[IAUC] CBET 2139: 20100122 : NOVA OPHIUCHI 2010

[IAUC mailing list]

                                                  Electronic Telegram No. 2139
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
URL http://www.cfa.harvard.edu/iau/cbat.html


NOVA OPHIUCHI 2010
     Hiroyuki Maehara, Kwasan Observatory, Kyoto University, reports that
a low-resolution spectrum (range 400-800 nm) of this object (cf. CBET 2128)
was obtained on Jan. 22.890 UT with the 25-cm telescope at the Kwasan
Observatory.  The spectrum shows H_alpha and Fe II emission lines and
suggests that this object is a classical nova just after maximum.  Maehara
also writes that CCD images of the nova obtained with a 25-cm telescope at
the Kwasan Observatory yield the following magnitudes:  Jan. 16.875,
I_c = 7.92; 16.875, R_c = 8.37; 16.876, V = 8.77; 16.877, B = 9.54.
     Further to CBET 2128, S. Nakano reports that H. Nishimura measured
mag 8.0 for the nova on Jan. 16.86 UT.  Nakano adds that K. Kadota
subsequently measured a star on a U.K. Schmidt Telescope plate (via the
Digitized Sky Survey) taken on 1997 Mar. 31 to have red mag 16.7 and
to be located at R.A. = 17h39m40s.96, Decl. = -21d39'45".4 (equinox 2000.0).
     W. Vollmann, Vienna, Austria, reports the following green-filtered
CCD magnitudes (approximately visual) measured from images taken by
Hermann Koberger (Vilaflor, Tenerife, Spain):  Jan. 18.299 UT, 8.4;
20.289, 9.0; 21.273, 9.3; 22.250, 9.5.
     U. Munari, Istituto Nazionale di Astrofisica, Padova Astronomical
Observatory; and S. Dallaporta, Asiago Novae and Symbiotic Stars (ANS)
collaboration, report photometry for this nova:  Jan. 19.23 UT, V
= 9.24, B-V = +0.85; 20.23, V = 9.15, B-V = +0.86; 22.22, V = 9.51, B-V
= +0.74.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2010 CBAT
2010 January 22                  (CBET 2139)              Daniel W. E. Green