[vsnet-chat 7092] XRF 050509c: Optical monitoring

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  3546
SUBJECT: XRF 050509c: Optical monitoring
DATE:    05/06/14 09:43:49 GMT
FROM:    Javier Gorosabel at IAA-CSIC  <jgu at iaa.es>

J. Gorosabel (IAA-CSIC), J. Hjorth, B. L. Jensen, U. G. Jørgensen (NBI),
J.-P. Beaulieu, A. Cassan (IAP), M. I. Andersen (AIP),
J. Donatowicz (Tech. Uni. of Vienna), D. Watson, J. P. U. Fynbo,
P. Jakobsson, J. M. Castro Cerón, H. Pedersen (NBI), report:

"We have performed almost daily R-band monitoring of the XRF 050509c
field (GCN Circ. 3402, HETE-2 trigger #3751) from May 15 to June 8.
No significant rebrightening brighter than R ~ 22.5 has been detected at
the afterglow position (GCN Circ. 3425) during the mentioned period.

If XRF 050509c was related to a supernova similar to SN 1998bw, our
observations would imposse a lower redshift limit of z > 0.4.

A combination of all late images 
(www.astro.ku.dk/~brian_j/grb/grb050509.95/)
reveals a faint (R ~ 24) object coincident with the afterglow position,
which we tentatively identify as the host galaxy of XRF 050509c."