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GCN Circular 2717

XRF 040916, optical follow-up
2004-09-16T18:39:48Z (20 years ago)
Alberto Castro-Tirado at Astro. de Andalucia <>
A. de Ugarte Postigo, D. Reverte-Pay�, J. Gorosabel,
S. Guziy, M. Jel�nek, J. V�lchez and A. J. Castro-Tirado
(IAA-CSIC, Granada),


We have taken R-band frames covering the error box
for the long-lasting XRF 040916 detected by HETE-2
(Yamazaki et al., GCN Circ. 2712; Yamamoto et al.
GCN Circ. 2713).  A set of five images (300-s exposure
time each) was taken at the 2.5m INT (+WFC) on
La Palma during the time interval 16 Sep (02:50 UT -
04:06 UT, i.e. 2.87-4.05 hr after the burst). No new or
strongly variable object is found in the entire error box
down to R = 21, when comparing with the DSS-2 red.
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