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. BrigidaP. 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

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

30 Scopus citations

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 (US)
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
State	Published - 2010

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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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{270d87ac56204f6790f7c62707c53ebf,

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.",

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 (US)",

volume = "717",

pages = "L127--L132",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "IOP Publishing Ltd.",

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.

UR - http://www.scopus.com/inward/record.url?scp=77954013067&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77954013067&partnerID=8YFLogxK

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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