TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  501
SUBJECT: GRB991217/SAX J2303.2+0015, optical observations
DATE:    99/12/20 09:49:49 GMT
FROM:    Nicola Masetti at ITeSRE,CNR,Bologna  <masetti@tesre.bo.cnr.it>

C. Bartolini, A. Guarnieri, A. Piccioni (Dip. Astronomia, U. of Bologna),
A. De Blasi (Oss. Astron. Bologna) and N. Masetti (ITeSRE-CNR, Bologna)
report:


"Five R-band images of the BeppoSAX WFC error box of GRB991217/SAX
J2303.2+0015 (Muller et al. 1999,  GCN #474) were obtained with the
Bologna Astronomical Observatory 1.5-meter telescope equipped with BFOSC
between Dec. 17.727 and 17.814, for a total exposure time of 55 min.

These observations, which started about 13 hours after the high-energy
event, were summed together and compared with the DSS-2.
Altought somewhat deeper than the DSS-2, the summed R frame does not show
any remarkable new object."


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