Journal article
GRB 120422A/SN 2012bz: Bridging the gap between low- and high-luminosity gamma-ray bursts
Astronomy & Astrophysics, Vol.566, A102
Jun/2014
Abstract
Context. At low redshift, a handful of gamma-ray bursts (GRBs) have been discovered with luminosities that are substantially lower (L-iso less than or similar to 10(48.5) erg s(-1)) than the average of more distant ones (L-iso greater than or similar to 10(49.5) erg s(-1)). It has been suggested that the properties of several low-luminosity (low-L) GRBs are due to shock break-out, as opposed to the emission from ultrarelativistic jets. This has led to much debate about how the populations are connected. Aims. The burst at redshift z = 0.283 from 2012 April 22 is one of the very few examples of intermediate-L GRBs with a gamma-ray luminosity of L-iso similar to 10(49.6-49.9) erg s(-1) that have been detected up to now. With the robust detection of its accompanying supernova SN 2012bz, it has the potential to answer important questions on the origin of low-and high-L GRBs and the GRB-SN connection. Methods. We carried out a spectroscopy campaign using medium-and low-resolution spectrographs with 6-10-m class telescopes, which covered a time span of 37.3 days, and a multi-wavelength imaging campaign, which ranged from radio to X-ray energies over a duration of similar to 270 days. Furthermore, we used a tuneable filter that is centred at H alpha to map star-formation in the host and the surrounding galaxies. We used these data to extract and model the properties of different radiation components and fitted the spectral energy distribution to extract the properties of the host galaxy. Results. Modelling the light curve and spectral energy distribution from the radio to the X-rays revealed that the blast wave expanded with an initial Lorentz factor of Gamma(0) similar to 50, which is a low value in comparison to high-L GRBs, and that the afterglow had an exceptionally low peak luminosity density of less than or similar to 2 x 10(30) erg s(-1) Hz(-1) in the sub-mm. Because of the weak afterglow component, we were able to recover the signature of a shock break-out in an
Details
- Title
- GRB 120422A/SN 2012bz; Bridging the gap between low- and high-luminosity gamma-ray bursts
- Creators
- S. Schulze (null)D. Malesani (null)A. Cucchiara (null)N. R. Tanvir (null)T. Kruhler (null)Ugarte Postigo, A. de Ugarte Postigo (null)Georgios Leloudas (null) - 972WIS_INST___88J. Lyman (null)D. Bersier (null)K. Wiersema (null)D. A. Perley (null)P. Schady (null)J. Gorosabel (null)J. P. Anderson (null)A. J. Castro-Tirado (null)S. B. Cenko (null)Cia, Annalisa De Cia (null) - The Weizmann Institute of ScienceL. E. Ellerbroek (null)J. P. U. Fynbo (null)J. Greiner (null)J. Hjorth (null)D. A. Kann (null)L. Kaper (null)S. Klose (null)A. J. Levan (null)S. Martin (null)P. T. O'Brien (null)K. L. Page (null)G. Pignata (null)S. Rapaport (null)R. Sanchez-Ramirez (null)J. Sollerman (null)I. A. Smith (null)M. Sparre (null)C. C. Thoene (null)D. J. Watson (null)Dong Xu (null) - 972WIS_INST___88E. E. Bauer (null)M. Bayliss (null)G. Bjornsson (null)M. Bremer (null)Z. Cano (null)S. Covino (null)V. D'Elia (null)D. A. Frail (null)S. Geier (null)P. Goldoni (null)O. E. Hartoog (null)P. Jakobsson (null)H. Korhonen (null)K. Y. Lee (null)B. Milvang-Jensen (null)M. Nardini (null)A. Nicuesa Guelbenzu (null)M. Oguri (null)S. B. Pandey (null)G. Petitpas (null)A. Rossi (null)A. Sandberg (null)S. Schmidl (null)G. Tagliaferri (null)R. P. J. Tilanus (null)J. M. Winters (null)D. Wright (null)E. Wuyts (null)
- Resource Type
- Journal article
- Publication Details
- Astronomy & Astrophysics, Vol.566, A102; Jun/2014
- Number of pages
- 31
- Language
- English
- DOI
- https://doi.org/10.1051/0004-6361/201423387
- Grant note
- Icelandic Research Fund; University of Iceland Research Fund; Dark Cosmology Centre; CONICYT through FONDECYT [3140534, 3110142]; Basal-CATA [PFB-06/2007]; Iniciativa Cientifica Milenio grant (Millennium Center for Supernova Science) [P10-064-F]; "Millennium Institute of Astrophysics (MAS)" of Iniciativa Cientifica Milenio del Ministerio de Economia, Fomento y Turismo de Chile [IC120009]; "Fondo de Innovacion para la Competitividad, del Ministerio de Economia, Foment y Turismo de Chile"; CONICYT-Chile FONDECYT [1101024]; Instrument Center for Danish Astrophysics; European Commission under the Marie Curie Intra-European Fellowship Programme; ERC-StG [EGGS-278202]; UK Space Agency; Swedish Research Council [623-2011-7117]; UK Science and Technology Facilities Council; Spanish research project [AYA2012-39362-C02-02, AYA2009-14000-C03-01, AYA2012-39727-C03-01]; European Commission under the Marie Curie Career Integration Grant programme [FP7-PEOPLE-2012-CIG 322307]; DFG cluster of excellence "Origin and Structure of the Universe" - Thuringer Landessternwarte Tautenburg; Thuringer Landessternwarte Tautenburg; Alexander von Humboldt Foundation of Germany; DFG [KL 766/16-1, HA 1850/28-1]; Thuringer Ministerium fur Bildung, Wissenschaft und Kultur [FKZ 12010-514]; Danish National Research Foundation; Spitzer/NASA grant RSA [1287913]; NSF [GN-2012A-Q-9, GN-2012A-Q-39, GN-2012B-Q-5, GS-2012A-Q-30, GS-2012A-Q-38]; Nordic Optical Telescope (NOT); Instituto de Astrofisica de Canarias [P45-002, ITP10-04]; Gran Telescopio Canarias (GTC) in the Spanish Observatorio del Roque de los Muchachos of the Instituto de Astrofisica de Canarias in the island of La Palma; Magellan [CN2012A-059]; TRAM Plateau de Bure Interferometer; James Clerk Maxwell Telescope [M12AI12]; XMM-Newton, an ESA science mission; ESA Member States; NASA; W.M. Keck Foundation; Science and Technology Facilities Council of the United Kingdom; National Research Council of Canada; Netherlands Organisation for Scienti_ALMAME_DELIMITER_
- Record Identifier
- 993262240403596
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