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'AmmandoF. 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

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

160 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
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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{854cf2e463f74fcabb1731d1342d1808,

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) × 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

UR - http://www.scopus.com/inward/record.url?scp=84866432468&partnerID=8YFLogxK

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

ASJC Scopus subject areas

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