Other
Scientific paper
Oct 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sptz.prop80234l&link_type=abstract
Spitzer Proposal ID #80234
Other
Scientific paper
We seek a rapid response target of opportunity observation of the recent GRB 111005A, which was detected by Swift last week. The burst is essentially invisible to most ground and space based optical/IR observations because it lies only 35 degrees from the Sun (as viewed from Earth). However, its gamma-ray error box contains the bright low redshift galaxy ESO 580-49, at only ~55 Mpc distance. Short integration (twilight) K-band observations do not show any sign of the burst in the optical/IR in the night after it occurred, perhaps because of extinction, or possibly because observations were too early to catch the associated supernova (SN). Howeve, radio observations today (10 Oct) do locate a transient source within the galaxy, presumably the GRB afterglow. This makes GRB 1110005A the closest Swift-GRB by some margin, and the second closest of all time. Such bursts provide a Rosetta Stone for our understanding of the GRB phenomena, since their proximity allows exquisite data to be obtained, and for late time observations to fully characterise the nature of the stellar population. Unlike other observatories, Spitzer can observe GRB 111005A until the end of the 14th October, providing an opportunity to search for an associated SN at optical and IR wavelengths, and even probe through the dust that may be present in the host galaxy. This is a unique opportunity, and a role that only Spitzer can perform.
Fynbo Johan
Hjorth Jens
Levan Andrew
Malesani Daniele
Tanvir Nial
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