[vsnet-grb-info 1840] GRB 050724: J-band observations

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3680
SUBJECT: GRB 050724: J-band observations
DATE:    05/07/26 01:21:06 GMT
FROM:    Javier Gorosabel at LAEFF-INTA, Madrid  <jgu at laeff.esa.es>

A. de Ugarte Postigo, J. Gorosabel, A.J. Castro-Tirado,
M. Jelinek, S. Guziy (IAA-CSIC),  H.-J. Roeser (MPI Heidelberg),
A. Aguirre, S. Pedraz (CAHA), O. Bogdanov (Nikolaev State Univ.),
report:

"We have observed the  field of GRB 050724 (GCN Circ. 3665) in the  
J-band with the 3.5m Calar Alto telescope (mean observing epoch July  
25.86 UT, Texp=45 min). A comparison with the images  taken yesterday 
with the same telescope (mean observing epoch July 24.87 UT, Texp=15  
min) did not reveal any variable source in the reported XRT error  
boxes (GCN Circ. 3678, 3665, 3669) down to J~20. At first epoch we 
note the presence of a possible object on our detection limit (J~20.5) 
located at RA(J2000)=16:24:45.02, DEC(J2000)=-27:32:29.1. However, the 
worse seeing on July 25.86 UT prevented us from confirming its 
potential variability."

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