TITLE: GCN GRB OBSERVATION REPORT NUMBER: 1271 SUBJECT: GRB020305: Subaru Optical Observations DATE: 02/03/14 19:02:06 GMT FROM: George Kosugi at Subaru Telescope Y. Ohyama, M. Yoshida, K. S. Kawabata, Y. Saito, A. D. Saga, and S. Harasawa on behalf of the FOCAS Team: G. Kosugi, Y. Mizumoto, M. Iye, R. Ogasawara, T. Takata, K. Sekiguchi, T. Yamada, N. Kobayashi, J. Watanabe, T. Totani, A. Yoshida, N. Kawai, Y. Urata, T. Tamagawa, K. Torii, J. Noumaru, Y. Komiyama, W. Aoki, and K. Motohara on behalf of the Subaru GRB Team: We have observed the afterglow candidate of GRB 020305 (GCN #1267) with the Subaru 8.2m telescope atop Mauna Kea at 2002 March 12.6 UT (7 days after the burst). Several R and I-band images were taken with the observing instrument FOCAS. The limitting magnitudes were approximately R=26 and I=25, respectively. We detected a point source of R=22.6 and I=22.1 within 1 arcsec from the position reported in GCN #1267. 7 USNO stars were used for R-band relative photometry. The magnitude in I-band, however, was estimated by simply converting the observed intensities empirically to the magnitude. Elongated diffuse nebulosity can be seen toward the northeast direction from the candidate. R and I-band images may be found at: http://www.naoj.org/staff/george/Distribute/GRB020305/GRB020305.html This message may be cited.