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IAUC 8907: V459 Vul = N Vul 2007 No. 2; V723 Cas; M31N 2007-12b

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                                                  Circular No. 8907
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://www.cfa.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)

     S. Nakano, Sumoto, Japan, reports the discovery by Hiroshi
Kaneda (Sapporo, Japan) of an apparent nova (mag 8.7) on three 4-s
unfiltered CCD frames taken on 2007 Dec. 25.35 UT using a Nikon D40
digital camera (+ 105-mm f/2.5 lens), with an apparent independent
discovery made by A. Tago at mag 8.3 on his two patrol frames taken
on Dec. 26.38 using a Canon 20D digital camera (+ Pentax 105-mm
f/3.2 lens).  Nakano's measurement of the variable from Tago's
image yielded the position R.A. = 19h48m08s.81, Decl. =
+21o15'29".9 (equinox 2000.0) and mag 7.8.  Additional CCD
magnitudes:  Dec. 8, [10-11 (Kaneda); 26.342, 7.1 (K. Itagaki,
Yamagata, Japan, 0.60-m f/5.7 reflector; position end figures
08s.84, 27".6); 26.355, 7.7 (Kaneda; position end figures 08s.89,
26".8).  Kaneda and K. Kadota (Ageo, Japan) note that a USNO-B1.0-
catalogue star has position end figures 08s.871, 26".81 and mag
about 20.  Spectroscopy by numerous observers, as reported by H.
Yamaoka and U. Munari on CBETs 1181 and 1183, confirm the object as
a nova.  Visual magnitude estimates for V459 Vul by A. Pereira,
Cabo da Roca, Portugal:  Dec. 26.79, 8.0; 27.79, 7.7; 30.80, 7.9.

     S. Mazuk, R. J. Rudy, D. K. Lynch, A. M. Gilbert, and T. R.
Prater, The Aerospace Corporation; R. B. Perry, Langley Research
Center, NASA; R. C. Puetter, University of California, San Diego;
G. Schwarz, West Chester University; and C. E. Woodward, University
of Minnesota, report 0.47- to 2.5-micron spectroscopy of V723 Cas
(cf. IAUC 8676) on 2007 Dec. 15 UT using VNIRIS on the Lick 3-m
telescope.  This long-lived, super-soft x-ray source is faint but
has retained its high-excitation spectrum, showing emission lines
of [Fe X], [Fe XI], and C VI.

M31N 2007-12b
     Rudy, Lynch, Prater, Mazuk, Gilbert, Puetter, and Perry report
that spectroscopy, obtained as above, of the apparent nova 2007-12b
in M31 (cf. http://www.cfa.harvard.edu/iau/CBAT_M31.html) on 2007
Dec. 15 UT shows a remarkably bright H_alpha line of very high
equivalent width.  Owing to the low signal-to-noise ratio on this
faint object, no continuum was detectable, and the only other
emission lines seen were Paschen beta, gamma, delta, and He I
1.0830-microns.  The FWHM of these lines were about 5000 km/s --
notably broad for a nova.  The FWZI of H_alpha was about 6800 km/s.

                      (C) Copyright 2007 CBAT
2008 January 1                 (8907)            Daniel W. E. Green

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