[IAUC] CBET 1216: 20080120 : DWARF NOVA IN CANIS MINORIS

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                                                  Electronic Telegram No. 1216
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT en CFA.HARVARD.EDU (science)
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DWARF NOVA IN CANIS MINORIS
     H. Yamaoka, Kyushu University, reports that K. Itagaki (Yamagata, Japan)
has discovered a variable star (mag 12.3) on unfiltered CCD images obtained
with a 0.21-m reflector on Jan. 19.546 UT, the "new" object located at R.A.
= 7h47m27s.64, Decl. = +6o50'50".0 (equinox 2000.0; photometry and astrometry
apparently measured from an image obtained with a 0.30-m reflector).  Nothing
is visible at this position on Itagaki's image from 2007 Oct. 17 (limiting
mag 17.5), though a faint star of mag about 19.5 is within 1" of this
position in both the USNO-B1.0 and GSC 2.3.2 catalogues.  H. Naito and S.
Narusawa, Nishi-Harima Astronomical Observatory (NHAO), report (via Yamaoka)
that a low-resolution (R about 270) spectrum (range 410-670 nm), taken on
Jan. 19.63 UT with 2.0-m NAYUTA telescope at NHAO under hazy conditions,
shows a smooth, blue continuum with absorption lines of the Balmer series,
which indicates that the new variable is a dwarf nova in outburst; the
equivalent widths of H_beta and H_gamma are 0.6 and 0.7 nm.


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                         (C) Copyright 2008 CBAT
2008 January 20                  (CBET 1216)              Daniel W. E. Green