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GCN Circular 2961

GRB 041224 and GRB 041226: BOOTES-2 simultaneous observations
2005-01-18T19:01:22Z (20 years ago)
Alberto Castro-Tirado at Astro. de Andalucia <>
A. J. Castro-Tirado, M. Jel�nek, A. de Ugarte Postigo,
(IAA-CSIC Granada), S. Vitek (Czech Technical University, 
Prague), P. Kubanek  (Astronomical Institute of the Academy 
of Sciences, Ondrejov), T. J. Mateo Sanguino (Universidad 
de Huelva), J. M. Castro Cer�n (U. Copenhagen), T. Soria 
(EELM-CSIC, M�laga) and J. Fabregat (Universidad de Valencia)

The BOOTES-2 very wide field camera, located at the Estaci�n
Experimental de La Mayora (EELM-CSIC) in M�laga, observed 
the two regions of the sky containing the SWIFT/BAT error 
boxes for GRB 041224 (Barthelmy et al. GCN 2908) and GRB 
041226 (Krimm et al. GCN 2914) as part of its routine 
observing schedule. For GRB 041224 a 30 s exposure started 
at 20:21:00 UT (3 s after the onset of the 50 s long burst), 
with the following frame starting at 20:22:00 UT. For GRB
041226 the 30 s exposure started at 20:34:00 (19 s prior to 
the onset of the 20 s main emission peak). Limiting (unfiltered) 
magnitudes of 8.5 and 7.0 respectively (due to the presence 
of the full moon) are derived for any promt optical flash
arising from either of these two events.

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