Gamma-Ray Burst Optical Afterglow Observations at Nyrola, Observatory (Abstract)

Volume 33 number 1 (2005)

Arto Oksanen

P. Tikkanen

M. Aho

H. Hyv"nen

M. Moilanen

Abstract

(Abstract only) The GRB team of Nyrölä Observatory has been involved with gamma-ray bursts since 1999, when the observatory joined the GRB Coordinates Network. Since then twenty GRB fields have been imaged, four of them showing optical afterglows and sixteen upper-limit observations. The observers also joined the AAVSO International High Energy Network in 2000. The optical afterglows of GRB 000926, GRB 010222, GRB 021004, and GRB 030329 have been successfully observed. A table of all observations with delay from the burst and the magnitude or optical upper limit is presented. Fourteen GCN Circulars have been issued by the authors.