[vsnet-grb-info 15759] GRB 141109B: BOOTES-4 and TERSKOL optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  17047
SUBJECT: GRB 141109B: BOOTES-4 and TERSKOL optical upper limit 
DATE:    14/11/09 22:02:16 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct at iaa.es>

I.V. Sokolov, A. Moskvitin, V.V. Sokolov (SAO-RAS Zelenchukaja, Russia),
S. Guziy (Nikolaev Univ. Obs., Ukraine), A.J. Castro-Tirado, J.C. Tello
(IAA-CSIC Granada, Spain), Y. Fan, X. Zhao, J. Bai, Ch. Wang and Y. Xin
(Yunnan National Astronomical Observatory, China) on behalf of a larger
collaboration, report:

Following the detection of GRB 141109B by Swift/BAT (Melandri et al., GCNC
17038), the robotic 0.6m MET telescope at the BOOTES-4 station, in Lijiang
Astronomical Observatory (China) responded to the event after the sunset,
with the first images being obtained about 3.5 h post-burst. Additional
R-band images (6 x 300s) were taken at the 2.0m Terskol telescope in the
Northern Caucasus starting 11.3 hr post-burst. No optical source is
detected at the refined Swift/XRT position (Beardmore et al., GCNC 17045)
down to the DSS limit. Observations at longer wavelengths are encouraged.