The ultraluminous GRB 110918a

D. D. Frederiks, K. Hurley, D. S. Svinkin, V. D. Pal'Shin, V. Mangano, S. Oates, R. L. Aptekar, S. V. Golenetskii, E. P. Mazets, Ph P. Oleynik, A. E. Tsvetkova, M. V. Ulanov, A. A. Kokomov, T. L. Cline, D. N. Burrows, H. A. Krimm, C. Pagani, B. Sbarufatti, M. H. Siegel, I. G. MitrofanovD. Golovin, M. L. Litvak, A. B. Sanin, William V. Boynton, C. Fellows, K. Harshman, H. Enos, R. Starr, A. Von Kienlin, A. Rau, X. Zhang, J. Goldstein

Research output: Contribution to journalArticle

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Abstract

GRB 110918A is the brightest long gamma-ray burst (GRB) detected by Konus-WIND during its almost 19 yr of continuous observations and the most luminous GRB ever observed since the beginning of the cosmological era in 1997. We report on the final Interplanetary Network localization of this event and its detailed multiwavelength study with a number of space-based instruments. The prompt emission is characterized by a typical duration, a moderate peak energy of the time-integrated spectrum, and strong hard-to-soft evolution. The high observed energy fluence yields, at z = 0.984, a huge isotropic-equivalent energy release E iso = (2.1 ± 0.1) × 1054 erg. The record-breaking energy flux observed at the peak of the short, bright, hard initial pulse results in an unprecedented isotropic-equivalent luminosity L iso = (4.7 ± 0.2) × 1054 erg s-1. A tail of the soft γ-ray emission was detected with temporal and spectral behavior typical of that predicted by the synchrotron forward-shock model. The Swift/X-Ray Telescope and the Swift/Ultraviolet Optical Telescope observed the bright afterglow from 1.2 to 48 days after the burst and revealed no evidence of a jet break. The post-break scenario for the afterglow is preferred from our analysis, with a hard underlying electron spectrum and interstellar-medium-like circumburst environment implied. We conclude that, among the multiple reasons investigated, the tight collimation of the jet must have been a key ingredient to produce this unusually bright burst. The inferred jet opening angle of 1.°7-3.°4 results in reasonable values of the collimation-corrected radiated energy and the peak luminosity, which, however, are still at the top of their distributions for such tightly collimated events. We estimate a detection horizon for a similar ultraluminous GRB of z 7.5 for Konus-WIND and z 12 for the Swift/Burst Alert Telescope, which stresses the importance of GRBs as probes of the early Universe.

Original languageEnglish (US)
Article number151
JournalAstrophysical Journal
Volume779
Issue number2
DOIs
StatePublished - Dec 20 2013

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gamma ray bursts
bursts
erg
energy
collimation
telescopes
afterglows
luminosity
energy flux
ingredients
probe
horizon
rays
fluence
synchrotrons
electron
universe
shock
probes
estimates

Keywords

  • gamma-ray burst: individual (GRB 110918A)

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Frederiks, D. D., Hurley, K., Svinkin, D. S., Pal'Shin, V. D., Mangano, V., Oates, S., ... Goldstein, J. (2013). The ultraluminous GRB 110918a. Astrophysical Journal, 779(2), [151]. https://doi.org/10.1088/0004-637X/779/2/151

The ultraluminous GRB 110918a. / Frederiks, D. D.; Hurley, K.; Svinkin, D. S.; Pal'Shin, V. D.; Mangano, V.; Oates, S.; Aptekar, R. L.; Golenetskii, S. V.; Mazets, E. P.; Oleynik, Ph P.; Tsvetkova, A. E.; Ulanov, M. V.; Kokomov, A. A.; Cline, T. L.; Burrows, D. N.; Krimm, H. A.; Pagani, C.; Sbarufatti, B.; Siegel, M. H.; Mitrofanov, I. G.; Golovin, D.; Litvak, M. L.; Sanin, A. B.; Boynton, William V.; Fellows, C.; Harshman, K.; Enos, H.; Starr, R.; Von Kienlin, A.; Rau, A.; Zhang, X.; Goldstein, J.

In: Astrophysical Journal, Vol. 779, No. 2, 151, 20.12.2013.

Research output: Contribution to journalArticle

Frederiks, DD, Hurley, K, Svinkin, DS, Pal'Shin, VD, Mangano, V, Oates, S, Aptekar, RL, Golenetskii, SV, Mazets, EP, Oleynik, PP, Tsvetkova, AE, Ulanov, MV, Kokomov, AA, Cline, TL, Burrows, DN, Krimm, HA, Pagani, C, Sbarufatti, B, Siegel, MH, Mitrofanov, IG, Golovin, D, Litvak, ML, Sanin, AB, Boynton, WV, Fellows, C, Harshman, K, Enos, H, Starr, R, Von Kienlin, A, Rau, A, Zhang, X & Goldstein, J 2013, 'The ultraluminous GRB 110918a', Astrophysical Journal, vol. 779, no. 2, 151. https://doi.org/10.1088/0004-637X/779/2/151
Frederiks DD, Hurley K, Svinkin DS, Pal'Shin VD, Mangano V, Oates S et al. The ultraluminous GRB 110918a. Astrophysical Journal. 2013 Dec 20;779(2). 151. https://doi.org/10.1088/0004-637X/779/2/151
Frederiks, D. D. ; Hurley, K. ; Svinkin, D. S. ; Pal'Shin, V. D. ; Mangano, V. ; Oates, S. ; Aptekar, R. L. ; Golenetskii, S. V. ; Mazets, E. P. ; Oleynik, Ph P. ; Tsvetkova, A. E. ; Ulanov, M. V. ; Kokomov, A. A. ; Cline, T. L. ; Burrows, D. N. ; Krimm, H. A. ; Pagani, C. ; Sbarufatti, B. ; Siegel, M. H. ; Mitrofanov, I. G. ; Golovin, D. ; Litvak, M. L. ; Sanin, A. B. ; Boynton, William V. ; Fellows, C. ; Harshman, K. ; Enos, H. ; Starr, R. ; Von Kienlin, A. ; Rau, A. ; Zhang, X. ; Goldstein, J. / The ultraluminous GRB 110918a. In: Astrophysical Journal. 2013 ; Vol. 779, No. 2.
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AU - Frederiks, D. D.

AU - Hurley, K.

AU - Svinkin, D. S.

AU - Pal'Shin, V. D.

AU - Mangano, V.

AU - Oates, S.

AU - Aptekar, R. L.

AU - Golenetskii, S. V.

AU - Mazets, E. P.

AU - Oleynik, Ph P.

AU - Tsvetkova, A. E.

AU - Ulanov, M. V.

AU - Kokomov, A. A.

AU - Cline, T. L.

AU - Burrows, D. N.

AU - Krimm, H. A.

AU - Pagani, C.

AU - Sbarufatti, B.

AU - Siegel, M. H.

AU - Mitrofanov, I. G.

AU - Golovin, D.

AU - Litvak, M. L.

AU - Sanin, A. B.

AU - Boynton, William V.

AU - Fellows, C.

AU - Harshman, K.

AU - Enos, H.

AU - Starr, R.

AU - Von Kienlin, A.

AU - Rau, A.

AU - Zhang, X.

AU - Goldstein, J.

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