A tale of two faint bursts: GRB 050223 and GRB 050911

K. L. Page, S. D. Barthelmy, A. P. Beardmore, D. N. Burrows, S. Campana, G. Chincharini, J. R. Cummings, G. Cusumano, N. Gehrels, P. Giommi, M. R. Goad, O. Godet, J. Graham, Y. Kaneko, J. A. Kennea, V. Mangano, C. B. Markwardt, P. T. O'Brien, J. P. Osborne, D. E. ReichartE. Rol, T. Sakamoto, G. Tagliaferri, N. R. Tanvir, A. A. Wells, B. Zhang

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


GRBs 050223 and 050911 were discovered by the Swift Burst Alert Telescope (BAT) on 23rd February and 11th September 2005 respectively. The observation of GRB 050223 showed a faint, fading X-ray source, which was identified as the afterglow; GRB 050911, however, was not detected, making any X-ray afterglow extremely faint. The faintness of the afterglow of GRB 050223 could be explained by a large opening or viewing angle, or by the burst being at high redshift. The non-detection of GRB 050911 may indicate the burst occurred in a low-density environment, or, alternatively, was due to a compact object merger, in spite of the apparent long duration of the burst.

Original languageEnglish (US)
Title of host publicationGAMMA-RAY BURSTS IN THE SWIFT ERA
Subtitle of host publicationSixteenth Maryland Astrophysics Conference
Number of pages4
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
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


OtherGAMMA-RAY BURSTS IN THE SWIFT ERA: 16th Maryland Astrophysics Conference
Country/TerritoryUnited States
CityWashington, D.C.

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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