Electronic Telegram No. 4166
Central Bureau for Astronomical Telegrams
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SUPERNOVA 2014ei IN MCG -01-13-50 = PSN J05031639-0256110
     Further to CBET 3967, P. Lu, W. Zheng, and A. V. Filippenko, University
of California at Berkeley, report the LOSS discovery of a supernova in MCG
-01-13-50 on unfiltered KAIT images:

 SN       2014 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2014ei   Nov. 5.42    5 03 16.36  - 2 56 11.4   17.8    14".7 W, 0".4 N

The object was detected again on 2014 Nov. 6.4 UT at a similar mag of about
17.8.  A finding chart was posted by the discoverers at the following website
URL:  http://astro.berkeley.edu/~zwk/findingchart/PSN_J05031639-02561097.jpg.
The variable was designated PSN J05031639-0256110 when it was posted at the
Central Bureau's TOCP webpage, due to an earlier (slightly different) position
supplied by the discoverers when the posted it on the TOCP, and is here
designated SN 2014ei based on the spectroscopic confirmation reported below.
G. Masi and P. Catalano obtained exposures on 2014 Nov. 24.979 UT remotely
with a 43-cm telescope at Ceccano, Italy, showing 2014ei at mag 17.6 with
measured position end figures 16s.37, 11".4.

     T. Kangas, H. Korhonen, S. Mattila, and K. Nilsson, University of Turku;
E. Kankare, Queen's University, Belfast; V. Lindholm, University of Helsinki;
and M. Herrera-Endoqui, J. Laine, and J. D. Montonen, University of Oulu,
report the classification of PSN J05031639-0256110 = SN 2014ei in MCG
-01-13-50 based on a low-resolution spectrogram obtained on 2014 Nov. 10.1 UT
with the Nordic Optical Telescope (+ ALFOSC; range 320-910 nm).  Cross-
correlation with a library of supernova spectra using SNID (Blondin and Tonry
2007, Ap.J. 666, 1024) and GELATO (Harutyunyan et al. 2008, A.Ap. 488, 383)
provide best matches with type-Ib supernovae around maximum light.

     W. Zheng, B. E. Tucker, K. I. Clubb, and A. V. Filippenko, University of
California, Berkeley, report that a CCD spectrogram (range 350-1000 nm) of
PSN J05031639-0256110 = SN 2014ei was obtained on 2014 Nov. 25.393 UT with
the Shane 3-m reflector (+ Kast spectrograph) at Lick Observatory.  The
spectrum shows that 2014ei is a type-Ib supernova. Cross-correlation with a
library of supernova spectra using the "SuperNova Identification" code (SNID;
Blondin and Tonry 2007, Ap.J. 666, 1024) indicates a similarity with several
normal type-Ib supernovae about 10 days after maximum brightness.  The
redshift estimated from the host-galaxy narrow H-alpha emission line is z =
0.015, in good agreement with the value given in SIMBAD for MCG -01-13-50.


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

                         (C) Copyright 2015 CBAT
2015 November 15                 (CBET 4166)              Daniel W. E. Green