Electronic Telegram No. 923
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
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GW LIBRAE
     S. Narusawa, H. Naito, and M. Sakamoto, Nishi-Harima Astronomical
Observatory; and A. Imada and D. Nogami, Kyoto University, report that
low-resolution spectra (exposure time 3600 sec) of GW Lib (cf. CBET
922, IAUC 8829) were obtained on Apr. 12.677 and 12.758 UT (before
maximum light) with the 2.0-m NAYUTA telescope + MALLS (range 410-670
nm; resolution 370 at H_alpha) under hazy conditions.  The low-S/N
spectra show absorption lines of the Balmer series (equivalent widths
of H_alpha and H_beta are 0.6 nm and 1.13 nm on Apr. 12.677, and 0.5
nm and 0.8 nm on Apr. 12.758), supporting the classification of GW Lib
as a dwarf nova.


NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2007 CBAT
2007 April 13                    (CBET 923)               Daniel W. E. Green