Electronic Telegram No. 3672
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 2013ft IN NGC 7732 = PSN J23413520+0343305
     Further to CBET 3606, K. L. Fuller, W. Zheng, W. Li, and A. V. Filippenko,
University of California at Berkeley; and S. B. Cenko, Goddard Space Flight
Center, report the LOSS discovery of an apparent supernova in NGC 7732 on
unfiltered KAIT images:

 SN       2013 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2013ft   Sep. 13.29   23 41 35.20  + 3 43 30.5   18.6    20".4 E, 0".5 N

A finding chart for the new object was posted at the following website URL:
http://astro.berkeley.edu/~zwk/findingchart/PSN_J23413520+03433047.jpg.  The
variable was designated PSN J23413520+0343305 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2013ft based on the
spectroscopic confirmation reported below.  Additional approximate CCD
magnitudes for 2013ft:  Sept. 11.3 UT, [19.0 (KAIT); 14.2, 18.6 (KAIT);
14.769, 18.0 (J. Brimacombe, Cairns, Australia; 41-cm telescope + infrared
filter; bandpass > 700 nm; bright moonlight; position end figures 35s.13,
30".1; image posted at http://www.flickr.com/photos/43846774@N02/9908663756/);
14.921, 18.4 (Gianluca Masi, Francesca Nocentini, and Patrick Schmeer;
remotely using a 43-cm robotic telescope at Ceccano, Italy; position end
figures 35s.15, 30".2); 15.2, 18.4 (KAIT); 16.4, 18.4 (KAIT); 23.674, 17.8
(Brimacombe; position end figures 35s.15, 31".2; image posted at website URL
http://www.flickr.com/photos/43846774@N02/9908663756/); 24.040, 18.8 (Federica
Luppi and Luca Buzzi, Varese, Italy; 0.36-m f/7.1 reflector; position end
figures 35s.16, 30".3; reference stars from CMC-14 catalogue; image posted at
URL http://www.astrogeo.va.it/pub/TOCP/PSN_N7732.jpg); 24.534, R = 17.7 (P.
Miller, P. Roche, A. Tripp, R. Miles, R. Holmes, S. Foglia, L. Buzzi, T.
Vorobjov, and T. Lister; 2.0-m f/10 "Faulkes Telescope North" + Bessell R-band
filter at Haleakala, HI; 120-s exposure; position end figures 35s.14, 30".2).

     M. Childress, R. Scalzo, F. Yuan, and B. Schmidt, Australian National
University (ANU); and B. Tucker, ANU and University of California at Berkeley,
report spectroscopic classification of PSN J23413520+0343305 = SN 2013ft with
the Wide Field Spectrograph (WiFeS; cf. Dopita et al. 2007, Ap. Space Sci.
310, 255) on the ANU 2.3-m telescope at Siding Spring using the B3000/R3000
gratings (wavelength range 350-980 nm at 0.1-nm resolution).  A 40-min WiFeS
spectrogram taken on Oct. 8 indicates that 2013ft is a type-IIP supernova a
few weeks after maximum light, with the spectrum showing clear H_alpha and
H_beta P-Cyg profiles.  Narrow emission from the host galaxy indicates a
redshift of 0.0096, consistent with the redshift of the putative host galaxy,
NGC 7732 (z = 0.0097; Huchra et al. 1999, Ap.J. Suppl. 121, 287).


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

                         (C) Copyright 2013 CBAT
2013 October 13                  (CBET 3672)              Daniel W. E. Green