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GCN Circular 415

Subject
GRB 990907 optical observations
Date
1999-09-26T09:08:01Z (25 years ago)
From
Alberto Castro-Tirado at LAEFF-INTA <ajct@laeff.esa.es>
GRB 990907, optical observations
--------------------------------------

Javier Gorosabel, LAEFF-INTA (Madrid)
Alberto Castro-Tirado, LAEFF-INTA (Madrid) and IAA-CSIC (Granada) 
Ian Bond, Nick Rattembury and Phil Yock, University of Auckland 
Pam Kilmartin, University of Canterbury
T. Sumi (Japan)
Hernan Muriel, IATE (Cordoba)
Enrico Costa, IAS (Frascati), on behalf of the BSAX team 

report:

"We have obtained three 10-minute exposures of the BeppoSAX 
position of GRB 990907 (Gandolfi et al. GCN 404, 405) with the 
0.61-m Mount John University Observatory (MJUO) telescope. 
The images were taken on Sep 9.40 UT through a broad band filter 
(R + I bandpass). After a visual comparison with the Digital Sky 
Survey, no sources varying by more than 0.3 mag were seen to the 
DSS-2 limit within the BSAX NFI error box (GCN 409) in agreement 
with the negative results provided by Palazzi et al. (GCN 413)."
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