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Multi-wavelength observations of the energetic GRB 080810: detailed mapping of the broadband spectral evolution

Page, K. L. and Howard, A. W. (2009) Multi-wavelength observations of the energetic GRB 080810: detailed mapping of the broadband spectral evolution. Monthly Notices of the Royal Astronomical Society, 400 (1). pp. 134-146. ISSN 0035-8711. https://resolver.caltech.edu/CaltechAUTHORS:20170705-073316048

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Abstract

GRB 080810 was one of the first bursts to trigger both Swift and the Fermi Gamma-ray Space Telescope. It was subsequently monitored over the X-ray and UV/optical bands by Swift, in the optical by Robotic Optical Transient Search Experiment (ROTSE) and a host of other telescopes, and was detected in the radio by the Very Large Array. The redshift of z= 3.355 ± 0.005 was determined by Keck/High Resolution Echelle Spectrometer (HIRES) and confirmed by RTT150 and NOT. The prompt gamma/X-ray emission, detected over 0.3–10^3 keV, systematically softens over time, with E_(peak) moving from ∼600 keV at the start to ∼40 keV around 100 s after the trigger; alternatively, this spectral evolution could be identified with the blackbody temperature of a quasi-thermal model shifting from ∼60 to ∼3 keV over the same time interval. The first optical detection was made at 38 s, but the smooth, featureless profile of the full optical coverage implies that this is originated from the afterglow component, not from the pulsed/flaring prompt emission. Broad-band optical and X-ray coverage of the afterglow at the start of the final X-ray decay (∼8 ks) reveals a spectral break between the optical and X-ray bands in the range of 10^(15)–2 × 10^(16) Hz. The decay profiles of the X-ray and optical bands show that this break initially migrates blueward to this frequency and then subsequently drifts redward to below the optical band by ∼3 × 10^5 s. GRB 080810 was very energetic, with an isotropic energy output for the prompt component of 3 × 10^(53) and 1.6 × 10^(52) erg for the afterglow; there is no evidence for a jet break in the afterglow up to 6 d following the burst.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1111/j.1365-2966.2009.15462.xDOIArticle
https://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2009.15462.xPublisherArticle
https://arxiv.org/abs/0907.4578arXivDiscussion Paper
ORCID:
AuthorORCID
Page, K. L.0000-0001-5624-2613
Howard, A. W.0000-0001-8638-0320
Additional Information:© 2009 The Authors. Accepted 2009 July 27. Received 2009 July 27; in original form 2009 May 22. The authors gratefully acknowledge support for this work at the University of Leicester by STFC, in Italy by funding from ASI and at PSU by NASA contract NAS5-00136. ER thanks the NOVA-3 network for support. JXP is partially supported by NASA/Swift grant NNX07AE94G. ROTSE-III has been supported by NASA grant NNG-04WC41G and the Australian Research Council and ESR would like to thank the TABASGO Foundation. AJvdH was supported by an appointment to the NASA Postdoctoral Program at the MSFC, administered by Oak Ridge Associated Universities through a contract with NASA. FY was supported by NASA Swift Guest Investigator grants NNG-06GI90G and NNX-07AF02G. The DARK cosmology centre is funded by the DNRF. This paper is partly based on observations made with the Nordic Optical Telescope, operated on the island of La Palma jointly by Denmark, Finland, Iceland, Norway and Sweden, in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. This work is partly based on observations with the INT, operated on the island of La Palma by the Isaac Newton Group in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias. We also thank P. Chandra and D. Frail for help with the radio data, G. Marcey and D. Fischer for scheduling the ToO during their Keck observing time, Peter Jonker for performing the INT/WFC observations and C. Thöne for working on the data from the NOT and Danish telescope. We extend our thanks to the whole of the Fermi-GBM team for their work on this new mission. Finally, we thank the anonymous referee for their detailed comments, which improved the paper.
Funders:
Funding AgencyGrant Number
Science and Technology Facilities Council (STFC)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
NASANAS5-00136
NASANNX07AE94G
NASANNG-04WC41G
TABASGO FoundationUNSPECIFIED
NASA Postdoctoral ProgramUNSPECIFIED
NASANNG-06GI90G
NASANNX-07AF02G
Danish National Research FoundationUNSPECIFIED
Subject Keywords:gamma-rays: bursts, X-rays: individual: GRB 080810
Issue or Number:1
Record Number:CaltechAUTHORS:20170705-073316048
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170705-073316048
Official Citation:K. L. Page, R. Willingale, E. Bissaldi, A. de Ugarte Postigo, S. T. Holland, S. McBreen, P. T. O'Brien, J. P. Osborne, J. X. Prochaska, E. Rol, E. S. Rykoff, R. L. C. Starling, N. R. Tanvir, A. J. Van Der Horst, K. Wiersema, B. Zhang, F. J. Aceituno, C. Akerlof, A. P. Beardmore, M. S. Briggs, D. N. Burrows, A. J. Castro-Tirado, V. Connaughton, P. A. Evans, J. P. U. Fynbo, N. Gehrels, C. Guidorzi, A. W. Howard, J. A. Kennea, C. Kouveliotou, C. Pagani, R. Preece, D. Perley, I. A. Steele, F. Yuan; Multiwavelength observations of the energetic GRB 080810: detailed mapping of the broad-band spectral evolution. Mon Not R Astron Soc 2009; 400 (1): 134-146. doi: 10.1111/j.1365-2966.2009.15462.x
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ID Code:78744
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:05 Jul 2017 22:05
Last Modified:03 Oct 2019 18:11

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