Electronic Telegram No. 1980
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)
URL http://www.cfa.harvard.edu/iau/cbat.html


NOVA IN M31:  2009-10b
     H. Yamaoka, Kyushu University; K. Ayani, Bisei Astronomical Observatory
(BAO); and S. Honda and K. Kinugasa, Gunma Astronomical Observatory (GAO),
report that low-resolution spectra of M31N 2009-10b (cf. CBETs 1967, 1971,
1973) were obtained on Oct. 15.6 UT with the BAO 1.01-m telescope and on Oct.
15.5 with the GAO 1.5-m telecsope.  These show an almost-featureless blue
continuum with narrow P-Cyg profiles of Balmer lines, which strongly resemble
those of the fast nova V1280 Sco at two days before maximum light (Naito
and Narusawa, IAUC 8803).
     Additional CCD magnitudes for 2009-10b:  Oct. 12.940, R_c = 15.93 +/-
0.11 (M. Martignoni, Milano, Italy); 13.924, R_c = 15.28 +/- 0.07
(Martignoni); 14.923, R_c = 14.96 +/- 0.06 (Martignoni); 15.824, 14.9 (K.
Itagaki, Yamagata, Japan; via Yamaoka; unfiltered); 16.500, 14.6 (Itagaki);
16.797, R_c = 14.69 +/- 0.05 (Martignoni).


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2009 CBAT
2009 October 18                  (CBET 1980)              Daniel W. E. Green