Electronic Telegram No. 2831
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@eps.harvard.edu (alternate cbat@iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2011fy = PSN J18395393+4001437
     Ron Arbour, South Wonston, Hants, UK, reports the discovery of an
apparent supernova (mag 17.6) on an unfiltered CCD image taken on Sept. 17.962
UT using a 35-cm f/6 Schmidt-Cassegrain telescope (+ SXVF H9 camera) in the
course of his supernova patrol.  The new object is located at R.A. =
18h39m53s.93, Decl. = +40d01'43".7 (equinox 2000.0), which is 6" west of the
presumed host galaxy.  Nothing is visible at this position on Digitized Sky
Survey plates from 1989 July 2 (blue; no limiting magnitude provided) and
1993 May 30 (red).  The variable was designated PSN J18395393+4001437 when it
was posted on the Central Bureau's TOCP webpage and is here designated SN
2011fy based on the spectroscopic report below.  Additional unfiltered CCD
magnitudes for 2011fy:  Sept. 18.838, 17.6 (Arbour; position end figures
53s.91, 43".7); 18.990, 18 (David Briggs, Portsmouth, England; 60-cm Newtonian
reflector; position end figures 53s.93, 45"); 19.219, 17.9 (Joseph Brimacombe,
Cairns, Australia; position end figures 53s.88, 44".1); 21.871, 18.0 (Arbour;
position end figures 53s.93, 44".7; limiting mag 20.4); 23.898, 17.9 (Arbour;
position end figures 53s.94, 44".7).  Arbour has posted an image at website
URL http://www.rochesterastronomy.org/sn2011/p2159464s1.jpg.

     S. Valenti, S. Benetti, L. Tomasella, and P. Ochner, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica; and A. Pastorello,
Dipartimento di Astronomia, Universita di Padova, on behalf of a larger
collaboration, report that a spectrogram (range 360-810 nm; resolution 2.2 nm)
of PSN J18395393+4001437 = SN 2011fy, obtained on Sept. 24.81 UT with the
Ekar-Copernico 1.82-m telescope (+ AFOSC), shows it to be a young type-IIP
supernova, a few days after explosion.  The spectrum shows a blue continuum
with superimposed prominent P-Cyg H lines, and weak He I 587.6-nm and Fe II
features.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 September 28                (CBET 2831)              Daniel W. E. Green