E
E. Troja
Researcher at Goddard Space Flight Center
Publications - 167
Citations - 4142
E. Troja is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Gamma-ray burst & Fermi Gamma-ray Space Telescope. The author has an hindex of 31, co-authored 167 publications receiving 3617 citations. Previous affiliations of E. Troja include University of Maryland, College Park.
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Journal ArticleDOI
Discovery of the Onset of Rapid Accretion by a Dormant Massive Black Hole
D. N. Burrows,F. E. Marshall,Stephen T. Holland,Mike Eracleous,Hitoshi Negoro,T. Sakamoto,V. Mangano,M. M. Chester,H.-I. Sung,Bing Zhang,K. Y. Huang,Peter Mészáros,A. A. Breeveld,D. Fugazza,P. Giommi,Sergio Campana,E. Troja,B. Sbarufatti,G. Cusumano,Yoshihiro Ueda,R. H. D. Corbet,A. P. Beardmore,J. P. Osborne,Stefano Covino,A. D. Falcone,N. Kawai,M. Sugizaki,Y.-B. Jeon,M. Perri,Kazuo Hiroi,A. Melandri,S. D. Barthelmy,G. Tagliaferri,V. D'Elia,Paolo Esposito,G. L. Israel,J. S. Perkins,Jonathan Gelbord,Myungshin Im,P. Romano,L. A. Antonelli,J. R. Cummings,J. L. Racusin,P. A. Evans,M. H. Siegel,Ryuichi Usui,H. A. Krimm,J. A. Kennea,Wonsun Park,K. L. Page,Yuji Urata,Y. B. Jeon,Nicola Omodei,P. D'Avanzo,Gabriele Ghisellini,N. Gehrels +55 more
TL;DR: In this paper, the authors reported the first discovery of the onset of a relativistic accretion-powered jet in the new extragalactic transient, Swift J164449.3+573451.
Journal ArticleDOI
GeV Observations of Star-forming Galaxies with \textit{Fermi} LAT
Markus Ackermann,Marco Ajello,Alice Allafort,Luca Baldini,J. Ballet,Denis Bastieri,Keith Bechtol,R. Bellazzini,B. Berenji,Elliott D. Bloom,Emanuele Bonamente,A. W. Borgland,A. Bouvier,J. Bregeon,M. Brigida,P. Bruel,R. Buehler,Sara Buson,G. A. Caliandro,R. A. Cameron,P. Caraveo,J. M. Casandjian,Claudia Cecchi,E. Charles,A. Chekhtman,C. C. Cheung,James Chiang,A. N. Cillis,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,S. Cutini,F. de Palma,Charles D. Dermer,S. W. Digel,E. Do Couto E Silva,P. S. Drell,Alex Drlica-Wagner,C. Favuzzi,S. J. Fegan,P. Fortin,Yasushi Fukazawa,Seb. Funk,P. Fusco,F. Gargano,D. Gasparrini,S. Germani,Nicola Giglietto,Francesco Giordano,T. Glanzman,G.L. Godfrey,I. A. Grenier,Sylvain Guiriec,Mats Gustafsson,Daniela Hadasch,M. Hayashida,E. Hays,R. E. Hughes,G. Jóhannesson,A. S. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Jürgen Knödlseder,M. Kuss,J. Lande,Francesco Longo,F. Loparco,B. Lott,M. N. Lovellette,P. Lubrano,G. M. Madejski,Pierrick Martin,M. N. Mazziotta,Julie McEnery,P. F. Michelson,T. Mizuno,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,Sho Nishino,J. P. Norris,E. Nuss,Masanori Ohno,T. Ohsugi,Atsushi Okumura,Nicola Omodei,E. Orlando,M. Ozaki,D. Parent,Massimo Persic,Melissa Pesce-Rollins,Vahé Petrosian,M. Pierbattista,F. Piron,G. Pivato,T. A. Porter,S. Rainò,R. Rando,M. Razzano,A. Reimer,Olaf Reimer,Steven Ritz,Markus Roth,Carla Sbarra,Carmelo Sgrò,E. J. Siskind,Gloria Spandre,P. Spinelli,{L}ukasz Stawarz,Andrew W. Strong,Hiromitsu Takahashi,Takaaki Tanaka,J. B. Thayer,L. Tibaldo,M. Tinivella,Diego F. Torres,G. Tosti,E. Troja,Y. Uchiyama,Justin Vandenbroucke,Giacomo Vianello,V. Vitale,A. P. Waite,Matthew J.A. Wood,Zhenwei Yang +128 more
TL;DR: In this paper, the authors examined a sample of 69 dwarf, spiral, and luminous and ultraluminous infrared galaxies at photon energies 0.1-100 GeV using 3 years of data collected by the Large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope (\textit{Fermi}).
Journal ArticleDOI
MINUTE-TIMESCALE >100 MeV γ-RAY VARIABILITY during the GIANT OUTBURST of QUASAR 3C 279 OBSERVED by FERMI-LAT in 2015 June
Markus Ackermann,Richard Anantua,Katsuaki Asano,Luca Baldini,Luca Baldini,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,J. Becerra González,J. Becerra González,Ronaldo Bellazzini,Elisabetta Bissaldi,Roger Blandford,Elliott D. Bloom,R. Bonino,R. Bonino,Eugenio Bottacini,P. Bruel,R. Buehler,G. A. Caliandro,R. A. Cameron,M. Caragiulo,M. Caragiulo,P. A. Caraveo,E. Cavazzuti,Claudia Cecchi,C. C. Cheung,James Chiang,G. Chiaro,Stefano Ciprini,Stefano Ciprini,Johann Cohen-Tanugi,F. Costanza,S. Cutini,S. Cutini,Filippo D'Ammando,Filippo D'Ammando,F. de Palma,R. Desiante,R. Desiante,Seth Digel,N. Di Lalla,M. Di Mauro,L. Di Venere,L. Di Venere,Persis S. Drell,C. Favuzzi,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,Yasushi Fukazawa,S. Funk,P. Fusco,F. Gargano,Dario Gasparrini,Dario Gasparrini,Nicola Giglietto,Nicola Giglietto,Francesco Giordano,Francesco Giordano,Marcello Giroletti,I. A. Grenier,I. A. Grenier,Lucas Guillemot,Sylvain Guiriec,M. Hayashida,E. Hays,D. Horan,G. Jóhannesson,S. Kensei,Daniel Kocevski,M. Kuss,G. La Mura,Stefan Larsson,Luca Latronico,J. Li,Francesco Longo,Francesco Longo,F. Loparco,B. Lott,M. N. Lovellette,P. Lubrano,G. M. Madejski,J. D. Magill,S. Maldera,Alberto Manfreda,M. Mayer,Mn Mazziotta,P. F. Michelson,Nestor Mirabal,Tsunefumi Mizuno,M. E. Monzani,A. Morselli,Igor V. Moskalenko,Krzysztof Nalewajko,Matteo Negro,Matteo Negro,E. Nuss,T. Ohsugi,E. Orlando,David Paneque,David Paneque,J. S. Perkins,Melissa Pesce-Rollins,Melissa Pesce-Rollins,F. Piron,G. Pivato,T. A. Porter,Giacomo Principe,Riccardo Rando,Riccardo Rando,M. Razzano,Soebur Razzaque,A. Reimer,Jeffrey D. Scargle,Carmelo Sgrò,M. Sikora,D. Simone,E. J. Siskind,F. Spada,P. Spinelli,Lukasz Stawarz,J. B. Thayer,D. J. Thompson,Diego F. Torres,Diego F. Torres,E. Troja,E. Troja,Yasunobu Uchiyama,Yajie Yuan,Shanta M. Zimmer +131 more
TL;DR: In this article, the authors observed minute-scale variability suggests a very compact emission region at hundreds of Schwarzschild radii from the central engine in conical jet models, where a minimum bulk jet Lorentz factor of 35 is necessary to avoid both internal gamma-ray absorption and super-Eddington jet power.
Journal ArticleDOI
The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope
Marco Ajello,R. Angioni,R. Angioni,Magnus Axelsson,Magnus Axelsson,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,J. Becerra González,Ronaldo Bellazzini,Elisabetta Bissaldi,Elisabetta Bissaldi,Elliott D. Bloom,R. Bonino,R. Bonino,Eugenio Bottacini,Eugenio Bottacini,P. Bruel,S. Buson,Fabio Cafardo,R. A. Cameron,E. Cavazzuti,Sina Chen,Sina Chen,C. C. Cheung,Stefano Ciprini,Stefano Ciprini,D. Costantin,S. Cutini,Filippo D'Ammando,P. de la Torre Luque,R. de Menezes,R. de Menezes,F. de Palma,Abhishek Desai,N. Di Lalla,L. Di Venere,L. Di Venere,Aaron Dominguez,F. Fana Dirirsa,Elizabeth C. Ferrara,Justin D. Finke,Anna Franckowiak,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,S. Garrappa,Dario Gasparrini,Dario Gasparrini,Nicola Giglietto,Nicola Giglietto,Francesco Giordano,Francesco Giordano,Marcello Giroletti,David A. Green,I. A. Grenier,Sylvain Guiriec,Sylvain Guiriec,S. Harita,E. Hays,D. Horan,R. Itoh,G. Jóhannesson,G. Jóhannesson,Miloš Kovačević,Felicia Krauss,Michael Kreter,Michael Kreter,M. Kuss,Stefan Larsson,Stefan Larsson,Stefan Larsson,C. Leto,J. Li,Ioannis Liodakis,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,B. Lott,M. N. Lovellette,P. Lubrano,G. M. Madejski,S. Maldera,Alberto Manfreda,G. Martí-Devesa,Francesco Massaro,Francesco Massaro,Mn Mazziotta,I. Mereu,I. Mereu,Manuel Meyer,Giulia Migliori,Nestor Mirabal,Nestor Mirabal,Tsunefumi Mizuno,M. E. Monzani,A. Morselli,Igor V. Moskalenko,M. Negro,M. Negro,Rodrigo Nemmen,E. Nuss,L. S. Ojha,Roopesh Ojha,Nicola Omodei,M. Orienti,E. Orlando,E. Orlando,J. F. Ormes,Vaidehi S. Paliya,Z. Pei,H. A. Peña-Herazo,Massimo Persic,Melissa Pesce-Rollins,Leonid Petrov,F. Piron,H. Poon,Giacomo Principe,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,Bindu Rani,Bindu Rani,M. Razzano,Soebur Razzaque,A. Reimer,Olaf Reimer,Frank K. Schinzel,Frank K. Schinzel,D. Serini,Carmelo Sgrò,E. J. Siskind,Gloria Spandre,P. Spinelli,P. Spinelli,D. J. Suson,Yutaro Tachibana,D. J. Thompson,Diego F. Torres,Eleonora Torresi,E. Troja,E. Troja,J. Valverde,P. van Zyl,P. van Zyl,M. Yassine,M. Yassine +152 more
TL;DR: The 4LAC catalog of active galactic nuclei (AGNs) detected by the Fermi Gamma-ray Space Telescope Large Area Telescope (4LAC) between 2008 August 4 and 2016 August 2 contains 2863 objects located at high Galactic latitudes (|b|>10°deg}).
Journal ArticleDOI
Resolving the Extragalactic γ-Ray Background above 50 GeV with the Fermi Large Area Telescope.
Markus Ackermann,Marco Ajello,Andrea Albert,W. B. Atwood,Luca Baldini,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,Elisabetta Bissaldi,Roger Blandford,Elliott D. Bloom,R. Bonino,R. Bonino,Johan Bregeon,R. J. Britto,P. Bruel,R. Buehler,G. A. Caliandro,R. A. Cameron,M. Caragiulo,M. Caragiulo,P. A. Caraveo,E. Cavazzuti,Claudia Cecchi,Claudia Cecchi,Eric Charles,A. Chekhtman,James Chiang,G. Chiaro,Stefano Ciprini,Stefano Ciprini,Johann Cohen-Tanugi,L. R. Cominsky,F. Costanza,S. Cutini,S. Cutini,S. Cutini,Filippo D'Ammando,Filippo D'Ammando,A. De Angelis,F. de Palma,R. Desiante,R. Desiante,Seth Digel,M. Di Mauro,L. Di Venere,L. Di Venere,Aaron Dominguez,Persis S. Drell,C. Favuzzi,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,A. Franckowiak,Yasushi Fukazawa,Seb. Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,Dario Gasparrini,Nicola Giglietto,Nicola Giglietto,Paolo Giommi,Francesco Giordano,Francesco Giordano,Marcello Giroletti,G. Godfrey,David H. Green,David H. Green,I. A. Grenier,Sylvain Guiriec,E. Hays,D. Horan,G. Iafrate,T. Jogler,G. Jóhannesson,M. Kuss,G. La Mura,Stefan Larsson,Stefan Larsson,Luca Latronico,Jingcheng Li,Liang Li,Liang Li,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,G. M. Madejski,J. D. Magill,S. Maldera,Alberto Manfreda,M. Mayer,Mn Mazziotta,Peter F. Michelson,Warit Mitthumsiri,Tsunefumi Mizuno,A. A. Moiseev,A. A. Moiseev,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,Matteo Negro,Matteo Negro,E. Nuss,T. Ohsugi,C. Okada,Nicola Omodei,E. Orlando,J. F. Ormes,David Paneque,David Paneque,J. S. Perkins,Melissa Pesce-Rollins,Melissa Pesce-Rollins,Vahé Petrosian,F. Piron,G. Pivato,T. A. Porter,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,M. Razzano,Soebur Razzaque,A. Reimer,Olaf Reimer,T. Reposeur,Roger W. Romani,Miguel A. Sánchez-Conde,J. Schmid,André Schulz,Carmelo Sgrò,D. Simone,E. J. Siskind,F. Spada,Gloria Spandre,P. Spinelli,P. Spinelli,D. J. Suson,Hiromitsu Takahashi,J. B. Thayer,L. Tibaldo,Diego F. Torres,Diego F. Torres,E. Troja,E. Troja,Giacomo Vianello,M. Yassine,Stephan Zimmer +160 more
TL;DR: This work measures, for the first time, the source count distribution, dN/dS, of extragalactic γ-ray sources at E>50 GeV and finds that it is compatible with a Euclidean distribution down to the lowest measured source flux in the 2FHL.