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 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), M. Cerviño, 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 (10:12-10:41 UT, i.e. 24.8 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." This message can be quoted. [GCN OPS NOTE(31mar09): Per author's request, the numerical values of the times (which were local time) were converted to true UT time values; the "36.8 hrs" was changed to "24.8"; and Cervino was added to the author list.]