[IAUC] CBET 783: 20061223 : V2362 CYGNI

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                                                  Electronic Telegram No. 783
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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V2362 CYGNI
     J.-U. Ness and S. Starrfield, Arizona State University; G. Schwarz
and K. Vanlandingham, West Chester University; J. Osborne and K. L. Page,
University of Leicester; C. E. Woodward, University of Minnesota; M. F.
Bode, Liverpool John Moores University; J. Krautter, University of
Heidelberg; and R. J. Rudy, Aerospace Corporation, report that V2362 Cyg
was observed in x-rays via Swift on Nov. 21 with a count rate of (12 +/- 1)
x 10^(-3) counts per second.  This is a factor of 1.6 +/- 0.5 (68.3-percent
uncertainty) higher than on Oct. 14 (cf. CBET 696).  The x-ray spectrum is
significantly harder than that of a supersoft x-ray source.  Combining the
two Swift XRT observations, an x-ray luminosity of 8 x 10^(31) d^2 erg/s
(where d is the distance in kpc) is derived from a spectral fit to an
optically thin plasma model of temperature kT = 3.7(+6.6/-0.6) keV.  The
optical light curve has had a long-lasting re-brightening phase that
started in July 2006 (CBET 671).  The brightness increase in the optical
between the two Swift observations was 1 magnitude, equivalent to an
increase in flux by a factor 2.5.  V2362 Cyg has been observed a third
time in x-rays with Swift on Dec. 20 with a count rate of (2.1 +/- 0.3) x
10^(-2) counts per second.  In the optical, V2362 Cyg has rapidly declined
(CBET 775), but in x-rays this is nova is slowly becoming brighter.


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                         (C) Copyright 2006 CBAT
2006 December 23                 (CBET 783)               Daniel W. E. Green