[IAUC] CBET 2057: 20091129 : NOVA IN M31: M31N 2009-11c

[IAUC mailing list]

                                                  Electronic Telegram No. 2057
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 IN M31:  M31N 2009-11c
     Independent discoveries of an apparent nova in M31 were received from two
groups.  P. Podigachoski, W. Pietsch, M. Henze, and V. Burwitz, Max-Planck-
Institut fuer Extraterrestrische Physik; A. Updike, Clemson University (CU);
P. Milne and G. Williams, University of Arizona; and D. H. Hartmann, CU, found
M31N 2009-11c on two sets of twelve 60-s stacked R-band CCD images obtained
with the robotic 60-cm telescope (+ E2V CCD camera) of the Livermore Optical
Transient Imaging System (Super-LOTIS, located at Steward Observatory, Kitt
Peak).  The new object, which was first detected on Nov. 6.26 (mag 19.3) and
8.26 UT (magnitude 18.5) is located at R.A. = 0h43m10s.48 +/- 0s.01, Decl. =
+41o12'18".4 +/- 0".1 (equinox 2000.0; stated uncertainty 0".4), which is 295"
east and 231" south of the center of M31.  No object is visible at this
position on a Super-LOTIS image from Nov. 4.26 UT (limiting R magnitude 19.0).
The magnitudes were obtained from a photometric solution using R magnitudes of
the Local Group Survey M31 catalogue (Massey et al. 2006, A.J. 131, 2478).
A magnitude of R = 18.1 was measured for Nov. 9.267.
     An independent discovery was reported by by Kamil Hornoch (Ondrejov
Observatory) on a co-added 1350-sec R-band CCD frame taken by M. Wolf and
himself with the 0.65-m telescope at Ondrejov on Nov. 5.859 UT.  Available
R-band magnitudes measured by Hornoch for M31N 2009-11c:  2009 Oct. 31.132,
[21.4 (from a co-added 450-sec R-band CCD frame taken during software tests by
P. Kubanek, J. Gorrosabel, and M. Jelinek with the 1.23-m telescope at Calar
Alto); Nov. 4.963 UT, [20.3 (image by K. Hornoch, 0.65-m telescope at Ondrejov);
5.859, 19.9 +/- 0.3 (Hornoch and M. Wolf).  Position end figures measured by
Hornoch for 2009-11c:  10s.42, 18".8 (offset 294" east, 230" south).
     Hornoch and O. Pejcha, Department of Astronomy, Ohio State University,
report low-resolution optical spectroscopy (range 380-720 nm, resolution 0.7
nm) and optical photometry of M31N 2009-11c.  Spectra were obtained using the
Boller & Chivens CCD Spectrograph on the 2.4-m Hiltner telescope at MDM
Observatory.  Magnitude measurements were obtained from images taken with
RETROCAM on the 2.4-m Hiltner telescope and with the 0.65-m telescope (+
G2CCD-3200) at Ondrejov.  A spectrogram of M31N 2009-11c, taken by Pejcha on
Nov. 21.27 UT (15.4 days after its first optical detection made by Hornoch)
shows Fe II and Balmer emission lines with HWZI of about 1500 km/s,
suggesting that it is a "Fe II"-class nova close to maximum.  The following
additional R-band magnitudes were obtained:  Nov. 13.036, 17.03 +/- 0.10
(Hornoch); 18.924, 17.8 +/- 0.15 (Hornoch and P. Zasche); 21.816, 17.9 +/- 0.1
(Hornoch and P. Kusnirak); 23.042, 17.9 +/- 0.1 (Hornoch).  Sloan magnitudes
for 2009-11c by Pejcha and Hornoch (2.4-m telescope):  Nov. 21.256, g' = 18.86
+/- 0.08; 21.259, r' = 18.32 +/- 0.05.


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

                         (C) Copyright 2009 CBAT
2009 November 29                 (CBET 2057)              Daniel W. E. Green