GRB110721A: An extreme peak energy and signatures of the photosphere

M. Axelsson; L. Baldini; G. Barbiellini; M. G. Baring; R. Bellazzini; J. Bregeon; M. Brigida; P. Bruel; R. Buehler; G. A. Caliandro; R. A. Cameron; P. A. Caraveo; C. Cecchi; R. C.G. Chaves; A. Chekhtman; J. Chiang; R. Claus; J. Conrad; S. Cutini; F. D'Ammando; F. De Palma; C. D. Dermer; E. Do Couto E Silva; P. S. Drell; C. Favuzzi; S. J. Fegan; E. C. Ferrara; W. B. Focke; Y. Fukazawa; P. Fusco; F. Gargano; D. Gasparrini; N. Gehrels; S. Germani; N. Giglietto; M. Giroletti; G. Godfrey; S. Guiriec; D. Hadasch; Y. Hanabata; M. Hayashida; X. Hou; S. Iyyani; M. S. Jackson; D. Kocevski; M. Kuss; J. Larsson; S. Larsson; F. Longo; F. Loparco; C. Lundman; M. N. Mazziotta; J. E. McEnery; T. Mizuno; M. E. Monzani; E. Moretti; A. Morselli; S. Murgia; E. Nuss; T. Nymark; M. Ohno; N. Omodei; M. Pesce-Rollins; F. Piron; G. Pivato; J. L. Racusin; S. Rainò; M. Razzano; S. Razzaque; A. Reimer; M. Roth; F. Ryde; D. A. Sanchez; C. Sgrò; E. J. Siskind; G. Spandre; P. Spinelli; M. Stamatikos; L. Tibaldo; M. Tinivella; T. L. Usher; J. Vandenbroucke; V. Vasileiou; G. Vianello; V. Vitale; A. P. Waite; B. L. Winer; K. S. Wood; J. M. Burgess; P. N. Bhat; E. Bissaldi; M. S. Briggs; V. Connaughton; G. Fishman; G. Fitzpatrick; S. Foley; D. Gruber; R. M. Kippen; C. Kouveliotou; P. Jenke; S. McBreen; S. McGlynn; C. Meegan; W. S. Paciesas; V. Pelassa; R. Preece; D. Tierney; A. Von Kienlin; C. Wilson-Hodge; S. Xiong; A. Pe'Er

doi:10.1088/2041-8205/757/2/L31

GRB110721A: An extreme peak energy and signatures of the photosphere

M. Axelsson
, L. Baldini
, G. Barbiellini
, M. G. Baring
, R. Bellazzini
, J. Bregeon
, M. Brigida
, P. Bruel
, R. Buehler
, G. A. Caliandro
, R. A. Cameron
, P. A. Caraveo
, C. Cecchi
, R. C.G. Chaves
, A. Chekhtman
, J. Chiang
, R. Claus
, J. Conrad
, S. Cutini
, F. D'Ammando

F. De Palma, C. D. Dermer, E. Do Couto E Silva, P. S. Drell, C. Favuzzi, S. J. Fegan, E. C. Ferrara, W. B. Focke, Y. Fukazawa, P. Fusco, F. Gargano, D. Gasparrini, N. Gehrels, S. Germani, N. Giglietto, M. Giroletti, G. Godfrey, S. Guiriec, D. Hadasch, Y. Hanabata, M. Hayashida, X. Hou, S. Iyyani, M. S. Jackson, D. Kocevski, M. Kuss, J. Larsson, S. Larsson, F. Longo, F. Loparco, C. Lundman, M. N. Mazziotta, J. E. McEnery, T. Mizuno, M. E. Monzani, E. Moretti, A. Morselli, S. Murgia, E. Nuss, T. Nymark, M. Ohno, N. Omodei, M. Pesce-Rollins, F. Piron, G. Pivato, J. L. Racusin, S. Rainò, M. Razzano, S. Razzaque, A. Reimer, M. Roth, F. Ryde, D. A. Sanchez, C. Sgrò, E. J. Siskind, G. Spandre, P. Spinelli, M. Stamatikos, L. Tibaldo, M. Tinivella, T. L. Usher, J. Vandenbroucke, V. Vasileiou, G. Vianello, V. Vitale, A. P. Waite, B. L. Winer, K. S. Wood, J. M. Burgess, P. N. Bhat, E. Bissaldi, M. S. Briggs, V. Connaughton, G. Fishman, G. Fitzpatrick, S. Foley, D. Gruber, R. M. Kippen, C. Kouveliotou, P. Jenke, S. McBreen, S. McGlynn, C. Meegan, W. S. Paciesas, V. Pelassa, R. Preece, D. Tierney, A. Von Kienlin, C. Wilson-Hodge, S. Xiong, A. Pe'Er

KTH Royal Institute of Technology
Stockholm University
Oskar Klein Centre
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
INFN Sezione di Trieste
University of Trieste
Rice University
Politecnico di Bari
INFN Sezione di Bari
Stanford University
University of Sheffield
INAF Istituto di Astrofisica Spaziale e Fisica Cosmica, Milan
INFN Sezione di Perugia
University of Perugia
Universite Paris-Saclay
George Mason University
Science and Research Directorate
INAF Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo
INAF-IASF
Naval Research Laboratory
NASA Goddard Space Flight Center
Hiroshima University
INAF Istituto di Radioastronomia
Kyoto University
UMR 5797
University of Maryland
Sezione di Roma
Laboratoire Univers et Particules de Montpellier
ISAS/JAXA
University of Padova
University of California at Santa Cruz
Medical University of Innsbruck
University of Washington
Max-Planck-Institut für Kernphysik
NYCB Real-Time Computing Inc.
The Ohio State University
INFN
Consorzio Interuniversitario per la Fisica Spaziale (CIFS)
University of Rome “Tor Vergata”
Center for Space Plasma and Aeronomic Research
NASA Marshall Space Flight Center
University College Dublin
Max Planck Institut für Extraterrestrische Physik
MST-8, Los Alamos National Laboratory
Technical University of Munich
Universities Space Research Association
Center for Astrophysics | Harvard & Smithsonian

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

172 Citations (Scopus)

Abstract

GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The burst consisted of one major emission episode which lasted for 24.5s (in the GBM) and had a peak flux of (5.7 ± 0.2) × 10 ^-5ergs^-1cm^-2. The time-resolved emission spectrum is best modeled with a combination of a Band function and a blackbody spectrum. The peak energy of the Band component was initially 15 ± 2MeV, which is the highest value ever detected in a GRB. This measurement was made possible by combining GBM/BGO data with LAT Low Energy events to achieve continuous 10-100MeV coverage. The peak energy later decreased as a power law in time with an index of -1.89 ± 0.10. The temperature of the blackbody component also decreased, starting from 80keV, and the decay showed a significant break after 2s. The spectrum provides strong constraints on the standard synchrotron model, indicating that alternative mechanisms may give rise to the emission at these energies.

Original language	English
Article number	L31
Journal	Astrophysical Journal Letters
Volume	757
Issue number	2
DOIs	https://doi.org/10.1088/2041-8205/757/2/L31
Publication status	Published - 1 Oct 2012

Keywords

gamma-ray burst: general
gamma-ray burst: individual (GRB110721A)
radiation mechanisms: thermal

Access to Document

10.1088/2041-8205/757/2/L31

Cite this

Axelsson, M., Baldini, L., Barbiellini, G., Baring, M. G., Bellazzini, R., Bregeon, J., Brigida, M., Bruel, P., Buehler, R., Caliandro, G. A., Cameron, R. A., Caraveo, P. A., Cecchi, C., Chaves, R. C. G., Chekhtman, A., Chiang, J., Claus, R., Conrad, J., Cutini, S., ... Pe'Er, A. (2012). GRB110721A: An extreme peak energy and signatures of the photosphere. Astrophysical Journal Letters, 757(2), Article L31. https://doi.org/10.1088/2041-8205/757/2/L31

@article{cc10edd8e08142d285fce7eaae1f817f,

title = "GRB110721A: An extreme peak energy and signatures of the photosphere",

abstract = "GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The burst consisted of one major emission episode which lasted for 24.5s (in the GBM) and had a peak flux of (5.7 ± 0.2) {\texttimes} 10 -5ergs-1cm-2. The time-resolved emission spectrum is best modeled with a combination of a Band function and a blackbody spectrum. The peak energy of the Band component was initially 15 ± 2MeV, which is the highest value ever detected in a GRB. This measurement was made possible by combining GBM/BGO data with LAT Low Energy events to achieve continuous 10-100MeV coverage. The peak energy later decreased as a power law in time with an index of -1.89 ± 0.10. The temperature of the blackbody component also decreased, starting from 80keV, and the decay showed a significant break after 2s. The spectrum provides strong constraints on the standard synchrotron model, indicating that alternative mechanisms may give rise to the emission at these energies.",

keywords = "gamma-ray burst: general, gamma-ray burst: individual (GRB110721A), radiation mechanisms: thermal",

author = "M. Axelsson and L. Baldini and G. Barbiellini and Baring, \{M. G.\} and R. Bellazzini and J. Bregeon and M. Brigida and P. Bruel and R. Buehler and Caliandro, \{G. A.\} and Cameron, \{R. A.\} and Caraveo, \{P. A.\} and C. Cecchi and Chaves, \{R. C.G.\} and A. Chekhtman and J. Chiang and R. Claus and J. Conrad and S. Cutini and F. D'Ammando and \{De Palma\}, F. and Dermer, \{C. D.\} and \{Do Couto E Silva\}, E. and Drell, \{P. S.\} and C. Favuzzi and Fegan, \{S. J.\} and Ferrara, \{E. C.\} and Focke, \{W. B.\} and Y. Fukazawa and P. Fusco and F. Gargano and D. Gasparrini and N. Gehrels and S. Germani and N. Giglietto and M. Giroletti and G. Godfrey and S. Guiriec and D. Hadasch and Y. Hanabata and M. Hayashida and X. Hou and S. Iyyani and Jackson, \{M. S.\} and D. Kocevski and M. Kuss and J. Larsson and S. Larsson and F. Longo and F. Loparco and C. Lundman and Mazziotta, \{M. N.\} and McEnery, \{J. E.\} and T. Mizuno and Monzani, \{M. E.\} and E. Moretti and A. Morselli and S. Murgia and E. Nuss and T. Nymark and M. Ohno and N. Omodei and M. Pesce-Rollins and F. Piron and G. Pivato and Racusin, \{J. L.\} and S. Rain{\`o} and M. Razzano and S. Razzaque and A. Reimer and M. Roth and F. Ryde and Sanchez, \{D. A.\} and C. Sgr{\`o} and Siskind, \{E. J.\} and G. Spandre and P. Spinelli and M. Stamatikos and L. Tibaldo and M. Tinivella and Usher, \{T. L.\} and J. Vandenbroucke and V. Vasileiou and G. Vianello and V. Vitale and Waite, \{A. P.\} and Winer, \{B. L.\} and Wood, \{K. S.\} and Burgess, \{J. M.\} and Bhat, \{P. N.\} and E. Bissaldi and Briggs, \{M. S.\} and V. Connaughton and G. Fishman and G. Fitzpatrick and S. Foley and D. Gruber and Kippen, \{R. M.\} and C. Kouveliotou and P. Jenke and S. McBreen and S. McGlynn and C. Meegan and Paciesas, \{W. S.\} and V. Pelassa and R. Preece and D. Tierney and \{Von Kienlin\}, A. and C. Wilson-Hodge and S. Xiong and A. Pe'Er",

year = "2012",

month = oct,

day = "1",

doi = "10.1088/2041-8205/757/2/L31",

language = "English",

volume = "757",

journal = "Astrophysical Journal Letters",

issn = "2041-8205",

publisher = "American Astronomical Society",

number = "2",

}

Axelsson, M, Baldini, L, Barbiellini, G, Baring, MG, Bellazzini, R, Bregeon, J, Brigida, M, Bruel, P, Buehler, R, Caliandro, GA, Cameron, RA, Caraveo, PA, Cecchi, C, Chaves, RCG, Chekhtman, A, Chiang, J, Claus, R, Conrad, J, Cutini, S, D'Ammando, F, De Palma, F, Dermer, CD, Do Couto E Silva, E, Drell, PS, Favuzzi, C, Fegan, SJ, Ferrara, EC, Focke, WB, Fukazawa, Y, Fusco, P, Gargano, F, Gasparrini, D, Gehrels, N, Germani, S, Giglietto, N, Giroletti, M, Godfrey, G, Guiriec, S, Hadasch, D, Hanabata, Y, Hayashida, M, Hou, X, Iyyani, S, Jackson, MS, Kocevski, D, Kuss, M, Larsson, J, Larsson, S, Longo, F, Loparco, F, Lundman, C, Mazziotta, MN, McEnery, JE, Mizuno, T, Monzani, ME, Moretti, E, Morselli, A, Murgia, S, Nuss, E, Nymark, T, Ohno, M, Omodei, N, Pesce-Rollins, M, Piron, F, Pivato, G, Racusin, JL, Rainò, S, Razzano, M, Razzaque, S, Reimer, A, Roth, M, Ryde, F, Sanchez, DA, Sgrò, C, Siskind, EJ, Spandre, G, Spinelli, P, Stamatikos, M, Tibaldo, L, Tinivella, M, Usher, TL, Vandenbroucke, J, Vasileiou, V, Vianello, G, Vitale, V, Waite, AP, Winer, BL, Wood, KS, Burgess, JM, Bhat, PN, Bissaldi, E, Briggs, MS, Connaughton, V, Fishman, G, Fitzpatrick, G, Foley, S, Gruber, D, Kippen, RM, Kouveliotou, C, Jenke, P, McBreen, S, McGlynn, S, Meegan, C, Paciesas, WS, Pelassa, V, Preece, R, Tierney, D, Von Kienlin, A, Wilson-Hodge, C, Xiong, S & Pe'Er, A 2012, 'GRB110721A: An extreme peak energy and signatures of the photosphere', Astrophysical Journal Letters, vol. 757, no. 2, L31. https://doi.org/10.1088/2041-8205/757/2/L31

TY - JOUR

T1 - GRB110721A

T2 - An extreme peak energy and signatures of the photosphere

AU - Axelsson, M.

AU - Baldini, L.

AU - Barbiellini, G.

AU - Baring, M. G.

AU - Bellazzini, R.

AU - Bregeon, J.

AU - Brigida, M.

AU - Bruel, P.

AU - Buehler, R.

AU - Caliandro, G. A.

AU - Cameron, R. A.

AU - Caraveo, P. A.

AU - Cecchi, C.

AU - Chaves, R. C.G.

AU - Chekhtman, A.

AU - Chiang, J.

AU - Claus, R.

AU - Conrad, J.

AU - Cutini, S.

AU - D'Ammando, F.

AU - De Palma, F.

AU - Dermer, C. D.

AU - Do Couto E Silva, E.

AU - Drell, P. S.

AU - Favuzzi, C.

AU - Fegan, S. J.

AU - Ferrara, E. C.

AU - Focke, W. B.

AU - Fukazawa, Y.

AU - Fusco, P.

AU - Gargano, F.

AU - Gasparrini, D.

AU - Gehrels, N.

AU - Germani, S.

AU - Giglietto, N.

AU - Giroletti, M.

AU - Godfrey, G.

AU - Guiriec, S.

AU - Hadasch, D.

AU - Hanabata, Y.

AU - Hayashida, M.

AU - Hou, X.

AU - Iyyani, S.

AU - Jackson, M. S.

AU - Kocevski, D.

AU - Kuss, M.

AU - Larsson, J.

AU - Larsson, S.

AU - Longo, F.

AU - Loparco, F.

AU - Lundman, C.

AU - Mazziotta, M. N.

AU - McEnery, J. E.

AU - Mizuno, T.

AU - Monzani, M. E.

AU - Moretti, E.

AU - Morselli, A.

AU - Murgia, S.

AU - Nuss, E.

AU - Nymark, T.

AU - Ohno, M.

AU - Omodei, N.

AU - Pesce-Rollins, M.

AU - Piron, F.

AU - Pivato, G.

AU - Racusin, J. L.

AU - Rainò, S.

AU - Razzano, M.

AU - Razzaque, S.

AU - Reimer, A.

AU - Roth, M.

AU - Ryde, F.

AU - Sanchez, D. A.

AU - Sgrò, C.

AU - Siskind, E. J.

AU - Spandre, G.

AU - Spinelli, P.

AU - Stamatikos, M.

AU - Tibaldo, L.

AU - Tinivella, M.

AU - Usher, T. L.

AU - Vandenbroucke, J.

AU - Vasileiou, V.

AU - Vianello, G.

AU - Vitale, V.

AU - Waite, A. P.

AU - Winer, B. L.

AU - Wood, K. S.

AU - Burgess, J. M.

AU - Bhat, P. N.

AU - Bissaldi, E.

AU - Briggs, M. S.

AU - Connaughton, V.

AU - Fishman, G.

AU - Fitzpatrick, G.

AU - Foley, S.

AU - Gruber, D.

AU - Kippen, R. M.

AU - Kouveliotou, C.

AU - Jenke, P.

AU - McBreen, S.

AU - McGlynn, S.

AU - Meegan, C.

AU - Paciesas, W. S.

AU - Pelassa, V.

AU - Preece, R.

AU - Tierney, D.

AU - Von Kienlin, A.

AU - Wilson-Hodge, C.

AU - Xiong, S.

AU - Pe'Er, A.

PY - 2012/10/1

Y1 - 2012/10/1

N2 - GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The burst consisted of one major emission episode which lasted for 24.5s (in the GBM) and had a peak flux of (5.7 ± 0.2) × 10 -5ergs-1cm-2. The time-resolved emission spectrum is best modeled with a combination of a Band function and a blackbody spectrum. The peak energy of the Band component was initially 15 ± 2MeV, which is the highest value ever detected in a GRB. This measurement was made possible by combining GBM/BGO data with LAT Low Energy events to achieve continuous 10-100MeV coverage. The peak energy later decreased as a power law in time with an index of -1.89 ± 0.10. The temperature of the blackbody component also decreased, starting from 80keV, and the decay showed a significant break after 2s. The spectrum provides strong constraints on the standard synchrotron model, indicating that alternative mechanisms may give rise to the emission at these energies.

AB - GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments, the Large Area Telescope (LAT) and the Gamma-ray Burst Monitor (GBM). The burst consisted of one major emission episode which lasted for 24.5s (in the GBM) and had a peak flux of (5.7 ± 0.2) × 10 -5ergs-1cm-2. The time-resolved emission spectrum is best modeled with a combination of a Band function and a blackbody spectrum. The peak energy of the Band component was initially 15 ± 2MeV, which is the highest value ever detected in a GRB. This measurement was made possible by combining GBM/BGO data with LAT Low Energy events to achieve continuous 10-100MeV coverage. The peak energy later decreased as a power law in time with an index of -1.89 ± 0.10. The temperature of the blackbody component also decreased, starting from 80keV, and the decay showed a significant break after 2s. The spectrum provides strong constraints on the standard synchrotron model, indicating that alternative mechanisms may give rise to the emission at these energies.

KW - gamma-ray burst: general

KW - gamma-ray burst: individual (GRB110721A)

KW - radiation mechanisms: thermal

U2 - 10.1088/2041-8205/757/2/L31

DO - 10.1088/2041-8205/757/2/L31

M3 - Article

AN - SCOPUS:84866432468

SN - 2041-8205

VL - 757

JO - Astrophysical Journal Letters

JF - Astrophysical Journal Letters

IS - 2

M1 - L31

ER -

GRB110721A: An extreme peak energy and signatures of the photosphere

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Keywords

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