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GCN Circular 2263

Subject

GRB 030519B: optical observations.

Date

2003-06-01T23:35:30Z (21 years ago)

From

Javier Gorosabel at LAEFF-INTA, Madrid <jgu@laeff.esa.es>

J. Gorosabel (IAA-CSIC/STScI), A. Levan (U. Leicester/STScI),
 A. de Ugarte Postigo (IAA-CSIC), A.J. Castro-Tirado (IAA-CSIC),
 A. Fruchter (STScI), S. Guziy (IAA-CSIC), J.M. Castro Cer�n (STScI),
 A. Guijarro (CAHA), A. Aguirre (CAHA), M. Alises (CAHA) report:

 "We have carried out observations of the central part (coverage
 ~75%) of the GRB 030519B (GCN 2235Not found
 
 
) error box, in four
 optical bands, with the 2.2m (+BUSCA) telescope at the 
 Observatorio de Calar Alto. Three of these four bands are non
 standard and calibration is still pending. The fourth one 
 corresponds to Ic, with photometry as follows:

 ---------------------------------------------
      Date                           Texp     Seeing  Lim. Mag.
      (May 2003 UT)            (s)         (")        (3 sigma)
 ---------------------------------------------
     21.03872--21.06376  3x600   2.0      23.3
     21.99519--22.07959  7x600   2.2      23.5
     22.98905--23.07625  5x900   3.1      23.3
     24.00387--24.03936  3x900   2.3      23.3
 ---------------------------------------------

 PSF matched subtraction did not reveal any reliable afterglow
 candidate brighter than Ic ~ 23, implying that this burst likely
 belongs to the dark GRB class."

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