TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2136 SUBJECT: GRB 030329 Rc observations DATE: 03/04/14 15:53:59 GMT FROM: Corrado Bartolini at Universita di Bologna TITLE: GCN GRB OBSERVATION REPORT SUBJECT: GRB 030329: Rc photometry in Loiano G. Pizzichini and P. Ferrero (IASF/CNR, Bologna), C. Bartolini, A. Guarnieri, A. Piccioni (Bologna University), A. Righini (Firenze University) and I. Bruni (Bologna Astronomical Observatory) report: We observed the optical afterglow (Peterson & Price, GCN 1985) of GRB 030329 (Vanderspek et al., GCN 1997), using the 152cm telescope + BFOSC of the Astronomical Observatory in Loiano (Italy), Seeing was ~ 1.5", but observing conditions were limited, due to the low angular distance to the moon and the not perfect weather conditions. We co-added the three exposures listed below: UT start exptime filter ----------------------------- Apr. 13.8783 300s Rc Apr. 13.8824 300s Rc Apr. 13.8865 300s Rc and used the following stars in Henden's photometric calibration (GCN2082): RA= 161.174977 DEC= 21.542124 RA= 161.158874 DEC= 21.562989 RA= 161.162639 DEC= 21.516308 RA= 161.166023 DEC= 21.570694 We obtain a preliminary magnitude Rc = 18.66 +/- 0.11. This message may be cited.