A Comprehensive Study of GRB 070125, A Most Energetic Gamma-Ray Burst
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Cenko, Stephen B; Frail, Dale A; Chevalier, Roger A; Macquart, J.P.; Kulkarni, Shrinivas R; Bock, Douglas C.-J.; Bertoldi, Frank; Kasliwal, M M; Fox, Derek B; Price, Paul Antony; Schmidt, Brian; Dopita, Michael; Peterson, Bruce
Description
We present a comprehensive multiwavelength analysis of the bright, long-duration gamma-ray burst GRB 070125, comprised of observations in gamma-ray, X-ray, optical, millimeter, and centimeter wave bands. Simultaneous fits to the optical and X-ray light curves favor a break on day 3.78, which we interpret as the jet break from a collimated outflow. Independent fits to optical and X-ray bands give similar results in the optical bands but shift the jet break to around day 10 in the X-ray light...[Show more]
dc.contributor.author | Cenko, Stephen B | |
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dc.contributor.author | Frail, Dale A | |
dc.contributor.author | Chevalier, Roger A | |
dc.contributor.author | Macquart, J.P. | |
dc.contributor.author | Kulkarni, Shrinivas R | |
dc.contributor.author | Bock, Douglas C.-J. | |
dc.contributor.author | Bertoldi, Frank | |
dc.contributor.author | Kasliwal, M M | |
dc.contributor.author | Fox, Derek B | |
dc.contributor.author | Price, Paul Antony | |
dc.contributor.author | Schmidt, Brian | |
dc.contributor.author | Dopita, Michael | |
dc.contributor.author | Peterson, Bruce | |
dc.date.accessioned | 2015-12-08T22:36:13Z | |
dc.identifier.issn | 0004-637X | |
dc.identifier.uri | http://hdl.handle.net/1885/35159 | |
dc.description.abstract | We present a comprehensive multiwavelength analysis of the bright, long-duration gamma-ray burst GRB 070125, comprised of observations in gamma-ray, X-ray, optical, millimeter, and centimeter wave bands. Simultaneous fits to the optical and X-ray light curves favor a break on day 3.78, which we interpret as the jet break from a collimated outflow. Independent fits to optical and X-ray bands give similar results in the optical bands but shift the jet break to around day 10 in the X-ray light curve. We show that for the physical parameters derived for GRB 070125, inverse Compton scattering effects are important throughout the afterglow evolution. While inverse Compton scattering does not affect radio and optical bands, it may be a promising candidate to delay the jet break in the X-ray band. Radio light curves show rapid flux variations, which are interpreted as due to interstellar scintillation and used to derive an upper limit of 2.4 × 10 17 cm on the radius of the fireball in the lateral expansion phase of the jet. Radio light curves and spectra suggest a high synchrotron self-absorption frequency indicative of the afterglow shock wave moving in a dense medium. Our broadband modeling favors a constant density profile for the circumburst medium over a windlike profile (R -2). However, keeping in mind the uncertainty of the parameters, it is difficult to unambiguously distinguish between the two density profiles. Our broadband fits suggest that GRB 070125 is a burst with high radiative efficiency (>60%). | |
dc.description.sponsorship | R. A. C. was supported in part by NASA grant NNG06GJ33G. | |
dc.format | 19 pages | |
dc.publisher | IOP Publishing | |
dc.source | Astrophysical Journal, The | |
dc.subject | Keywords: Gamma rays: bursts; Gamma rays: observations; Radiation mechanisms: general; Techniques: radar astronomy; X-rays: bursts | |
dc.title | A Comprehensive Study of GRB 070125, A Most Energetic Gamma-Ray Burst | |
dc.type | Journal article | |
local.description.notes | Imported from ARIES | |
local.identifier.citationvolume | 683 | |
dc.date.issued | 2008 | |
local.identifier.absfor | 020103 - Cosmology and Extragalactic Astronomy | |
local.identifier.ariespublication | u4362859xPUB121 | |
local.type.status | Published Version | |
local.contributor.affiliation | Chandra, Poonam, University of Virginia | |
local.contributor.affiliation | Cenko, Stephen B, California Institute of Technology | |
local.contributor.affiliation | Frail, Dale A, National Radio Astronomy Observatory | |
local.contributor.affiliation | Chevalier, Roger A, University of Virginia | |
local.contributor.affiliation | Macquart, J.P., California Institute of Technology | |
local.contributor.affiliation | Kulkarni, Shrinivas R, California Institute of Technology | |
local.contributor.affiliation | Bock, Douglas C.-J., Combined Array for Research in Millimeter-Wave Astronomy | |
local.contributor.affiliation | Bertoldi, Frank, Argelander Institute for Astronomy | |
local.contributor.affiliation | Kasliwal, M M, California Institute of Technology | |
local.contributor.affiliation | Fox, Derek B, Pennsylvania State University | |
local.contributor.affiliation | Price, Paul Antony, University of Hawaii | |
local.contributor.affiliation | Schmidt, Brian, College of Physical and Mathematical Sciences, The Australian National University | |
local.contributor.affiliation | Dopita, Michael, College of Physical and Mathematical Sciences, The Australian National University | |
local.contributor.affiliation | Peterson, Bruce, College of Physical and Mathematical Sciences, The Australian National University | |
local.identifier.essn | 1538-4357 | |
local.bibliographicCitation.issue | Aug | |
local.bibliographicCitation.startpage | 924 | |
local.bibliographicCitation.lastpage | 942 | |
local.identifier.doi | 10.1086/589807 | |
dc.date.updated | 2015-12-08T09:48:18Z | |
local.identifier.scopusID | 2-s2.0-51349136803 | |
local.identifier.thomsonID | 000258528100025 | |
dcterms.accessRights | Open Access | |
dc.provenance | http://www.sherpa.ac.uk/romeo/issn/0004-637X/ Author can archive publisher's version/PDF. Publisher's version/PDF may be used on any website or authors' institutional repository (Sherpa/Romeo as of 18/9/2018) | |
Collections | ANU Research Publications |
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