[vsnet-grb-info 7499] GRB 090328: BOOTES-3 optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9058
SUBJECT: GRB 090328: BOOTES-3 optical observations
DATE:    09/03/30 23:58:43 GMT
FROM:    Alberto Castro-Tirado at Inst.de Astro. de Andalucia  <ajct at iaa.es>

Bill Allen (Vintage Lane Obs., Blenheim, New Zealand), Phil Yock (Auckland
Univ., NZ), A. de Ugarte Postigo (ESO Santiago), Ian Bond (Massey Univ., 
NZ),
John Hearnshaw (Univ. of Canterbury, NZ), Grant Christie (Stardome Obs., 
NZ),
Petr Kubánek (GACE, Univ. of Valencia), S. Castillo (Univ. de Málaga),
J. M. Castro Cerón (ESAC Madrid), T. Mateo Sanguino (Univ. de Huelva),
D. Pérez-Ramírez (Univ. de Jaén), A. Claret, J. M. García Pelayo, J. 
Gorosabel,
S. Guziy, M. Jelínek, S. Martín Ruiz and A. J. Castro-Tirado (IAA-CSIC 
Granada), report:

"Following the detection by Fermi LAT and GBM of GRB 090328 (McEnery
et al. GCNC 9044), follow-up observations were performed by the 0.6-m
Yock-Allen robotic telescope at the new BOOTES-3 astronomical station in
Blenheim (New Zealand). A co-added 1500s unfiltered image, obtained on
29 Mar (22:12-22:41 UT, i.e. 36.8 hr after the onset of the event) shows 
a rather
bright optical afterglow at the UVOT position reported by Kennea et al. 
(GCNC
9046). We measure R~19.7+/-0.3 (clear filter), calibrated against USNO-B1.0
stars.  Additional observations are encouraged."

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