Constraints on an Optical Afterglow and on Supernova Light Following the Short Burst GRB 050813

Authors

P. Ferreo, Thüringer Landessternwarte Tautenburg
S. F. Sanchez, Centro Astronómico Hispano Alemán de Calar Alto
D. A. Kann, Thüringer Landessternwarte Tautenburg
S. Klose, Thüringer Landessternwarte Tautenburg
J. Greiner, Max-Planck Institut für Extraterrestrische Physik
J. Gorosabel, Institutode Astrofísicade Andalucıá (IAA-CSIC
Dieter H. Hartmann, Department of Physics and Astronomy, Clemson UniversityFollow
A. A. Henden, US Naval Observatory/ Universities Space Research Association, FlagstaffStation
P. Møller, European Southern Observatory
E. Palazzi, INAF-Istitutodi Astrofisica Spaziale e Fisica Cosmicadi Bologna

Document Type

Article

Publication Date

Winter 12-1-2007

Publication Title

The Astrophysical Journal

Volume

134

Issue

6

Publisher

The American Astronomical Society

Abstract

We report early follow-up observations of the error box of the short burst GRB 050813 using the telescopes at Calar Alto and Observatorio Sierra Nevada, followed by deep VLT FORS2 I-band observations obtained under very good seeing conditions 5.7 and 11.7 days after the event. Neither a fading afterglow nor a rising SN component was found, so the potential GRB host galaxy has not been identified based on a comparison of the two VLT images taken at different epochs. We discuss whether any of the galaxies present in the original 1000 XRTerror circle could be the host.In anycase, the optical afterglow of GRB 050813 was of very low luminosity. We conclude that all these properties are consistent with the binary compact merger hypothesis for the progenitor of GRB 050813.

Comments

Additional authors: A. Rau, B. Stecklum, A. J. Castro-Tirado, J. P. U. Fynbo, J. Hjorth, P. Jakobsson, C. Kouveliotou, N. Masetti, E. Pian, N. R. Tanivr, R. A. M. J. Wuers

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