Fermi observations of high-energy gamma-ray emission from GRB 090217A

M. Ackermann; M. Ajello; L. Baldini; J. Ballet; G. Barbiellini; M. G. Baring; D. Bastieri; K. Bechtol; R. Bellazzini; B. Berenji; P. N. Bhat; E. Bissaldi; R. D. Blandford; E. Bonamente; A. W. Borgland; A. Bouvier; J. Bregeon; A. Brez; M. S. Briggs; M. Brigida; P. Bruel; R. Buehler; S. Buson; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; S. Carrigan; J. M. Casandjian; C. Cecchi; Ö Çelik; E. Charles; A. Chekhtman; J. Chiang; S. Ciprini; R. Claus; J. Cohen-Tanugi; V. Connaughton; J. Conrad; S. Cutini; C. D. Dermer; A. De Angelis; F. De Palma; S. W. Digel; E. Do Couto E Silva; P. S. Drell; R. Dubois; C. Favuzzi; S. J. Fegan; E. C. Ferrara; M. Frailis; Y. Fukazawa; P. Fusco; F. Gargano; D. Gasparrini; N. Gehrels; S. Germani; N. Giglietto; P. Giommi; F. Giordano; M. Giroletti; T. Glanzman; G. Godfrey; J. Granot; I. A. Grenier; J. E. Grove; L. Guillemot; S. Guiriec; D. Hadasch; E. Hays; D. Horan; R. E. Hughes; G. Jóhannesson; A. S. Johnson; W. N. Johnson; T. Kamae; H. Katagiri; R. M. Kippen; J. Knödlseder; D. Kocevski; M. Kuss; J. Lande; L. Latronico; S. H. Lee; M. Llena Garde; F. Longo; F. Loparco; M. N. Lovellette; P. Lubrano; A. Makeev; M. N. Mazziotta; S. McBreen; J. E. McEnery; S. McGlynn; C. Meegan; J. Mehault; P. Mészros; P. F. Michelson; T. Mizuno; A. A. Moiseev; C. Monte; M. E. Monzani; E. Moretti; A. Morselli; I. V. Moskalenko; S. Murgia; H. Nakajima; T. Nakamori; M. Naumann-Godo; P. L. Nolan; J. P. Norris; E. Nuss; M. Ohno; T. Ohsugi; A. Okumura; N. Omodei; E. Orlando; J. F. Ormes; M. Ozaki; W. S. Paciesas; D. Paneque; J. H. Panetta; D. Parent; V. Pelassa; M. Pepe; M. Pesce-Rollins; V. Petrosian; F. Piron; T. A. Porter; R. Preece; J. L. Racusin; S. Rainò; R. Rando; A. Rau; M. Razzano; S. Razzaque; A. Reimer; O. Reimer; J. Ripken; M. Roth; F. Ryde; H. F.W. Sadrozinski; A. Sander; J. D. Scargle; T. L. Schalk; C. Sgrò; E. J. Siskind; P. D. Smith; G. Spandre; P. Spinelli; M. Stamatikos; M. S. Strickman; D. J. Suson; H. Tajima; H. Takahashi; T. Tanaka; J. B. Thayer; J. G. Thayer; L. Tibaldo; D. F. Torres; G. Tosti; A. Tramacere; T. Uehara; T. L. Usher; J. Vandenbroucke; A. J. Van Der Horst; V. Vasileiou; N. Vilchez; V. Vitale; A. Von Kienlin; A. P. Waite; P. Wang; C. Wilson-Hodge; B. L. Winer; K. S. Wood; X. F. Wu; R. Yamazaki; Z. Yang; T. Ylinen; M. Ziegler

doi:10.1088/2041-8205/717/2/L127

Fermi observations of high-energy gamma-ray emission from GRB 090217A

M. Ackermann
, M. Ajello
, L. Baldini
, J. Ballet
, G. Barbiellini
, M. G. Baring
, D. Bastieri
, K. Bechtol
, R. Bellazzini
, B. Berenji
, P. N. Bhat
, E. Bissaldi
, R. D. Blandford
, E. Bonamente
, A. W. Borgland
, A. Bouvier
, J. Bregeon
, A. Brez
, M. S. Briggs
, M. Brigida

P. Bruel, R. Buehler, S. Buson, G. A. Caliandro, R. A. Cameron, P. A. Caraveo, S. Carrigan, J. M. Casandjian, C. Cecchi, Ö Çelik, E. Charles, A. Chekhtman, J. Chiang, S. Ciprini, R. Claus, J. Cohen-Tanugi, V. Connaughton, J. Conrad, S. Cutini, C. D. Dermer, A. De Angelis, F. De Palma, S. W. Digel, E. Do Couto E Silva, P. S. Drell, R. Dubois, C. Favuzzi, S. J. Fegan, E. C. Ferrara, M. Frailis, Y. Fukazawa, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, P. Giommi, F. Giordano, M. Giroletti, T. Glanzman, G. Godfrey, J. Granot, I. A. Grenier, J. E. Grove, L. Guillemot, S. Guiriec, D. Hadasch, E. Hays, D. Horan, R. E. Hughes, G. Jóhannesson, A. S. Johnson, W. N. Johnson, T. Kamae, H. Katagiri, R. M. Kippen, J. Knödlseder, D. Kocevski, M. Kuss, J. Lande, L. Latronico, S. H. Lee, M. Llena Garde, F. Longo, F. Loparco, M. N. Lovellette, P. Lubrano, A. Makeev, M. N. Mazziotta, S. McBreen, J. E. McEnery, S. McGlynn, C. Meegan, J. Mehault, P. Mészros, P. F. Michelson, T. Mizuno, A. A. Moiseev, C. Monte, M. E. Monzani, E. Moretti, A. Morselli, I. V. Moskalenko, S. Murgia, H. Nakajima, T. Nakamori, M. Naumann-Godo, P. L. Nolan, J. P. Norris, E. Nuss, M. Ohno, T. Ohsugi, A. Okumura, N. Omodei, E. Orlando, J. F. Ormes, M. Ozaki, W. S. Paciesas, D. Paneque, J. H. Panetta, D. Parent, V. Pelassa, M. Pepe, M. Pesce-Rollins, V. Petrosian, F. Piron, T. A. Porter, R. Preece, J. L. Racusin, S. Rainò, R. Rando, A. Rau, M. Razzano, S. Razzaque, A. Reimer, O. Reimer, J. Ripken, M. Roth, F. Ryde, H. F.W. Sadrozinski, A. Sander, J. D. Scargle, T. L. Schalk, C. Sgrò, E. J. Siskind, P. D. Smith, G. Spandre, P. Spinelli, M. Stamatikos, M. S. Strickman, D. J. Suson, H. Tajima, H. Takahashi, T. Tanaka, J. B. Thayer, J. G. Thayer, L. Tibaldo, D. F. Torres, G. Tosti, A. Tramacere, T. Uehara, T. L. Usher, J. Vandenbroucke, A. J. Van Der Horst, V. Vasileiou, N. Vilchez, V. Vitale, A. Von Kienlin, A. P. Waite, P. Wang, C. Wilson-Hodge, B. L. Winer, K. S. Wood, X. F. Wu, R. Yamazaki, Z. Yang, T. Ylinen, M. Ziegler

Stanford University
National Institute for Nuclear Physics
CEA-IRFU/CNRS/Université Paris Diderot
University of Trieste
Rice University
University of Padua
University of Alabama in Huntsville
Max Planck Institute for Extraterrestrial Physics
University of Perugia
Polytechnic University of Bari
École polytechnique
Autonomous University of Barcelona
Istituto di Astrofisica Spaziale e Fisica Cosmica di Bologna
NASA Goddard Space Flight Center
University of Maryland Baltimore County
Naval Research Laboratory
George Mason University
Université Montpellier 2
Stockholm University
Oskar Klein Centre
Italian Space Agency
University of Udine
Osservatorio Astronomico di Trieste
Hiroshima University
National Institute for Astrophysics
University of Hertfordshire
Max Planck Institute for Radio Astronomy
IN2P3 - Institut National de Physique Nucléaire et de Physique Des Particules
Université de Bordeaux
ICREA
Ohio State University
Los Alamos National Laboratory
CNRS
University College Dublin
University of Maryland
KTH Royal Institute of Technology
Universities Space Research Association
Pennsylvania State University
Tokyo Institute of Technology
Waseda University
University of Denver
JAXA Institute of Space and Astronautical Science
National Research Council
Innsbruck Medical University
University of Washington
University of California at Santa Cruz
NASA Ames Research Center
NYCB Real-Time Computing Inc.
Purdue University Northwest
Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
University of Geneva
NASA Marshall Space Flight Center
University of Rome Tor Vergata
Joint Center for Particle Nuclear Physics and Cosmology (J-CPNPC)
CAS - Purple Mountain Observatory
Aoyama Gakuin University
Linnaeus University

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

The Fermi observatory is advancing our knowledge of gamma-ray bursts (GRBs) through pioneering observations at high energies, covering more than seven decades in energy with the two on-board detectors, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). Here, we report on the observation of the long GRB 090217A which triggered the GBM and has been detected by the LAT with a significance greater than 9σ. We present the GBM and LAT observations and on-ground analyses, including the time-resolved spectra and the study of the temporal profile from 8 keV up to 1 GeV. All spectra are well reproduced by a Band model. We compare these observations to the first two LAT-detected, long bursts GRB 080825C and GRB 080916C. These bursts were found to have time-dependent spectra and exhibited a delayed onset of the high-energy emission, which are not observed in the case of GRB 090217A. We discuss some theoretical implications for the high-energy emission of GRBs.

Original language	English
Pages (from-to)	L127-L132
Journal	Astrophysical Journal Letters
Volume	717
Issue number	2 PART 2
DOIs	https://doi.org/10.1088/2041-8205/717/2/L127
Publication status	Published - 2010
Externally published	Yes

Keywords

gamma-ray burst: individual (GRB090217A)

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

Access to Document

10.1088/2041-8205/717/2/L127

Cite this

Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bhat, P. N., Bissaldi, E., Blandford, R. D., Bonamente, E., Borgland, A. W., Bouvier, A., Bregeon, J., Brez, A., Briggs, M. S., ... Ziegler, M. (2010). Fermi observations of high-energy gamma-ray emission from GRB 090217A. Astrophysical Journal Letters, 717(2 PART 2), L127-L132. https://doi.org/10.1088/2041-8205/717/2/L127

@article{3fa6fa62cc43498683ca59be64c7d66b,

title = "Fermi observations of high-energy gamma-ray emission from GRB 090217A",

abstract = "The Fermi observatory is advancing our knowledge of gamma-ray bursts (GRBs) through pioneering observations at high energies, covering more than seven decades in energy with the two on-board detectors, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). Here, we report on the observation of the long GRB 090217A which triggered the GBM and has been detected by the LAT with a significance greater than 9σ. We present the GBM and LAT observations and on-ground analyses, including the time-resolved spectra and the study of the temporal profile from 8 keV up to 1 GeV. All spectra are well reproduced by a Band model. We compare these observations to the first two LAT-detected, long bursts GRB 080825C and GRB 080916C. These bursts were found to have time-dependent spectra and exhibited a delayed onset of the high-energy emission, which are not observed in the case of GRB 090217A. We discuss some theoretical implications for the high-energy emission of GRBs.",

keywords = "gamma-ray burst: individual (GRB090217A)",

author = "M. Ackermann and M. Ajello and L. Baldini and J. Ballet and G. Barbiellini and Baring, \{M. G.\} and D. Bastieri and K. Bechtol and R. Bellazzini and B. Berenji and Bhat, \{P. N.\} and E. Bissaldi and Blandford, \{R. D.\} and E. Bonamente and Borgland, \{A. W.\} and A. Bouvier and J. Bregeon and A. Brez and Briggs, \{M. S.\} and M. Brigida and P. Bruel and R. Buehler and S. Buson and Caliandro, \{G. A.\} and Cameron, \{R. A.\} and Caraveo, \{P. A.\} and S. Carrigan and Casandjian, \{J. M.\} and C. Cecchi and {\"O} {\c C}elik and E. Charles and A. Chekhtman and J. Chiang and S. Ciprini and R. Claus and J. Cohen-Tanugi and V. Connaughton and J. Conrad and S. Cutini and Dermer, \{C. D.\} and \{De Angelis\}, A. and \{De Palma\}, F. and Digel, \{S. W.\} and \{Do Couto E Silva\}, E. and Drell, \{P. S.\} and R. Dubois and C. Favuzzi and Fegan, \{S. J.\} and Ferrara, \{E. C.\} and M. Frailis and Y. Fukazawa and P. Fusco and F. Gargano and D. Gasparrini and N. Gehrels and S. Germani and N. Giglietto and P. Giommi and F. Giordano and M. Giroletti and T. Glanzman and G. Godfrey and J. Granot and Grenier, \{I. A.\} and Grove, \{J. E.\} and L. Guillemot and S. Guiriec and D. Hadasch and E. Hays and D. Horan and Hughes, \{R. E.\} and G. J{\'o}hannesson and Johnson, \{A. S.\} and Johnson, \{W. N.\} and T. Kamae and H. Katagiri and Kippen, \{R. M.\} and J. Kn{\"o}dlseder and D. Kocevski and M. Kuss and J. Lande and L. Latronico and Lee, \{S. H.\} and Garde, \{M. Llena\} and F. Longo and F. Loparco and Lovellette, \{M. N.\} and P. Lubrano and A. Makeev and Mazziotta, \{M. N.\} and S. McBreen and McEnery, \{J. E.\} and S. McGlynn and C. Meegan and J. Mehault and P. M{\'e}szros and Michelson, \{P. F.\} and T. Mizuno and Moiseev, \{A. A.\} and C. Monte and Monzani, \{M. E.\} and E. Moretti and A. Morselli and Moskalenko, \{I. V.\} and S. Murgia and H. Nakajima and T. Nakamori and M. Naumann-Godo and Nolan, \{P. L.\} and Norris, \{J. P.\} and E. Nuss and M. Ohno and T. Ohsugi and A. Okumura and N. Omodei and E. Orlando and Ormes, \{J. F.\} and M. Ozaki and Paciesas, \{W. S.\} and D. Paneque and Panetta, \{J. H.\} and D. Parent and V. Pelassa and M. Pepe and M. Pesce-Rollins and V. Petrosian and F. Piron and Porter, \{T. A.\} and R. Preece and Racusin, \{J. L.\} and S. Rain{\`o} and R. Rando and A. Rau and M. Razzano and S. Razzaque and A. Reimer and O. Reimer and J. Ripken and M. Roth and F. Ryde and Sadrozinski, \{H. F.W.\} and A. Sander and Scargle, \{J. D.\} and Schalk, \{T. L.\} and C. Sgr{\`o} and Siskind, \{E. J.\} and Smith, \{P. D.\} and G. Spandre and P. Spinelli and M. Stamatikos and Strickman, \{M. S.\} and Suson, \{D. J.\} and H. Tajima and H. Takahashi and T. Tanaka and Thayer, \{J. B.\} and Thayer, \{J. G.\} and L. Tibaldo and Torres, \{D. F.\} and G. Tosti and A. Tramacere and T. Uehara and Usher, \{T. L.\} and J. Vandenbroucke and \{Van Der Horst\}, \{A. J.\} and V. Vasileiou and N. Vilchez and V. Vitale and \{Von Kienlin\}, A. and Waite, \{A. P.\} and P. Wang and C. Wilson-Hodge and Winer, \{B. L.\} and Wood, \{K. S.\} and Wu, \{X. F.\} and R. Yamazaki and Z. Yang and T. Ylinen and M. Ziegler",

year = "2010",

doi = "10.1088/2041-8205/717/2/L127",

language = "English",

volume = "717",

pages = "L127--L132",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2 PART 2",

}

Ackermann, M, Ajello, M, Baldini, L, Ballet, J, Barbiellini, G, Baring, MG, Bastieri, D, Bechtol, K, Bellazzini, R, Berenji, B, Bhat, PN, Bissaldi, E, Blandford, RD, Bonamente, E, Borgland, AW, Bouvier, A, Bregeon, J, Brez, A, Briggs, MS, Brigida, M, Bruel, P, Buehler, R, Buson, S, Caliandro, GA, Cameron, RA, Caraveo, PA, Carrigan, S, Casandjian, JM, Cecchi, C, Çelik, Ö, Charles, E, Chekhtman, A, Chiang, J, Ciprini, S, Claus, R, Cohen-Tanugi, J, Connaughton, V, Conrad, J, Cutini, S, Dermer, CD, De Angelis, A, De Palma, F, Digel, SW, Do Couto E Silva, E, Drell, PS, Dubois, R, Favuzzi, C, Fegan, SJ, Ferrara, EC, Frailis, M, Fukazawa, Y, Fusco, P, Gargano, F, Gasparrini, D, Gehrels, N, Germani, S, Giglietto, N, Giommi, P, Giordano, F, Giroletti, M, Glanzman, T, Godfrey, G, Granot, J, Grenier, IA, Grove, JE, Guillemot, L, Guiriec, S, Hadasch, D, Hays, E, Horan, D, Hughes, RE, Jóhannesson, G, Johnson, AS, Johnson, WN, Kamae, T, Katagiri, H, Kippen, RM, Knödlseder, J, Kocevski, D, Kuss, M, Lande, J, Latronico, L, Lee, SH, Garde, ML, Longo, F, Loparco, F, Lovellette, MN, Lubrano, P, Makeev, A, Mazziotta, MN, McBreen, S, McEnery, JE, McGlynn, S, Meegan, C, Mehault, J, Mészros, P, Michelson, PF, Mizuno, T, Moiseev, AA, Monte, C, Monzani, ME, Moretti, E, Morselli, A, Moskalenko, IV, Murgia, S, Nakajima, H, Nakamori, T, Naumann-Godo, M, Nolan, PL, Norris, JP, Nuss, E, Ohno, M, Ohsugi, T, Okumura, A, Omodei, N, Orlando, E, Ormes, JF, Ozaki, M, Paciesas, WS, Paneque, D, Panetta, JH, Parent, D, Pelassa, V, Pepe, M, Pesce-Rollins, M, Petrosian, V, Piron, F, Porter, TA, Preece, R, Racusin, JL, Rainò, S, Rando, R, Rau, A, Razzano, M, Razzaque, S, Reimer, A, Reimer, O, Ripken, J, Roth, M, Ryde, F, Sadrozinski, HFW, Sander, A, Scargle, JD, Schalk, TL, Sgrò, C, Siskind, EJ, Smith, PD, Spandre, G, Spinelli, P, Stamatikos, M, Strickman, MS, Suson, DJ, Tajima, H, Takahashi, H, Tanaka, T, Thayer, JB, Thayer, JG, Tibaldo, L, Torres, DF, Tosti, G, Tramacere, A, Uehara, T, Usher, TL, Vandenbroucke, J, Van Der Horst, AJ, Vasileiou, V, Vilchez, N, Vitale, V, Von Kienlin, A, Waite, AP, Wang, P, Wilson-Hodge, C, Winer, BL, Wood, KS, Wu, XF, Yamazaki, R, Yang, Z, Ylinen, T & Ziegler, M 2010, 'Fermi observations of high-energy gamma-ray emission from GRB 090217A', Astrophysical Journal Letters, vol. 717, no. 2 PART 2, pp. L127-L132. https://doi.org/10.1088/2041-8205/717/2/L127

TY - JOUR

T1 - Fermi observations of high-energy gamma-ray emission from GRB 090217A

AU - Ackermann, M.

AU - Ajello, M.

AU - Baldini, L.

AU - Ballet, J.

AU - Barbiellini, G.

AU - Baring, M. G.

AU - Bastieri, D.

AU - Bechtol, K.

AU - Bellazzini, R.

AU - Berenji, B.

AU - Bhat, P. N.

AU - Bissaldi, E.

AU - Blandford, R. D.

AU - Bonamente, E.

AU - Borgland, A. W.

AU - Bouvier, A.

AU - Bregeon, J.

AU - Brez, A.

AU - Briggs, M. S.

AU - Brigida, M.

AU - Bruel, P.

AU - Buehler, R.

AU - Buson, S.

AU - Caliandro, G. A.

AU - Cameron, R. A.

AU - Caraveo, P. A.

AU - Carrigan, S.

AU - Casandjian, J. M.

AU - Cecchi, C.

AU - Çelik, Ö

AU - Charles, E.

AU - Chekhtman, A.

AU - Chiang, J.

AU - Ciprini, S.

AU - Claus, R.

AU - Cohen-Tanugi, J.

AU - Connaughton, V.

AU - Conrad, J.

AU - Cutini, S.

AU - Dermer, C. D.

AU - De Angelis, A.

AU - De Palma, F.

AU - Digel, S. W.

AU - Do Couto E Silva, E.

AU - Drell, P. S.

AU - Dubois, R.

AU - Favuzzi, C.

AU - Fegan, S. J.

AU - Ferrara, E. C.

AU - Frailis, M.

AU - Fukazawa, Y.

AU - Fusco, P.

AU - Gargano, F.

AU - Gasparrini, D.

AU - Gehrels, N.

AU - Germani, S.

AU - Giglietto, N.

AU - Giommi, P.

AU - Giordano, F.

AU - Giroletti, M.

AU - Glanzman, T.

AU - Godfrey, G.

AU - Granot, J.

AU - Grenier, I. A.

AU - Grove, J. E.

AU - Guillemot, L.

AU - Guiriec, S.

AU - Hadasch, D.

AU - Hays, E.

AU - Horan, D.

AU - Hughes, R. E.

AU - Jóhannesson, G.

AU - Johnson, A. S.

AU - Johnson, W. N.

AU - Kamae, T.

AU - Katagiri, H.

AU - Kippen, R. M.

AU - Knödlseder, J.

AU - Kocevski, D.

AU - Kuss, M.

AU - Lande, J.

AU - Latronico, L.

AU - Lee, S. H.

AU - Garde, M. Llena

AU - Longo, F.

AU - Loparco, F.

AU - Lovellette, M. N.

AU - Lubrano, P.

AU - Makeev, A.

AU - Mazziotta, M. N.

AU - McBreen, S.

AU - McEnery, J. E.

AU - McGlynn, S.

AU - Meegan, C.

AU - Mehault, J.

AU - Mészros, P.

AU - Michelson, P. F.

AU - Mizuno, T.

AU - Moiseev, A. A.

AU - Monte, C.

AU - Monzani, M. E.

AU - Moretti, E.

AU - Morselli, A.

AU - Moskalenko, I. V.

AU - Murgia, S.

AU - Nakajima, H.

AU - Nakamori, T.

AU - Naumann-Godo, M.

AU - Nolan, P. L.

AU - Norris, J. P.

AU - Nuss, E.

AU - Ohno, M.

AU - Ohsugi, T.

AU - Okumura, A.

AU - Omodei, N.

AU - Orlando, E.

AU - Ormes, J. F.

AU - Ozaki, M.

AU - Paciesas, W. S.

AU - Paneque, D.

AU - Panetta, J. H.

AU - Parent, D.

AU - Pelassa, V.

AU - Pepe, M.

AU - Pesce-Rollins, M.

AU - Petrosian, V.

AU - Piron, F.

AU - Porter, T. A.

AU - Preece, R.

AU - Racusin, J. L.

AU - Rainò, S.

AU - Rando, R.

AU - Rau, A.

AU - Razzano, M.

AU - Razzaque, S.

AU - Reimer, A.

AU - Reimer, O.

AU - Ripken, J.

AU - Roth, M.

AU - Ryde, F.

AU - Sadrozinski, H. F.W.

AU - Sander, A.

AU - Scargle, J. D.

AU - Schalk, T. L.

AU - Sgrò, C.

AU - Siskind, E. J.

AU - Smith, P. D.

AU - Spandre, G.

AU - Spinelli, P.

AU - Stamatikos, M.

AU - Strickman, M. S.

AU - Suson, D. J.

AU - Tajima, H.

AU - Takahashi, H.

AU - Tanaka, T.

AU - Thayer, J. B.

AU - Thayer, J. G.

AU - Tibaldo, L.

AU - Torres, D. F.

AU - Tosti, G.

AU - Tramacere, A.

AU - Uehara, T.

AU - Usher, T. L.

AU - Vandenbroucke, J.

AU - Van Der Horst, A. J.

AU - Vasileiou, V.

AU - Vilchez, N.

AU - Vitale, V.

AU - Von Kienlin, A.

AU - Waite, A. P.

AU - Wang, P.

AU - Wilson-Hodge, C.

AU - Winer, B. L.

AU - Wood, K. S.

AU - Wu, X. F.

AU - Yamazaki, R.

AU - Yang, Z.

AU - Ylinen, T.

AU - Ziegler, M.

PY - 2010

Y1 - 2010

N2 - The Fermi observatory is advancing our knowledge of gamma-ray bursts (GRBs) through pioneering observations at high energies, covering more than seven decades in energy with the two on-board detectors, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). Here, we report on the observation of the long GRB 090217A which triggered the GBM and has been detected by the LAT with a significance greater than 9σ. We present the GBM and LAT observations and on-ground analyses, including the time-resolved spectra and the study of the temporal profile from 8 keV up to 1 GeV. All spectra are well reproduced by a Band model. We compare these observations to the first two LAT-detected, long bursts GRB 080825C and GRB 080916C. These bursts were found to have time-dependent spectra and exhibited a delayed onset of the high-energy emission, which are not observed in the case of GRB 090217A. We discuss some theoretical implications for the high-energy emission of GRBs.

AB - The Fermi observatory is advancing our knowledge of gamma-ray bursts (GRBs) through pioneering observations at high energies, covering more than seven decades in energy with the two on-board detectors, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). Here, we report on the observation of the long GRB 090217A which triggered the GBM and has been detected by the LAT with a significance greater than 9σ. We present the GBM and LAT observations and on-ground analyses, including the time-resolved spectra and the study of the temporal profile from 8 keV up to 1 GeV. All spectra are well reproduced by a Band model. We compare these observations to the first two LAT-detected, long bursts GRB 080825C and GRB 080916C. These bursts were found to have time-dependent spectra and exhibited a delayed onset of the high-energy emission, which are not observed in the case of GRB 090217A. We discuss some theoretical implications for the high-energy emission of GRBs.

KW - gamma-ray burst: individual (GRB090217A)

UR - https://www.scopus.com/pages/publications/77954013067

U2 - 10.1088/2041-8205/717/2/L127

DO - 10.1088/2041-8205/717/2/L127

M3 - Article

AN - SCOPUS:77954013067

SN - 2041-8205

VL - 717

SP - L127-L132

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2 PART 2

ER -

Fermi observations of high-energy gamma-ray emission from GRB 090217A

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