileiou,V. Vasileiou,N. Vilchez,V. Vitale,V. Vitale,A. P. Waite,E. Wallace,P. Wang,Brian L Winer,K. S. Wood,Zhenwei Yang,T. Ylinen,T. Ylinen,M. Ziegler +208 more
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In this article, the authors present light curves as well as the first systematic characterization of variability of the 106 objects in the high-confidence Fermi Large Area Telescope Bright AGN Sample (LBAS) weekly light curves of this sample, obtained during the first 11 months of the FERi survey (2008 August 4-2009 July 4), are tested for variability and their properties are quantified through autocorrelation function and structure function analysis.Abstract:
This paper presents light curves as well as the first systematic characterization of variability of the 106 objects in the high-confidence Fermi Large Area Telescope Bright AGN Sample (LBAS) Weekly light curves of this sample, obtained during the first 11 months of the Fermi survey (2008 August 4–2009 July 4), are tested for variability and their properties are quantified through autocorrelation function and structure function analysis For the brightest sources, 3 or 4 day binned light curves are extracted in order to determine power density spectra (PDSs) and to fit the temporal structure of major flares More than 50% of the sources are found to be variable with high significance, where high states do not exceed 1/4 of the total observation range Variation amplitudes are larger for flat spectrum radio quasars and low/intermediate synchrotron frequency peaked BL Lac objects Autocorrelation timescales derived from weekly light curves vary from four to a dozen of weeks Variable sources of the sample have weekly and 3–4 day bin light curves that can be described by 1/f α PDS, and show two kinds of gamma-ray variability: (1) rather constant baseline with sporadic flaring activity characterized by flatter PDS slopes resembling flickering and red noise with occasional intermittence and (2)—measured for a few blazars showing strong activity—complex and structured temporal profiles characterized by long-term memory and steeper PDS slopes, reflecting a random walk underlying mechanism The average slope of the PDS of the brightest 22 FSRQs and of the 6 brightest BL Lacs is 15 and 17, respectively The study of temporal profiles of well-resolved flares observed in the 10 brightest LBAS sources shows that they generally have symmetric profiles and that their total duration vary between 10 and 100 days Results presented here can assist in source class recognition for unidentified sources and can serve as reference for more detailed analysis of the brightest gamma-ray blazarsread more
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Journal ArticleDOI
The second catalog of active galactic nuclei detected by the Fermi Large Area Telescope
Markus Ackermann,Marco Ajello,Alice Allafort,Elisa Antolini,Elisa Antolini,W. B. Atwood,Magnus Axelsson,Magnus Axelsson,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,Roger Blandford,E. D. Bloom,Emanuele Bonamente,Emanuele Bonamente,A. W. Borgland,Eugenio Bottacini,A. Bouvier,Johan Bregeon,M. Brigida,M. Brigida,P. Bruel,R. Buehler,T. H. Burnett,S. Buson,S. Buson,G. A. Caliandro,R. A. Cameron,P. A. Caraveo,J. M. Casandjian,E. Cavazzuti,C. Cecchi,C. Cecchi,Eric Charles,C. C. Cheung,C. C. Cheung,James Chiang,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,Jan Conrad,L. Costamante,S. Cutini,A. De Angelis,F. de Palma,F. de Palma,Charles D. Dermer,Seth Digel,E. Do Couto E Silva,Persis S. Drell,R. Dubois,L. Escande,C. Favuzzi,C. Favuzzi,Stephen Fegan,Elizabeth C. Ferrara,Justin D. Finke,W. B. Focke,P. Fortin,M. Frailis,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,Neil Gehrels,S. Germani,S. Germani,B. Giebels,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,F. Giordano,F. Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,I. A. Grenier,J. E. Grove,Sylvain Guiriec,Mats Gustafsson,Daniela Hadasch,M. Hayashida,M. Hayashida,E. Hays,S. E. Healey,D. Horan,Xian Hou,R. E. Hughes,G. Iafrate,Gudlaugur Johannesson,A. S. Johnson,W. N. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Jürgen Knödlseder,Jürgen Knödlseder,M. Kuss,J. Lande,S. Larsson,Luca Latronico,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,G. M. Madejski,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,C. Monte,M. E. Monzani,E. Moretti,E. Moretti,A. Morselli,Igor V. Moskalenko,S. Murgia,Takeshi Nakamori,M. Naumann-Godo,P. L. Nolan,Jay P. Norris,E. Nuss,M. Ohno,T. Ohsugi,Akira Okumura,Nicola Omodei,M. Orienti,E. Orlando,J. F. Ormes,M. Ozaki,David Paneque,David Paneque,D. Parent,D. Parent,Melissa Pesce-Rollins,M. Pierbattista,Silvia Piranomonte,F. Piron,G. Pivato,T. A. Porter,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,M. Razzano,M. Razzano,Soebur Razzaque,A. Reimer,Olaf Reimer,Steven Ritz,L. S. Rochester,Roger W. Romani,M. Roth,Daniel Sánchez,C. Sbarra,Jeffrey D. Scargle,T. L. Schalk,Carmelo Sgrò,M. S. Shaw,E. J. Siskind,Gloria Spandre,P. Spinelli,P. Spinelli,Andrew W. Strong,D. J. Suson,Hiroyasu Tajima,Hiroyasu Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. G. Thayer,J. B. Thayer,D. J. Thompson,L. Tibaldo,L. Tibaldo,M. Tinivella,Diego F. Torres,Diego F. Torres,Gino Tosti,Gino Tosti,Eleonora Troja,Yasunobu Uchiyama,Justin Vandenbroucke,V. Vasileiou,Giacomo Vianello,V. Vitale,V. Vitale,A. P. Waite,E. Wallace,P. Wang,Brian L Winer,D. L. Wood,D. L. Wood,K. S. Wood,Stephan Zimmer +214 more
TL;DR: The second catalog of active galactic nuclei (AGNs) detected by the Fermi Large Area Telescope (LAT) in two years of scientific operation is presented in this article, which includes 1017 γ-ray sources located at high Galactic latitudes (|b| > 10°) that are detected with a test statistic (TS) greater than 25 and associated statistically with AGNs.
Journal ArticleDOI
The Swift-BAT Hard X-ray Transient Monitor
H. A. Krimm,H. A. Krimm,Stephen T. Holland,Stephen T. Holland,Robin H. D. Corbet,Robin H. D. Corbet,Aaron B. Pearlman,Aaron B. Pearlman,Aaron B. Pearlman,P. Romano,J. A. Kennea,Joshua S. Bloom,S. D. Barthelmy,W. H. Baumgartner,W. H. Baumgartner,J. Cummings,J. Cummings,Neil Gehrels,A. Y. Lien,Craig B. Markwardt,David Palmer,T. Sakamoto,Michael Stamatikos,T. N. Ukwatta,T. N. Ukwatta +24 more
TL;DR: The Swift/Burst Alert Telescope (BAT) provides near real-time coverage of the X-ray sky in the energy range 15-50 keV with a detection sensitivity of 5.3 mCrab for a full-day observation and a time resolution as fine as 64 s as mentioned in this paper.
Journal ArticleDOI
The Luminosity Function of Fermi-Detected Flat-Spectrum Radio Quasars
Marco Ajello,M. S. Shaw,Roger W. Romani,Charles D. Dermer,L. Costamante,O. G. King,Walter Max-Moerbeck,Anthony C. S. Readhead,A. Reimer,Joseph L. Richards,Matthew A. Stevenson +10 more
TL;DR: In this paper, the authors used a complete sample of flat spectrum radio quasars (FSRQs) detected during the first year of operation to determine the luminosity function (LF) and its evolution with cosmic time.
Journal ArticleDOI
Fermi Gamma-ray Space Telescope observations of the gamma-ray outburst from 3C454.3 in November 2010
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,Alice Allafort,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,Ronaldo Bellazzini,B. Berenji,Roger Blandford,Elliott D. Bloom,Emanuele Bonamente,Emanuele Bonamente,A. W. Borgland,A. Bouvier,J. Bregeon,M. Brigida,M. Brigida,Pascal Bruel,R. Buehler,S. Buson,S. Buson,G. A. Caliandro,R. A. Cameron,P. A. Caraveo,J. M. Casandjian,E. Cavazzuti,Claudia Cecchi,Claudia Cecchi,Eric Charles,A. Chekhtman,C. C. Cheung,James Chiang,Stefano Ciprini,R. Claus,Jan Conrad,Jan Conrad,S. Cutini,Filippo D'Ammando,A. De Angelis,F. de Palma,F. de Palma,Charles D. Dermer,Seth Digel,E. Do Couto E Silva,Persis S. Drell,R. Dubois,D. Dumora,L. Escande,L. Escande,C. Favuzzi,C. Favuzzi,Stephen Fegan,Elizabeth C. Ferrara,P. Fortin,Yasushi Fukazawa,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,N. Gehrels,S. Germani,S. Germani,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,Francesco Giordano,Francesco Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,I. A. Grenier,J. E. Grove,Sylvain Guiriec,Daniela Hadasch,M. Hayashida,E. Hays,D. Horan,Ryosuke Itoh,Gudlaugur Johannesson,A. S. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Jürgen Knödlseder,Jürgen Knödlseder,M. Kuss,J. Lande,S. Larsson,Luca Latronico,Shiu-Hang Lee,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,G. M. Madejski,A. Makeev,A. Makeev,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,M. Naumann-Godo,Sho Nishino,P. L. Nolan,J. P. Norris,E. Nuss,T. Ohsugi,Atsushi Okumura,E. Orlando,J. F. Ormes,David Paneque,David Paneque,V. Pelassa,Melissa Pesce-Rollins,M. Pierbattista,F. Piron,T. A. Porter,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,Soebur Razzaque,Soebur Razzaque,A. Reimer,Olaf Reimer,Steven Ritz,M. Roth,Hartmut Sadrozinski,David Sanchez,Jeffrey D. Scargle,T. L. Schalk,Carmelo Sgrò,E. J. Siskind,P. D. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,M. S. Strickman,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,Yasuyuki T. Tanaka,J. G. Thayer,J. B. Thayer,D. J. Thompson,L. Tibaldo,Diego F. Torres,Diego F. Torres,G. Tosti,G. Tosti,A. Tramacere,Eleonora Troja,Justin Vandenbroucke,V. Vasileiou,Giacomo Vianello,N. Vilchez,N. Vilchez,V. Vitale,V. Vitale,A. P. Waite,P. Wang,Brian L Winer,K. S. Wood,Zhenwei Yang,M. Ziegler +185 more
TL;DR: The flat-spectrum radio quasar 3C454.3 underwent an extraordinary 5-day γ-ray outburst in 2010 November when the daily flux measured with the Fermi Large Area Telescope (LAT) at photon energies E > 100 MeV reached (66 ± 2) × 10−6 photons cm−2 s−1, which is a factor of three higher than its previous maximum flux recorded in 2009 December and 5 times brighter than the Vela pulsar as mentioned in this paper.
Journal ArticleDOI
A Multimessenger Picture of the Flaring Blazar TXS 0506+056: Implications for High-energy Neutrino Emission and Cosmic-Ray Acceleration
Azadeh Keivani,Kohta Murase,Maria Petropoulou,Derek B. Fox,S. B. Cenko,S. B. Cenko,Sylvain Chaty,Alexis Coleiro,Alexis Coleiro,J. J. DeLaunay,Stavros Dimitrakoudis,Phil Evans,J. A. Kennea,Frank Marshall,Apostolos Mastichiadis,J. P. Osborne,Marcos Santander,A. Tohuvavohu,C. F. Turley +18 more
TL;DR: In this paper, a comprehensive analysis of TXS-0506+056 during its flaring state, using newly collected Swift, NuSTAR, and X-shooter data with Fermi observations and numerical models to constrain the blazar's particle acceleration processes and multimessenger (electromagnetic and high-energy neutrino) emissions.
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The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
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TL;DR: The Large Area Telescope (Fermi/LAT) as mentioned in this paper is the primary instrument on the Fermi Gamma-ray Space Telescope, which is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering the energy range from below 20 MeV to more than 300 GeV.
Journal ArticleDOI
The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
TL;DR: The Large Area Telescope (Fermi/LAT) as discussed by the authors is the primary instrument on the Fermi Gamma-ray Space Telescope, which is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering the energy range from below 20 MeV to more than 300 GeV.
Journal ArticleDOI
Fermi large area telescope first source catalog
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,Alice Allafort,Elisa Antolini,Elisa Antolini,W. B. Atwood,Magnus Axelsson,Magnus Axelsson,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,B. M. Baughman,Keith Bechtol,Ronaldo Bellazzini,F. Belli,F. Belli,B. Berenji,Dario Bisello,Dario Bisello,Roger Blandford,E. D. Bloom,Emanuele Bonamente,Emanuele Bonamente,J. Bonnell,J. Bonnell,A. W. Borgland,A. Bouvier,Johan Bregeon,Alessandro Brez,M. Brigida,M. Brigida,P. Bruel,T. H. Burnett,G. Busetto,G. Busetto,S. Buson,S. Buson,G. A. Caliandro,R. A. Cameron,Riccardo Campana,B. Canadas,B. Canadas,P. A. Caraveo,S. Carrigan,J. M. Casandjian,E. Cavazzuti,M. Ceccanti,C. Cecchi,C. Cecchi,Omer Celik,Omer Celik,Eric Charles,A. Chekhtman,A. Chekhtman,C. C. Cheung,C. C. Cheung,James Chiang,A. N. Cillis,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,Jan Conrad,R. H. D. Corbet,R. H. D. Corbet,David S. Davis,David S. Davis,M. Deklotz,P. R. den Hartog,Charles D. Dermer,A. De Angelis,A. De Luca,F. de Palma,F. de Palma,Seth Digel,M. Dormody,E. Do Couto E Silva,Persis S. Drell,R. Dubois,D. Dumora,D. Fabiani,C. Farnier,C. Favuzzi,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,W. B. Focke,P. Fortin,M. Frailis,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,Neil Gehrels,S. Germani,S. Germani,Gianluca Giavitto,Gianluca Giavitto,B. Giebels,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,F. Giordano,F. Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,I. A. Grenier,M.-H. Grondin,M.-H. Grondin,J. E. Grove,L. Guillemot,Sylvain Guiriec,Mats Gustafsson,D. Hadasch,Y. Hanabata,Alice K. Harding,M. Hayashida,E. Hays,S. E. Healey,A. B. Hill,D. Horan,R. E. Hughes,G. Iafrate,Gudlaugur Johannesson,A. S. Johnson,R. P. Johnson,Tyrel J. Johnson,Tyrel J. Johnson,W. N. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Nobuyuki Kawai,Matthew Kerr,Jürgen Knödlseder,D. Kocevski,M. Kuss,J. Lande,D. Landriu,Luca Latronico,Shiu-Hang Lee,M. Lemoine-Goumard,Andrea Lionetto,Andrea Lionetto,M. Llena Garde,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,B. Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,G. M. Madejski,A. Makeev,A. Makeev,B. Marangelli,B. Marangelli,M. Marelli,Enrico Massaro,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,Peter F. Michelson,Massimo Minuti,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,M. Mongelli,C. Monte,C. Monte,M. E. Monzani,Elena Moretti,Elena Moretti,A. Morselli,Igor V. Moskalenko,S. Murgia,Hiroshi Nakajima,Takeshi Nakamori,M. Naumann-Godo,P. L. Nolan,J. P. Norris,E. Nuss,Masanori Ohno,T. Ohsugi,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,Alessandro Paccagnella,Alessandro Paccagnella,David Paneque,J. H. Panetta,D. Parent,D. Parent,V. Pelassa,M. Pepe,M. Pepe,Melissa Pesce-Rollins,Michele Pinchera,F. Piron,T. A. Porter,L. Poupard,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,Paul S. Ray,M. Razzano,Soebur Razzaque,Soebur Razzaque,Nanda Rea,A. Reimer,Olaf Reimer,T. Reposeur,Joachim Ripken,Steven Ritz,L. S. Rochester,A. Y. Rodriguez,Roger W. Romani,M. Roth,Hartmut Sadrozinski,David Salvetti,David Sánchez,A. Sander,P. M. Saz Parkinson,Jeffrey D. Scargle,T. L. Schalk,G. Scolieri,Carmelo Sgrò,M. S. Shaw,E. J. Siskind,David S. Smith,P. D. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,Jean-Luc Starck,T. E. Stephens,T. E. Stephens,E. Striani,E. Striani,M. S. Strickman,Andrew W. Strong,D. J. Suson,Hiroyasu Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,O. Tibolla,F. Tinebra,Diego F. Torres,Diego F. Torres,Gino Tosti,Gino Tosti,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,A. Van Etten,V. Vasileiou,V. Vasileiou,N. Vilchez,V. Vitale,V. Vitale,A. P. Waite,E. Wallace,P. Wang,K. Watters,Brian L Winer,Kent S. Wood,Zhenwei Yang,T. Ylinen,T. Ylinen,M. Ziegler +288 more
TL;DR: The first Fermi-LAT catalog (1FGL) as mentioned in this paper contains 1451 sources detected and characterized in the 100 MeV to 100 GeV range, and the threshold likelihood Test Statistic is 25, corresponding to a significance of just over 4 sigma.
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