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TITLE: GCN GRB OBSERVATION REPORT NUMBER: 2305 SUBJECT: GRB030329: Subaru Optical Spectroscopy DATE: 03/07/18 00:01:53 GMT FROM: George Kosugi at Subaru Telescope <george@subaru.naoj.org> G. Kosugi, Y. Mizumoto, Y. Ohyama, K. S. Kawabata, and K. Aoki (Subaru Telescope, NAOJ), report: Spectra of GRB 030329 (H2656, Vanderspek et al, GCN 1997) optical transient (Peterson & Price, GCN 1985) were obtained using the Subaru 8.2m telescope and FOCAS (Faint Object Camera And Spectrograph) with the wavelength coverage of 4700 to 9400A (R=700) on June 22.3 UT (85 days after the burst). Compared with the previous data (May 8 and 9 UT : 40 days after the burst, Kawabata et al. IAUC 8133), we found that several nebular phase lines ([OI] 6300/6364, [CaII] 7291/7323, etc.) began to emerge out of the photospheric phase supernova spectrum. This message may be cited.
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