GRB 050717: A Long, Short-Lag Burst Observed by Swift and Konus

Journal Article · Fri May 19 00:00:00 EDT 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2207875· OSTI ID:20798677

Krimm, H A ^[1]; Hurkett, C; Osborne, J P ^[2]; Pal'shin, V; Golenetskii, S ^[3]; Norris, J P; Barthelmy, S D; Gehrels, N; Parsons, A M ^[1]; Zhang, B ^[4]; Burrows, D N ^[5]; Perri, M ^[6]

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1. NASA Goddard Space Flight Center, Greenbelt, Maryland, 20771 (United States)
2. Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH (United Kingdom)
3. Ioffe Physico-Technical Institute, Laboratory for Experimental Astrophysics, 26 Polytekhnicheskaya, St Petersburg 194021 (Russian Federation)
4. Physics Department, University of Nevada, Las Vegas, NV 89154 (United States)
5. Department of Astronomy and Astrophysics, 525 Davey Lab., Pennsylvania State University, University Park, PA 16802 (United States)
6. ASI Science Data Center, Via Galileo Galilei, I-00044 Frascati (Italy)

The long burst GRB 050717 was observed simultaneously by the Burst Alert Telescope (BAT) on Swift and the Konus instrument on Wind. Significant hard to soft spectral evolution was seen. Early gamma-ray and X-ray emission was detected by both BAT and the X-Ray Telescope (XRT) on Swift. The XRT continued to observe the burst for 7.1 days and detect it for 1.4 days. The X-ray light curve showed a classic decay pattern including evidence of the onset of the external shock emission at {approx} 45 s after the trigger; the afterglow was too faint for a jet break to be detected. No optical, infrared or ultraviolet counterpart was discovered despite deep searches within 14 hours of the burst. The spectral lag for GRB 050717 was determined to be 2.5 {+-} 2.6 ms, consistent with zero and unusually short for a long burst. This lag measurement suggests that this burst has a high intrinsic luminosity and hence is at high redshift (z > 2.7). GRB 050717 provides a good example of classic prompt and afterglow behavior for a gamma-ray burst.

• OSTI ID: 20798677
• Journal Information: AIP Conference Proceedings, Vol. 836, Issue 1; Conference: 16. Maryland astrophysics conference, Washington, DC (United States), 29 Nov - 2 Dec 2005; Other Information: DOI: 10.1063/1.2207875; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AFTERGLOW
COSMIC GAMMA BURSTS
COSMIC PHOTONS
DECAY
GAMMA DETECTION
GAMMA RADIATION
LUMINOSITY
PHOTON EMISSION
X RADIATION