BROADBAND STUDY OF GRB 091127: A SUB-ENERGETIC BURST AT HIGHER REDSHIFT?

Journal Article · Mon Dec 10 00:00:00 EST 2012 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/761/1/50· OSTI ID:22140037

Troja, E.; Sakamoto, T.; Brown, J. C.; Gehrels, N.; Marshall, F. E.; Racusin, J. L. ^[1]; Guidorzi, C. ^[2]; Norris, J. P. ^[3]; Panaitescu, A. ^[4]; Kobayashi, S.; Mawson, N.; Melandri, A.; Mundell, C. G.; Steele, I. A. ^[5]; Omodei, N. ^[6]; Burrows, D. N. ^[7]; Evans, P. A. ^[8]; Oates, S. R. ^[9]; Pal'shin, V. ^[10]; Preece, R. D. ^[11] ; others, and

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1. NASA, Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
2. Physics Department, University of Ferrara, via Saragat 1, I-44122, Ferrara (Italy)
3. Physics Department, Boise State University, 1910 University Drive, Boise, ID 83725 (United States)
4. Space Science and Applications, MS D466, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)
5. Astrophysics Research Institute, Liverpool John Moores University, Twelve Quays House, Egerton Wharf, CH41 1LD Birkenhead (United Kingdom)
6. W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
7. Department of Astronomy and Astrophysics, Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States)
8. X-ray and Observational Astronomy Group, Department of Physics and Astronomy, University of Leicester, Leicester LE1 7RH (United Kingdom)
9. Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey RH5 6NT (United Kingdom)
10. Ioffe Physico-Technical Institute, Laboratory for Experimental Astrophysics, 26 Polytekhnicheskaya, St Petersburg 194021 (Russian Federation)
11. Department of Physics, University of Alabama in Huntsville, NSSTC, 320 Sparkman Drive, Huntsville, AL 35805 (United States)

GRB 091127 is a bright gamma-ray burst (GRB) detected by Swift at a redshift z = 0.49 and associated with SN 2009nz. We present the broadband analysis of the GRB prompt and afterglow emission and study its high-energy properties in the context of the GRB/SN association. While the high luminosity of the prompt emission and standard afterglow behavior are typical of cosmological long GRBs, its low-energy release (E{sub {gamma}} < 3 Multiplication-Sign 10{sup 49} erg), soft spectrum, and unusual spectral lag connect this GRB to the class of sub-energetic bursts. We discuss the suppression of high-energy emission in this burst, and investigate whether this behavior could be connected with the sub-energetic nature of the explosion.

• OSTI ID: 22140037
• Journal Information: Astrophysical Journal, Vol. 761, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
AFTERGLOW
ASTROPHYSICS
COSMIC GAMMA BURSTS
EMISSION SPECTRA
GAMMA ASTRONOMY
GAMMA SPECTRA
LUMINOSITY
RED SHIFT
SUPERNOVAE