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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2210
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dc.contributor.authorde Ugarte, Postigo A.-
dc.contributor.authorFatkhullin, T.A.-
dc.contributor.authorBhattacharya, D.-
dc.contributor.authorKamble, Atish P.-
dc.contributor.author+39 Co-authors-
dc.date.accessioned2007-03-16T09:52:49Z-
dc.date.available2007-03-16T09:52:49Z-
dc.date.issued2007-02-
dc.identifier.citationAstronomy and Astrophysics, 2007, Vol.462, pL57-L60en
dc.identifier.urihttp://hdl.handle.net/2289/2210-
dc.descriptionOpen Access.en
dc.description.abstractAims.Understand the shape and implications of the multiband ligth curve of GRB 050408, an X-ray rich (XRR) burst. Methods: .We present a multiband optical light curve, covering the time from the onset of the γ-ray event to several months after, when we only detect the host galaxy. Together with X-ray, millimetre and radio observations we compile what, to our knowledge, is the most complete multiband coverage of an XRR burst afterglow to date. Results: .The optical and X-ray light curve is characterised by an early flattening and an intense bump peaking around 6 days after the burst onset. We explain the former by an off-axis viewed jet, in agreement with the predictions made for XRR by some models, and the latter with an energy injection equivalent in intensity to the initial shock. The analysis of the spectral flux distribution reveals an extinction compatible with a low chemical enrichment surrounding the burst. Together with the detection of an underlying starburst host galaxy we can strengthen the link between XRR and classical long-duration bursts. Based on observations collected at SAO, La Silla, Roque de los Muchachos, Haleakala, Kitt Peak, Cerro Tololo, TÜBITAK, Kiso, Observatorio de Sierra Nevada, Plateau du Bure, GMRT and RATAN-600. Appendices A and B are only available in electronic form at http://www.aanda.orgen
dc.format.extent439581 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherEDP Sciencesen
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?2007A&A...462L..57Den
dc.relation.urihttp://arxiv.org/abs/astro-ph/0612545en
dc.relation.urihttp://dx.doi.org/10.1051/0004-6361:20066660en
dc.rights2007 EDP Sciencesen
dc.subjectgamma rays: burstsen
dc.subjecttechniques: photometricen
dc.titleExtensive mutiband study of the X-ray rich GRB 050408: A likely off-axis event with an intense energy injectionen
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

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