[vsnet-grb-info 6090] GRB 080514B: slow fading behaviour ?

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  7724
SUBJECT: GRB 080514B: slow fading behaviour ?
DATE:    08/05/15 09:35:14 GMT
FROM:    Aybuke, Kupcu Yoldas at MPE  <ayoldas at mpe.mpg.de>

A. Rossi (Tautenburg), A. Kupcu-Yoldas, J. Greiner (MPE Garching),
S. Klose, R. Filgas (Tautenburg), A. Yoldas, T. Kruehler (MPE), and
G. Szokoly (Eoetvoes Univ. Budapest and MPE)
report on behalf of the GROND team:

We continued observing the field of GRB 080514B (Rapisarda et al.,  
GCN 7715; Giuliani
et al., GCN 7716) simultaneously in g'r'i'z'JHK using the multi-channel
imager GROND (Greiner et al. 2008, PASP 120, 405) mounted at the 2.2m
MPI/ESO telescope on La Silla (Chile).

We detect a very slow fading behaviour in the afterglow brightness.
The i' band magnitude dropped ~0.05 magnitudes within 1.5 hours,  
resulting in i'~20.9 around 08:20 UT. This magnitude is ~0.5  
magnitudes fainter than the i-band magnitude given by Ugarte et al.  
(GCN 7719).

Please note that the g' magnitude mentioned in GCN 7722 has a typo;  
it should be g' = 21.2.