J
Jonathan F. Ormes
Researcher at University of Denver
Publications - 319
Citations - 28323
Jonathan F. Ormes is an academic researcher from University of Denver. The author has contributed to research in topics: Cosmic ray & Fermi Gamma-ray Space Telescope. The author has an hindex of 89, co-authored 306 publications receiving 27022 citations. Previous affiliations of Jonathan F. Ormes include Institut de Ciències de l'Espai & University of Minnesota.
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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.
Journal ArticleDOI
The Advanced Composition Explorer
E. C. Stone,A. M. Frandsen,R. A. Mewaldt,E. R. Christian,D. Margolies,Jonathan F. Ormes,F. Snow +6 more
TL;DR: The Advanced Composition Explorer (ACE) as mentioned in this paper was launched in 1997 with six high-resolution spectrometers that measured the elemental, isotopic, and ionic charge-state composition of nuclei from H to Ni (1≤Z≤28) from solar wind energies (∼1 keV nucl−1) to galactic cosmic-ray energies ( ∼1.5 million km sunward of Earth).
Journal ArticleDOI
The spectral energy distribution of fermi bright blazars
A. A. Abdo,A. A. Abdo,Markus Ackermann,Ivan Agudo,Marco Ajello,Hugh D. Aller,Margo F. Aller,Emmanouil Angelakis,A. A. Arkharov,Magnus Axelsson,Magnus Axelsson,Uwe Bach,Luca Baldini,Jean Ballet,Guido Barbiellini,Denis Bastieri,B. M. Baughman,Keith Bechtol,Ronaldo Bellazzini,Erika Benítez,Andrei Berdyugin,B. Berenji,Roger Blandford,E. D. Bloom,Markus Boettcher,Emanuele Bonamente,A. W. Borgland,Johan Bregeon,A. Brez,M. Brigida,P. Bruel,T. H. Burnett,David N. Burrows,S. Buson,G. A. Caliandro,L. Calzoletti,R. A. Cameron,M. Capalbi,P. A. Caraveo,D. Carosati,J. M. Casandjian,E. Cavazzuti,C. Cecchi,Omer Celik,Omer Celik,E. Charles,Sylvain Chaty,A. Chekhtman,A. Chekhtman,Wen Ping Chen,James Chiang,G. Chincarini,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,S. Colafrancesco,L. R. Cominsky,Jan Conrad,Jan Conrad,L. Costamante,S. Cutini,F. D'Ammando,R. Deitrick,V. D'Elia,Charles D. Dermer,A. De Angelis,F. de Palma,Seth Digel,I. Donnarumma,E. Do Couto E Silva,Persis S. Drell,R. Dubois,Deborah Dultzin,D. Dumora,A. D. Falcone,C. Farnier,C. Favuzzi,S. J. Fegan,W. B. Focke,E. Forné,P. Fortin,Marco Frailis,Lars Fuhrmann,Yasushi Fukazawa,Stefan Funk,P. Fusco,José L. Gómez,F. Gargano,Dario Gasparrini,Neil Gehrels,S. Germani,B. Giebels,Nicola Giglietto,Paolo Giommi,F. Giordano,A. Giuliani,T. Glanzman,G. Godfrey,I. A. Grenier,Caryl Gronwall,J. E. Grove,L. Guillemot,L. Guillemot,Sylvain Guiriec,Mark Gurwell,D. Hadasch,Y. Hanabata,Alice K. Harding,M. Hayashida,E. Hays,S. E. Healey,Jochen Heidt,David Hiriart,D. Horan,E. A. Hoversten,R. E. Hughes,Ryosuke Itoh,Miranda Jackson,Miranda Jackson,Gudlaugur Johannesson,A. S. Johnson,W. N. Johnson,Svetlana G. Jorstad,Matthias Kadler,T. Kamae,Hideaki Katagiri,Jun Kataoka,Nobuyuki Kawai,J. A. Kennea,Matthew Kerr,Givi N. Kimeridze,Jürgen Knödlseder,M. L. Kocian,E. N. Kopatskaya,Ekaterina Koptelova,Tatiana S. Konstantinova,Yuri Y. Kovalev,Yu. A. Kovalev,Omar M. Kurtanidze,M. Kuss,J. Lande,Valeri M. Larionov,Luca Latronico,Paolo Leto,Elina Lindfors,Francesco Longo,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,Grzegorz Madejski,A. Makeev,A. Makeev,P. Marchegiani,Alan P. Marscher,F. E. Marshall,Walter Max-Moerbeck,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,C. Meurer,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,I. Nestoras,K. Nilsson,N. A. Nizhelsky,P. L. Nolan,J. P. Norris,E. Nuss,T. Ohsugi,Roopesh Ojha,Nicola Omodei,E. Orlando,Jonathan F. Ormes,J. P. Osborne,M. Ozaki,L. Pacciani,Paolo Padovani,C. Pagani,K. L. Page,David Paneque,J. H. Panetta,D. Parent,M. Pasanen,Vasiliki Pavlidou,V. Pelassa,M. Pepe,M. Perri,Melissa Pesce-Rollins,S. Piranomonte,F. Piron,C. Pittori,T. A. Porter,Simonetta Puccetti,Farid Rahoui,S. Rainò,C. M. Raiteri,Robert R. Rando,M. Razzano,A. Reimer,A. Reimer,Olaf Reimer,Olaf Reimer,T. Reposeur,Joseph L. Richards,Steven Ritz,L.S. Rochester,A. Y. Rodriguez,Roger W. Romani,J. A. Ros,M. Roth,P. Roustazadeh,Felix Ryde,Felix Ryde,H. F.W. Sadrozinski,A. C. Sadun,David Sánchez,A. Sander,P. M. Saz Parkinson,Jeffrey D. Scargle,A. Sellerholm,Carmelo Sgrò,M. S. Shaw,Lorand A. Sigua,E. J. Siskind,David A. Smith,P. D. Smith,Gloria Spandre,P. Spinelli,Jean-Luc Starck,Mark Stevenson,G. Stratta,M. S. Strickman,D. J. Suson,H. Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,L. O. Takalo,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,Diego F. Torres,Gino Tosti,A. Tramacere,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,V. Vasileiou,V. Vasileiou,F. Verrecchia,N. Vilchez,M. Villata,V. Vitale,A. P. Waite,Paul J. Wang,Brian L Winer,K. S. Wood,T. Ylinen,T. Ylinen,J. A. Zensus,G. V. Zhekanis,M. Ziegler +273 more
Abstract: We have conducted a detailed investigation of the broadband spectral properties of the gamma-ray selected blazars of the Fermi LAT Bright AGN Sample (LBAS). By combining our accurately estimated Fermi gamma-ray spectra with Swift, radio, infra-red, optical, and other hard X-ray/gamma-ray data, collected within 3 months of the LBAS data taking period, we were able to assemble high-quality and quasi-simultaneous spectral energy distributions (SED) for 48 LBAS blazars. The SED of these gamma-ray sources is similar to that of blazars discovered at other wavelengths, clearly showing, in the usual log nu-log nu F-nu representation, the typical broadband spectral signatures normally attributed to a combination of low-energy synchrotron radiation followed by inverse Compton emission of one or more components. We have used these SED to characterize the peak intensity of both the low-and the high-energy components. The results have been used to derive empirical relationships that estimate the position of the two peaks from the broadband colors (i.e., the radio to optical, alpha(ro), and optical to X-ray, alpha(ox), spectral slopes) and from the gamma-ray spectral index. Our data show that the synchrotron peak frequency (nu(S)(peak)) is positioned between 10(12.5) and 10(14.5) Hz in broad-lined flat spectrum radio quasars (FSRQs) and between 10(13) and 10(17) Hz in featureless BL Lacertae objects. We find that the gamma-ray spectral slope is strongly correlated with the synchrotron peak energy and with the X-ray spectral index, as expected at first order in synchrotron-inverse Compton scenarios. However, simple homogeneous, one-zone, synchrotron self-Compton (SSC) models cannot explain most of our SED, especially in the case of FSRQs and low energy peaked (LBL) BL Lacs. More complex models involving external Compton radiation or multiple SSC components are required to reproduce the overall SED and the observed spectral variability. While more than 50% of known radio bright high energy peaked (HBL) BL Lacs are detected in the LBAS sample, only less than 13% of known bright FSRQs and LBL BL Lacs are included. This suggests that the latter sources, as a class, may be much fainter gamma-ray emitters than LBAS blazars, and could in fact radiate close to the expectations of simple SSC models. We categorized all our sources according to a new physical classification scheme based on the generally accepted paradigm for Active Galactic Nuclei and on the results of this SED study. Since the LAT detector is more sensitive to flat spectrum gamma-ray sources, the correlation between nu(S)(peak) and gamma-ray spectral index strongly favors the detection of high energy peaked blazars, thus explaining the Fermi overabundance of this type of sources compared to radio and EGRET samples. This selection effect is similar to that experienced in the soft X-ray band where HBL BL Lacs are the dominant type of blazars.
Journal ArticleDOI
Fermi Observations of High-Energy Gamma-Ray Emission from GRB 080916C
Markus Ackermann,Marco Ajello,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Matthew G. Baring,Denis Bastieri,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,P. N. Bhat,Elisabetta Bissaldi,Roger Blandford,Emanuele Bonamente,Emanuele Bonamente,A. W. Borgland,A. Bouvier,Johan Bregeon,Alessandro Brez,Michael S. Briggs,M. Brigida,M. Brigida,P. Bruel,R. Buehler,S. Buson,S. Buson,G. A. Caliandro,R. A. Cameron,P. A. Caraveo,S. Carrigan,J. M. Casandjian,C. Cecchi,C. Cecchi,Omer Celik,Omer Celik,Eric Charles,A. Chekhtman,A. Chekhtman,J. Chiang,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Valerie Connaughton,J. Conrad,J. Conrad,S. Cutini,C. D. Dermer,A. De Angelis,F. de Palma,F. de Palma,Seth Digel,E. Do Couto E Silva,Persis S. Drell,R. Dubois,C. Favuzzi,C. Favuzzi,Stephen Fegan,Elizabeth C. Ferrara,M. Frailis,Yasushi Fukazawa,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,Neil Gehrels,S. Germani,S. Germani,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,F. Giordano,F. Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,Jonathan Granot,I. A. Grenier,J. E. Grove,L. Guillemot,L. Guillemot,L. Guillemot,Sylvain Guiriec,D. Hadasch,E. Hays,D. Horan,R. E. Hughes,Gudlaugur Johannesson,A. S. Johnson,W. N. Johnson,T. Kamae,Hideaki Katagiri,R. M. Kippen,Jürgen Knödlseder,D. Kocevski,M. Kuss,J. Lande,L. Latronico,Shiu-Hang Lee,M. Llena Garde,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,M. N. Lovellette,P. Lubrano,P. Lubrano,A. Makeev,A. Makeev,M. N. Mazziotta,S. McBreen,S. McBreen,Julie McEnery,Julie McEnery,S. McGlynn,S. McGlynn,Charles A. Meegan,J. Mehault,Peter Mészáros,Peter F. Michelson,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,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,Atsushi Okumura,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,W. S. Paciesas,David Paneque,J. H. Panetta,D. Parent,D. Parent,V. Pelassa,M. Pepe,M. Pepe,Melissa Pesce-Rollins,Vahé Petrosian,F. Piron,T. A. Porter,Robert D. Preece,Judith Racusin,S. Rainò,S. Rainò,Robert R. Rando,Robert R. Rando,Arne Rau,M. Razzano,Soebur Razzaque,Soebur Razzaque,A. Reimer,Olaf Reimer,J. Ripken,M. Roth,Felix Ryde,Felix Ryde,Hartmut Sadrozinski,A. Sander,Jeffrey D. Scargle,T. L. Schalk,Carmelo Sgrò,E. J. Siskind,P. D. Smith,Gloria Spandre,P. Spinelli,P. Spinelli,Michael Stamatikos,Michael Stamatikos,M. S. Strickman,D. J. Suson,Hiroyasu Tajima,Hiromitsu Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,L. Tibaldo,Diego F. Torres,Diego F. Torres,Gino Tosti,Gino Tosti,A. Tramacere,T. Uehara,T. L. Usher,Justin Vandenbroucke,A. J. van der Horst,V. Vasileiou,V. Vasileiou,N. Vilchez,V. Vitale,V. Vitale,A. von Kienlin,A. P. Waite,P. Wang,Colleen A. Wilson-Hodge,B. L. Winer,Kent S. Wood,Xue-Feng Wu,Xue-Feng Wu,Ryo Yamazaki,Zhenwei Yang,T. Ylinen,T. Ylinen,M. Ziegler +219 more
TL;DR: The Gamma-ray Burst Monitor and Large Area Telescope onboard the Fermi Observatory together record GRBs over a broad energy range spanning about 7 decades of gammaray energy, with the largest apparent energy release yet measured.
Journal ArticleDOI
Measurement of Separate Cosmic-Ray Electron and Positron Spectra with the Fermi Large Area Telescope
Markus Ackermann,Marco Ajello,Alice Allafort,W. B. Atwood,Luca Baldini,Guido Barbiellini,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,Roger Blandford,E. D. Bloom,Emanuele Bonamente,A. W. Borgland,A. Bouvier,Johan Bregeon,M. Brigida,P. Bruel,R. Buehler,S. Buson,G. A. Caliandro,R. A. Cameron,P. A. Caraveo,J. M. Casandjian,C. Cecchi,E. Charles,A. Chekhtman,C. C. Cheung,C. C. Cheung,James Chiang,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,S. Cutini,A. De Angelis,F. de Palma,Charles D. Dermer,Seth Digel,E. Do Couto E Silva,Persis S. Drell,Alex Drlica-Wagner,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,W. B. Focke,P. Fortin,Yasushi Fukazawa,Stefan Funk,P. Fusco,F. Gargano,Dario Gasparrini,S. Germani,Nicola Giglietto,Paolo Giommi,F. Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,Isabelle Grenier,J. E. Grove,Sylvain Guiriec,Mats Gustafsson,D. Hadasch,Alice K. Harding,M. Hayashida,M. Hayashida,R. E. Hughes,Gudlaugur Johannesson,A. S. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Jürgen Knödlseder,M. Kuss,J. Lande,Luca Latronico,Marianne Lemoine-Goumard,M. Llena Garde,Francesco Longo,F. Loparco,M. N. Lovellette,P. Lubrano,Grzegorz Madejski,M. N. Mazziotta,Julie McEnery,Julie McEnery,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,Alexander Moiseev,Alexander Moiseev,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,Takeshi Nakamori,P. L. Nolan,Jay P. Norris,E. Nuss,Masanori Ohno,T. Ohsugi,Akira Okumura,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,David Paneque,David Paneque,D. Parent,Melissa Pesce-Rollins,M. Pierbattista,F. Piron,G. Pivato,T. A. Porter,S. Rainò,Riccardo Rando,M. Razzano,Soebur Razzaque,Soebur Razzaque,A. Reimer,A. Reimer,Olaf Reimer,Olaf Reimer,T. Reposeur,Steven Ritz,Roger W. Romani,M. Roth,Hartmut Sadrozinski,Carla Sbarra,T. Schalk,Carmelo Sgrò,E. J. Siskind,Gloria Spandre,P. Spinelli,Andrew W. Strong,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. G. Thayer,J. B. Thayer,Luigi Tibaldo,M. Tinivella,Diego F. Torres,Gino Tosti,Eleonora Troja,Yasunobu Uchiyama,T. L. Usher,Justin Vandenbroucke,V. Vasileiou,Giacomo Vianello,V. Vitale,A. P. Waite,Brian L Winer,K. S. Wood,Matthew Wood,Z. Yang,Stephan Zimmer +158 more
TL;DR: The Fermi Large Area Telescope measured separate cosmic-ray electron and positron spectra to distinguish the two species by exploiting Earth's shadow, and it is confirmed that the fraction rises with energy in the 20-100 GeV range.