Статья

The Rapidly Flaring Afterglow of the Very Bright and Energetic GRB 070125

A. C. UpdikeDepartment of Physics and Astronomy, Clemson University, Clemson, SC 29634J. B. HaislipDepartment of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599M. NysewanderSpace Telescope Science Institute, Baltimore, MD 21218A. S. FruchterSpace Telescope Science Institute, Baltimore, MD 21218Д. А. КаннThüringer Landessternwarte Tautenburg, D-07778 Tautenburg, GermanyS. KloseThüringer Landessternwarte Tautenburg, D-07778 Tautenburg, GermanyPeter MilneSteward Observatory, University of Arizona, Tucson, AZ 85721-0065G. G. WilliamsMMT Observatory, University of Arizona, Tucson, AZ 85721-0065WeiKang ZhengNational Astronomical Observatories, Chaoyang District, Beijing 100012, ChinaC. W. HergenrotherLunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721-0092J. X. ProchaskaUniversity of California Observatories/Lick Observatory, University of California, Santa Cruz, CA 95064J. P. HalpernColumbia Astrophysics Laboratory, Columbia University, New York, NY 10027N. MirabalColumbia Astrophysics Laboratory, Columbia University, New York, NY 10027J. R. ThorstensenDepartment of Physics and Astronomy, Dartmouth College, Hanover, NH 03755-3528A. J. van der HorstNASA Postdoctoral Program Fellow, NSSTC, Huntsville, AL 35805R. L. C. StarlingDepartment of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UKJ. L. RacusinDepartment of Astronomy and Astrophysics, Pennsylvannia State University, University Park, PA 16802David N. BurrowsDepartment of Astronomy and Astrophysics, Pennsylvannia State University, University Park, PA 16802N. P. M. KuinPeter W. A. RomingDepartment of Astronomy and Astrophysics, Pennsylvannia State University, University Park, PA 16802E. BellmUniversity of California, Space Sciences Laboratory, Berkeley, CA 94720-7450K. HurleyUniversity of California, Space Sciences Laboratory, Berkeley, CA 94720-7450Weidong LiDepartment of Astronomy, University of California, Berkeley, CA 94720-3411A. V. FilippenkoDepartment of Astronomy, University of California, Berkeley, CA 94720-3411Cullen H. BlakeHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138D. StarrDepartment of Astronomy, University of California, Berkeley, CA 94720-3411E. FalcoSmithsonian Institution, Whipple Observatory, Amado, AZ 85645Warren R. BrownHarvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138Xinyu DaiDepartment of Physics, Ohio State University, Columbus, OH 43210-1117Jinsong DengNational Astronomical Observatories, Chaoyang District, Beijing 100012, ChinaL. P. XinNational Astronomical Observatories, Chaoyang District, Beijing 100012, ChinaYulei QiuNational Astronomical Observatories, Chaoyang District, Beijing 100012, ChinaJian‐Yan WeiNational Astronomical Observatories, Chaoyang District, Beijing 100012, ChinaY. UrataAcademia Sinica Institute of Astronomy and Astrophysics, Taipei 106, TaiwanD. NanniINAF/OARE. MaioranoINAF/IASF Bologna, 40129 Bologna, ItalyE. PalazziINAF/IASF Bologna, 40129 Bologna, ItalyG. GrecoDipartimento di Astronomia, Universite di Bologna, 40127 Bologna, ItalyCorrado BartoliniDipartimento di Astronomia, Universite di Bologna, 40127 Bologna, ItalyА. ГуарниериDipartimento di Astronomia, Universite di Bologna, 40127 Bologna, ItalyA. PiccioniDipartimento di Astronomia, Universite di Bologna, 40127 Bologna, ItalyG. PizzichiniINAF/IASF Bologna, 40129 Bologna, ItalyF. TerraSecond University of Roma “Tor Vergata,” ItalyKuntal MisraAryabhatta Research Institute of Observational Sciences (ARIES), Manora Peak, Nainital 263 129, IndiaB. C. BhattCenter for Research and Education in Science and Technology (CREST), Hosakote, Bangalore 562 114, IndiaG. C. AnupamaIndian Institute of Astrophysics, Bangalore 560 034, IndiaXiaohui FanSteward Observatory, University of Arizona, Tucson, AZ 85721-0065Linhua JiangSteward Observatory, University of Arizona, Tucson, AZ 85721-0065R. A. M. J. WijersAstronomical Institute, University of Amsterdam, 1098 SJ Amsterdam, NetherlandsD. ReichartDepartment of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599Hala A. EidDepartment of Physics and Astronomy, Clemson University, Clemson, SC 29634Ginger BryngelsonDepartment of Physics and Astronomy, Clemson University, Clemson, SC 29634J. PulsDepartment of Physics and Astronomy, Clemson University, Clemson, SC 29634R. C. GoldthwaiteDepartment of Physics and Astronomy, Clemson University, Clemson, SC 29634D. H. HartmannDepartment of Physics and Astronomy, Clemson University, Clemson, SC 29634

2008en

ABI

Аннотация

We report on multiwavelength observations, ranging from X-ray to radio wave bands, of the IPN-localized gamma-ray burst GRB 070125. Spectroscopic observations reveal the presence of absorption lines due to O I, Si II, and C IV, implying a likely redshift of z=1.547. The well-sampled light curves, in particular from 0.5 to 4 days after the burst, suggest a jet break at 3.7 days, corresponding to a jet opening angle of ~7.0/sup°, and implying an intrinsic GRB energy in the 1-10,000 keV band of around E/subγ=(6.3-6.9)×10/sup51 ergs (based on the fluences measured by the gamma-ray detectors of the IPN). GRB 070125 is among the brightest afterglows observed to date. The SED implies a host extinction of AV<0.9 mag. Two rebrightening episodes are observed, one with excellent time coverage, showing an increase in flux of 56% in ~8000 s. The evolution of the afterglow light curve is achromatic at all times. Late-time observations of the afterglow do not show evidence for emission from an underlying host galaxy or supernova. Any host galaxy would be subluminous, consistent with current GRB host galaxy samples. Evidence for strong Mg II absorption features is not found, which is perhaps surprising in view of the relatively high redshift of this burst and the high likelihood for such features along GRB-selected lines of sight.

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Идентификаторы

DOI: 10.1086/590236

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Цитирований: 3Использованных источников: 0

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