Electronic Telegram No. 4180
Central Bureau for Astronomical Telegrams
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SUPERNOVA 2015ag IN IC 43 = PSN J00422186+2938415
     Paolo Campaner reports the discovery of an apparent supernova (mag 19.1)
on three 75-s unfiltered CCD exposures (limiting magnitude 20.0) obtained on
Aug. 6.092 UT with a 0.4-m f/5.5 reflector at Ponte di Piave, Italy, in the
course of the Italian Supernovae Search Project.  The new object is located at
R.A. = 0h42m21s.86, Decl. = +29d38'41".5 (equinox 2000.0), which is 1" west
and 12" north of the center of IC 43.  The variable was designated PSN
J00422186+2938415 when it was posted at the Central Bureau's TOCP webpage
and is here designated SN 2015ag based on the spectroscopic confirmation
reported below.  SN 1973U also appeared on IC 43 (cf. IAUC 2620).  Additional
CCD magnitudes for 2015ag:  Aug. 7.095, 19.0 (Campaner); 8.725, 20.8 (J.
Brimacombe, Cairns, Australia; position end figures 21s.96, 40".9; images
posted at URL https://www.flickr.com/photos/43846774@N02/20337212839/);
9.104, 19.2 (Campaner); 11.779, 20.4 (Brimacombe; position end figures
21s.96, 41".0); 13.094, 18.9 (G. Masi; remotely using a 43-cm telescope at
Ceccano, Italy; position end figures 21s.93, 40".7).

     G. Terreran, S. Benetti, E. Cappellaro, N. Elias-Rosa, P. Ochner, A.
Pastorello, L. Tartaglia, L. Tomasella, and M. Turatto, Osservatorio
Astronomico di Padova, Istituto Nazionale di Astrofisica, report that an
optical spectrogram (range 340-820 nm; resolution 1.4 nm) of PSN
J00422186+2938415 = SN 2015ag, obtained on Aug. 11.05 UT with the Asiago
182-cm Copernico Telescope (+ AFOSC) in the framework of the Asiago Transient
Classification Program (Tomasella et al. 2014, A.N. 335, 841), shows that
this a type-Ic supernova.  Assuming a redshift z = 0.0162 for the host
galaxy, IC 43 (Huchra at al. 1999, Ap.J. Supple. 121, 287; via NED), a good
match is found with type-Ic supernovae around two-three months post-maximum.
Classification was done with GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383)
and SNID (Blondin and Tonry 2007, Ap.J. 666, 1024).  The Asiago
classification spectra are posted at URL http://sngroup.oapd.inaf.it.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2015 CBAT
2015 November 16                 (CBET 4180)              Daniel W. E. Green