[vsnet-grb-info 9195] GRB 100424A: D50 optical limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  10681
SUBJECT: GRB 100424A: D50 optical limits
DATE:    10/04/25 09:35:32 GMT
FROM:    Jan Strobl at AI AS CR,Ondrejov  <jan at strobl.cz>

Jan Strobl (1), Martin Jelinek (2), Cyril Polasek (1), Petr Kubanek (2,3),
Martin Nekola (1), Matus Kocka (1), Michal Jakubec (1) and Rene Hudec (1)
(1. ASU AVCR Ondrejov, 2. IAA Granada, 3. GACE Valencia)

We observed the field of Swift GRB 100424A (Hoversten et al., GCNC 10667) 
with the 0.5m telescope D50 in Ondrejov (Czech Republic), starting at 
23:27:02 UT, i.e. 06:54:20 after the trigger. A sequence of 20s unfiltered 
images was obtained. We coadded 60x20s exposure, obtaining an image with a 
limitting magnitude Rc~19.3, with an effective exposure time 7.35h after 
the trigger (23:54UT). We do not detect any new source within the XRT 
localization (Evans et al., GCN10699).

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