[IAUC] CBET 3072: 20120328 : NOVA OPHIUCHI 2012 = PNV J17260708-2551454

Mar Mar 27 22:12:46 ART 2012

                                                  Electronic Telegram No. 3072
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
CBAT Director:  Daniel W. E. Green; Hoffman Lab 209; Harvard University;
 20 Oxford St.; Cambridge, MA  02138; U.S.A.
e-mail:  cbatiau en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


NOVA OPHIUCHI 2012 = PNV J17260708-2551454
     Syuichi Nakano, Sumoto, Japan, reports the discovery by Hideo Nishimura
(Miyawaki, Kakegawa, Shizuoka-ken) of a possible nova (mag 12.1) on three 13-s
frames (limiting mag 13.5) taken on Mar. 25.789 UT with a Canon 200-mm f/3.2
lens and a Canon EOS 5D Digital Camera mounted on a Takahashi EM100 equatorial
telescope at Gomyo, Kakegawa, Japan.  Nishimura notes that nothing is visible
at this position on Digitized Sky Survey images or in the 2MASS catalogue.
The variable was designated PNV J17260708-2551454 when it was posted at the
Central Bureau's TOCP webpage.  Additional positions and magnitudes for the
variable (Nakano adds that H. Kaneda, Sapporo, Japan, measured position end
figures 07s.10, 46".1 from Nishimura's discovery frames):

 2012 UT            R.A. (2000.0) Decl.         Mag.    Observer(s)
 Mar. 20.784                                   [13.0    Kojima
      24.785                                    12.2    Kojima
      25.758                                    12.2    Kojima
      25.789     17h26m07s.08  -25d51'45".4     12.1    Nishimura
      26.752                                    12.7    Takao
      26.796                                    12.6    Nishimura
      27.421     17 26 07.02   -25 51 42.6      12.37V  Kiyota
      27.459     17 26 07.02   -25 51 42.5      12.6    Yusa
      27.5       17 26 07.02   -25 51 42.1      10.9    Guido et al.

Additional observers in the above table:
T. Kojima (Gunma-ken, Japan).  Canon EOS 40D camera + 150-mm f/2.8 lens.
Akira Takao (Kitakyushu, Japan).  100-mm camera lens + STL-6303E camera.
  Limiting mag about 13.0.
Seiichiro Kiyota (Tsukuba, Japan).  Remotely with 25-cm reflector + ST-10XME
  camera (iTelescopr.NET T-4) at Mayhill, NM, U.S.A.  Also magnitudes B =
  13.27, R_c = 11.88, I_c = 11.11; image posted at website URL
  http://meineko.sakura.ne.jp/ccd/PNV_J17260708-2551454-120327.jpg.
T. Yusa (Osaki, Japan).  Remotely using a 0.25-m f/3.4 hyperbolic astrograph
  + SBIG ST-10XME camera at the RAS Observatory near Mayhill, NM, U.S.A.;
  USNO-B1.0 reference stars.  Co-added 60-s exposures (limiting mag 18.5);
  image at http://space.geocities.jp/yusastar77/supernova/PNinOph_120327.htm.
Ernesto Guido, Giovanni Sostero, and Nick Howes.  Remotely with a
  0.10-m f/5 reflector near Mayhill, NM, U.S.A.  Reference stars from
  USNO-B1.0 catalogue.  An animation showing a comparison between their image
  and a red Digitized Sky Survey plate from 1997 is shown at website URL
  http://bit.ly/GUTN2i; the confirmation image is at URL http://bit.ly/HcAy0f.

     Akira Arai and Mizuki Isogai, Koyama Astronomical Observatory (KAO),
Kyoto Sangyo University, report that they obtained low-resolution (R about
550) spectrograms of PNV J17260708-2551454 with the 1.3-m Araki telescope at
KAO on Mar. 27.74 UT.  The spectra show prominent emission in H_alpha with
P-Cyg profiles on a highly reddened continuum.  H_beta, Fe II, and O I
777.4-nm are also visible.  The FWHM of the H_alpha emission is about 600
km/s.  These features suggest that the object is an "Fe II-type" classical
nova.  The spectra are posted at the following website URL:
http://www.cc.kyoto-su.ac.jp/~kao/blog/index.php/view/165.

     Kazuyoshi Imamura, Okayama University of Science (OUS), reports that a
low-dispersion spectrum (R about 400) of PNV J17260708-2551454 was obtained
on Mar. 27.836 UT using the 0.28-m Schmidt-Cassegrain telescope (+ DSS-7
spectrometer) at the OUS observatory, suggesting that the variable is a
classical nova.  An H-alpha emission line can be seen in the spectrum (FWHM
< 800 km/s).  The spectrum is posted at the following website URL:
http://blog-imgs-32-origin.fc2.com/t/n/b/tnblab/pnv_inOph_20120327.png.


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

                         (C) Copyright 2012 CBAT
2012 March 28                    (CBET 3072)              Daniel W. E. Green