TITLE: GCN GRB OBSERVATION REPORT NUMBER: 575 SUBJECT: GRB000301c optical observations DATE: 00/03/03 23:09:35 GMT FROM: Christian Veillet at CFHT Sorry... I didn't use the right address for my posting! Just sent it to Scott... Aloha Christian ------------------------------ GRB000301c optical observations The candidate for the optical transient (OT) associated with the gamma ray burst GRB000301c has been observed in imaging mode with MOS on the 3.6-m CFH Telescope in the course of the French GRB follow-up program at CFHT (M. Boer, CESR, C. Veillet, CFHT). Relative photometry in B and R with respect to the reference star A (GCN573) is as following: delta B = 1.29 +/- 0.05 2000 March 3.50 (UTC) delta R = 2.19 +/- 0.05 2000 March 3.51 (UTC) The R magnitude inferred from star A magnitude determination in GCN573 is 20.24 +/-.07, in good agreement with the GCN 573 value of R = 20.28 +\- 0.05 measured at the same epoch. B and R images can be found at http://www.cfht.hawaii.edu/~veillet/grb.html B calibrations will be made tonight if no multicolor photometry is made available for reference stars in the field. D. Elbaz and H. Flores are acknowledged for their help in these observations. This message may be cited. -- ************************************************************ Dr. Christian Veillet, CFHT Senior Resident Astronomer Phone: (808) 885-3161 http://www.cfht.hawaii.edu/~veillet/ ************************************************************