Observational constraints on the afterglow of GRB 020531
Centre d'Étude Spatiale des Rayonnements, Observatoire Midi-Pyrénées (CNRS-UPS), BP 4346, 31028 Toulouse Cedex 04, France
2 Laboratoire d'Astrophysique, Observatoire Midi-Pyrénées (CNRS-UPS), 14 avenue E. Belin, 31400 Toulouse, France
Corresponding author: A. Klotz, firstname.lastname@example.org
Accepted: 17 January 2003
We present the data acquired by the TAROT automated observatory on the afterglow of GRB 020531. Up to now, no convincing afterglow emission has been reported for this short/hard GRB at any wavelength, including X-ray and optical. The combination of our early limits, with other published data allows us to put severe constraints on the afterglow magnitude and light curve. The limiting magnitude is 18.5 in R band, 88 min after the GRB, and the decay slope power law index could be larger than 2.2.
Key words: gamma-ray : bursts
© ESO, 2003