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A deep search with the Hubble Space Telescope for late-time supernova signatures in the hosts of XRF 011030 and XRF 020427

Levan, A and Patel, S and Kouveliotou, C and Fruchter, A and Rhoads, J and Rol, E and Ramirez-Ruiz, E and Gorosabel, J and Hjorth, J and Wijers, R and Wood-Vasey, WM and Bersier, D and Castro-Tirado, A and Fynbo, J and Jensen, B and Pian, E and Tanvir, N and Thorsett, S and Woosley, S (2005) A deep search with the Hubble Space Telescope for late-time supernova signatures in the hosts of XRF 011030 and XRF 020427. Astrophysical Journal, 622 (2). ISSN 0004-637X

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Abstract

X-ray flashes (XRFs) are, like gamma-ray bursts (GRBs), thought to signal the collapse of massive stars in distant galaxies. Many models posit that the isotropic equivalent energies of XRFs are lower than those for GRBs, such that they are visible from a reduced range of distances when compared with GRBs. Here we present the results of two-epoch Hubble Space Telescope imaging of two XRFs. These images, taken approximately 45 and 200 days postburst, reveal no evidence of an associated supernova in either case. Supernovae such as SN 1998bw would have been visible out to z ~ 1.5 in each case, while fainter supernovae such as SN 2002ap would have been visible to z ~ 1. If the XRFs lie at such large distances, their energies would not fit the observed correlation between the GRB peak energy and isotropic energy release (Ep ∝ Eimg1.gif), in which soft bursts are less energetic. We conclude that, should these XRFs reside at low redshifts (z < 0.6), either their line of sight is heavily extinguished, they are associated with extremely faint supernovae, or, unlike GRBs, these XRFs do not have temporally coincident supernovae.

Item Type: Article
Uncontrolled Keywords: 0201 Astronomical And Space Sciences, 0305 Organic Chemistry, 0306 Physical Chemistry (Incl. Structural)
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: American Astronomical Society; IOP Publishing
Related URLs:
Date Deposited: 28 Nov 2016 11:45
Last Modified: 13 Sep 2017 16:15
DOI or Identification number: 10.1086/426938
URI: http://researchonline.ljmu.ac.uk/id/eprint/4881

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