R
Roger Blandford
Researcher at Stanford University
Publications - 716
Citations - 97353
Roger Blandford is an academic researcher from Stanford University. The author has contributed to research in topics: Galaxy & Fermi Gamma-ray Space Telescope. The author has an hindex of 156, co-authored 704 publications receiving 90181 citations. Previous affiliations of Roger Blandford include SLAC National Accelerator Laboratory & Max Planck Society.
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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.
Journal ArticleDOI
Constraining Dark Matter Models from a Combined Analysis of Milky Way Satellites with the Fermi Large Area Telescope
Markus Ackermann,Marco Ajello,Andrea Albert,W. B. Atwood,Luca Baldini,Jean Ballet,Guido Barbiellini,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,Roger Blandford,E. D. Bloom,Emanuele Bonamente,A. W. Borgland,Johan Bregeon,M. Brigida,P. Bruel,R. Buehler,T. H. Burnett,S. Buson,G. A. Caliandro,R. A. Cameron,B. Canadas,P. A. Caraveo,J. M. Casandjian,C. Cecchi,E. Charles,A. Chekhtman,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,L. Falletti,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,Yasushi Fukazawa,Stefan Funk,P. Fusco,F. Gargano,Dario Gasparrini,N. Gehrels,S. Germani,Nicola Giglietto,F. Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,I. A. Grenier,Sylvain Guiriec,Mats Gustafsson,Daniela Hadasch,M. Hayashida,M. Hayashida,E. Hays,R. E. Hughes,Tesla E. Jeltema,Gudlaugur Johannesson,R. P. Johnson,A. S. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Jürgen Knödlseder,M. Kuss,J. Lande,Luca Latronico,Andrea Lionetto,M. Llena Garde,Francesco Longo,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,Grzegorz Madejski,M. N. Mazziotta,Julie McEnery,Julie McEnery,J. Mehault,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,M. Naumann-Godo,Jay P. Norris,E. Nuss,T. Ohsugi,Akira Okumura,Nicola Omodei,E. Orlando,Jonathan F. Ormes,M. Ozaki,David Paneque,David Paneque,D. Parent,D. Parent,Melissa Pesce-Rollins,M. Pierbattista,F. Piron,G. Pivato,T. A. Porter,Stefano Profumo,S. Rainò,M. Razzano,A. Reimer,A. Reimer,Olaf Reimer,Olaf Reimer,Steven Ritz,M. Roth,Hartmut Sadrozinski,Carla Sbarra,Jeffrey D. Scargle,T. Schalk,Carmelo Sgrò,E. J. Siskind,Gloria Spandre,P. Spinelli,Louis E. Strigari,D. J. Suson,H. Tajima,H. Tajima,Hiromitsu Takahashi,Takaaki Tanaka,J. G. Thayer,J. B. Thayer,D. J. Thompson,L. Tibaldo,M. Tinivella,Diego F. Torres,Eleonora Troja,Yasunobu Uchiyama,Justin Vandenbroucke,V. Vasileiou,Giacomo Vianello,V. Vitale,A. P. Waite,Paul J. Wang,Brian L Winer,K. S. Wood,Matthew Wood,Zhenwei Yang,Stephan Zimmer +156 more
TL;DR: This work presents a search for dark matter consisting of weakly interacting massive particles, applying a joint likelihood analysis to 10 satellite galaxies with 24 months of data of the Fermi Large Area Telescope, and is able to rule out models with the most generic cross section, using gamma rays.
Journal ArticleDOI
Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived from First-Year Fermi Large Area Telescope Data
A. A. Abdo,A. A. Abdo,Markus Ackermann,Marco Ajello,W. B. Atwood,Luca Baldini,Jean Ballet,Guido Barbiellini,Denis Bastieri,B. M. Baughman,Keith Bechtol,Ronaldo Bellazzini,B. Berenji,Roger Blandford,E. D. Bloom,Emanuele Bonamente,A. W. Borgland,Johan Bregeon,A. Brez,M. Brigida,P. Bruel,T. H. Burnett,S. Buson,G. A. Caliandro,R. A. Cameron,P. A. Caraveo,J. M. Casandjian,E. Cavazzuti,C. Cecchi,Ö. Çelik,Ö. Çelik,E. Charles,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,S. Cutini,Charles D. Dermer,A. De Angelis,F. de Palma,Seth Digel,G. Di Bernardo,E. Do Couto E Silva,Persis S. Drell,Alex Drlica-Wagner,Richard Dubois,D. Dumora,D. Dumora,C. Farnier,C. Favuzzi,S. J. Fegan,W. B. Focke,P. Fortin,Marco Frailis,Yasushi Fukazawa,Stefan Funk,P. Fusco,Daniele Gaggero,F. Gargano,Dario Gasparrini,Neil Gehrels,Neil Gehrels,Neil Gehrels,S. Germani,B. Giebels,Nicola Giglietto,Paolo Giommi,F. Giordano,T. Glanzman,G. Godfrey,I. A. Grenier,M.-H. Grondin,M.-H. Grondin,J. E. Grove,L. Guillemot,Sylvain Guiriec,Michael Gustafsson,Y. Hanabata,Alice K. Harding,M. Hayashida,R. E. Hughes,Ryosuke Itoh,Miranda Jackson,Miranda Jackson,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,M. L. Kocian,F. Kuehn,M. Kuss,J. Lande,Luca Latronico,Marianne Lemoine-Goumard,Marianne Lemoine-Goumard,Francesco Longo,F. Loparco,Benoit Lott,Benoit Lott,M. N. Lovellette,P. Lubrano,Grzegorz Madejski,A. Makeev,A. Makeev,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,P. L. Nolan,J. P. Norris,E. Nuss,T. Ohsugi,Nicola Omodei,E. Orlando,Jonathan F. Ormes,David Paneque,J. H. Panetta,D. Parent,D. Parent,V. Pelassa,M. Pepe,Melissa Pesce-Rollins,F. Piron,T. A. Porter,S. Rainò,Riccardo Rando,M. Razzano,A. Reimer,A. Reimer,Olaf Reimer,Olaf Reimer,T. Reposeur,T. Reposeur,Steven Ritz,L.S. Rochester,A. Y. Rodriguez,M. Roth,Felix Ryde,Felix Ryde,H. F.W. Sadrozinski,David Sánchez,A. Sander,P. M. Saz Parkinson,Jeffrey D. Scargle,A. Sellerholm,Carmelo Sgrò,M. S. Shaw,E. J. Siskind,David A. Smith,David A. Smith,P. D. Smith,Gloria Spandre,P. Spinelli,Jean-Luc Starck,M. S. Strickman,Andrew W. Strong,D. J. Suson,H. Tajima,Hiromitsu Takahashi,Tadayuki Takahashi,Takaaki Tanaka,J. B. Thayer,J. G. Thayer,D. J. Thompson,L. Tibaldo,Diego F. Torres,Gino Tosti,A. Tramacere,Yasunobu Uchiyama,T. L. Usher,V. Vasileiou,V. Vasileiou,N. Vilchez,V. Vitale,A. P. Waite,Paul J. Wang,Brian L Winer,K. S. Wood,T. Ylinen,T. Ylinen,T. Ylinen,M. Ziegler +208 more
TL;DR: The first Fermi Large Area Telescope measurements of the so-called "extragalactic" diffuse gamma-ray emission (EGB) are reported, finding the spectrum is featureless, less intense, and softer than that derived from EGRET data.
Journal ArticleDOI
The fermi large area telescope on orbit: Event classification, instrument response functions, and calibration
Markus Ackermann,Marco Ajello,Andrea Albert,Alice Allafort,W. B. Atwood,Magnus Axelsson,Magnus Axelsson,Luca Baldini,Jean Ballet,Guido Barbiellini,Guido Barbiellini,Denis Bastieri,Denis Bastieri,Keith Bechtol,Ronaldo Bellazzini,Elisabetta Bissaldi,Roger Blandford,E. D. Bloom,J. R. Bogart,Emanuele Bonamente,Emanuele Bonamente,A. W. Borgland,Eugenio Bottacini,A. Bouvier,Terri Brandt,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,Claudia Cecchi,Claudia Cecchi,Omer Celik,Omer Celik,Eric Charles,R. C. G. Chaves,A. Chekhtman,C. C. Cheung,James Chiang,Stefano Ciprini,Stefano Ciprini,R. Claus,Johann Cohen-Tanugi,Jan Conrad,R. H. D. Corbet,R. H. D. Corbet,S. Cutini,F. D'Ammando,F. D'Ammando,David S. Davis,David S. Davis,A. De Angelis,M. Deklotz,F. de Palma,F. de Palma,Charles D. Dermer,Seth Digel,E. Do Couto E Silva,Persis S. Drell,Alex Drlica-Wagner,R. Dubois,C. Favuzzi,C. Favuzzi,S. J. Fegan,Elizabeth C. Ferrara,W. B. Focke,P. Fortin,Yasushi Fukazawa,Stefan Funk,P. Fusco,P. Fusco,F. Gargano,Dario Gasparrini,N. Gehrels,B. Giebels,Nicola Giglietto,Nicola Giglietto,Francesco Giordano,Francesco Giordano,Marcello Giroletti,T. Glanzman,G. Godfrey,I. A. Grenier,J. E. Grove,Sylvain Guiriec,Daniela Hadasch,M. Hayashida,M. Hayashida,E. Hays,D. Horan,X. Hou,R. E. Hughes,Miranda Jackson,Miranda Jackson,T. Jogler,Gudlaugur Johannesson,R. P. Johnson,Tyrel J. Johnson,W. N. Johnson,T. Kamae,Hideaki Katagiri,Jun Kataoka,Matthew Kerr,Jürgen Knödlseder,Jürgen Knödlseder,M. Kuss,J. Lande,S. Larsson,Luca Latronico,Claudia Lavalley,Marianne Lemoine-Goumard,Francesco Longo,Francesco Longo,F. Loparco,F. Loparco,Benoit Lott,M. N. Lovellette,P. Lubrano,P. Lubrano,M. N. Mazziotta,W. McConville,W. McConville,Julie McEnery,Julie McEnery,J. Mehault,Peter F. Michelson,W. Mitthumsiri,Tsunefumi Mizuno,Alexander Moiseev,Alexander Moiseev,C. Monte,C. Monte,M. E. Monzani,A. Morselli,Igor V. Moskalenko,S. Murgia,M. Naumann-Godo,Rodrigo Nemmen,Sho Nishino,Jay P. Norris,E. Nuss,Masanori Ohno,T. Ohsugi,Akira Okumura,Akira Okumura,Nicola Omodei,M. Orienti,E. Orlando,Jonathan F. Ormes,David Paneque,David Paneque,J. H. Panetta,J. S. Perkins,Melissa Pesce-Rollins,M. Pierbattista,F. Piron,G. Pivato,T. A. Porter,Judith Racusin,S. Rainò,S. Rainò,Riccardo Rando,Riccardo Rando,M. Razzano,M. Razzano,Soebur Razzaque,A. Reimer,Olaf Reimer,T. Reposeur,L. C. Reyes,Steven Ritz,L. S. Rochester,C. Romoli,M. Roth,Hartmut Sadrozinski,Daniel Sánchez,P. M. Saz Parkinson,Carla Sbarra,Jeffrey D. Scargle,Carmelo Sgrò,Jennifer M. Siegal-Gaskins,E. J. Siskind,Gloria Spandre,P. Spinelli,P. Spinelli,T. E. Stephens,T. E. Stephens,D. J. Suson,Hiroyasu Tajima,Hiroyasu Tajima,Hiromitsu Takahashi,Takaaki Tanaka,J. G. Thayer,J. B. Thayer,D. J. Thompson,L. Tibaldo,L. Tibaldo,M. Tinivella,Gino Tosti,Gino Tosti,Eleonora Troja,T. L. Usher,Justin Vandenbroucke,B. van Klaveren,V. Vasileiou,Giacomo Vianello,V. Vitale,V. Vitale,A. P. Waite,E. Wallace,Brian L Winer,D. L. Wood,K. S. Wood,Matthew Wood,Z. Yang,Stephan Zimmer +223 more
TL;DR: The Fermi Large Area Telescope (Fermi-LAT, hereafter LAT), the primary instrument on the FermI Gamma-ray Space Telescope (fermi) mission, is an imaging, wide field-of-view, high-energy \gamma-ray telescope, covering the energy range from 20 MeV to more than 300 GeV as discussed by the authors.