GRB 050904: The oldest cosmic explosion ever observed in the Universe

G. Cusumano, V. Mangano, G. Chincarini, A. Panaitescu, D. N. Burrows, V. La Parola, T. Sakamoto, S. Campana, T. Mineo, G. Tagliaferri, L. Angelini, S. D. Barthelemy, A. P. Beardmore, P. T. Boyd, L. R. Cominsky, C. Gronwall, E. E. Fenimore, N. Gehrels, P. Giommi, M. GoadK. Hurley, J. A. Kennea, K. O. Mason, F. Marshall, P. Mèszàros, J. A. Nousek, J. P. Osborne, D. M. Palmer, P. W.A. Roming, A. Wells, N. E. White, B. Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Swift discovered the high redshift (z=6.29) GRB 050904 with the Burst Alert Telescope and began observing with its narrow field instruments only 161 s after the burst onset. GRB 050904 was a long, multi-peaked, bright GRB with a presence of flaring activity lasting up to 1-2 hours after the burst onset. The spectral energy distribution shows a clear softening trend along the burst evolution with a photon index decreasing from -1.2 up to -1.9. The observed variability is more dramatic than the typical Swift afterglow, the amplitude and rise/fall times of the flares are consistent with the behavior of nearby (z ≤ 1) long GRBs and suggest the interpretation of the BAT and XRT data as a single continuous observation of long lasting prompt emission.

Original languageEnglish (US)
Title of host publicationGAMMA-RAY BURSTS IN THE SWIFT ERA
Subtitle of host publicationSixteenth Maryland Astrophysics Conference
Pages564-569
Number of pages6
DOIs
StatePublished - May 19 2006
EventGAMMA-RAY BURSTS IN THE SWIFT ERA: 16th Maryland Astrophysics Conference - Washington, D.C., United States
Duration: Nov 29 2005Dec 2 2005

Publication series

NameAIP Conference Proceedings
Volume836
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherGAMMA-RAY BURSTS IN THE SWIFT ERA: 16th Maryland Astrophysics Conference
CountryUnited States
CityWashington, D.C.
Period11/29/0512/2/05

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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  • Cite this

    Cusumano, G., Mangano, V., Chincarini, G., Panaitescu, A., Burrows, D. N., La Parola, V., Sakamoto, T., Campana, S., Mineo, T., Tagliaferri, G., Angelini, L., Barthelemy, S. D., Beardmore, A. P., Boyd, P. T., Cominsky, L. R., Gronwall, C., Fenimore, E. E., Gehrels, N., Giommi, P., ... Zhang, B. (2006). GRB 050904: The oldest cosmic explosion ever observed in the Universe. In GAMMA-RAY BURSTS IN THE SWIFT ERA: Sixteenth Maryland Astrophysics Conference (pp. 564-569). (AIP Conference Proceedings; Vol. 836). https://doi.org/10.1063/1.2207955