Electronic Telegram No. 4165
Central Bureau for Astronomical Telegrams
Mailing address:  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 2014eh IN NGC 6907 = PSN J20250386-2449133
     Further to CBET 3967, S. Kumar, H. Yuk, W. Zheng, and A. V. Filippenko,
University of California at Berkeley, report the LOSS discovery of a
supernova in NGC 6907 on unfiltered KAIT images:

 SN       2014 UT       R.A. (2000.0) Decl.      Mag.      Offset
 2014eh   Nov. 3.09   20 25 03.86  -24 49 13.3   16.0    38".0 W, 39".8 S

The variable was found on a KAIT exposure from 2014 Oct. 29.13 UT at mag
about 17.8, but it was invisible on an image taken one night earlier on Oct.
28.10 (limiting mag about 18.2).  A finding chart was posted at website URL
http://astro.berkeley.edu/~zwk/findingchart/PSN_J20250386-24491326.jpg.  The
variable was designated PSN J20250386-2449133 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014eh based on the
spectroscopic confirmation reported below.  SNe 1984V (cf. IAUC 3951), 2004bv
(IAUC 8344), and 2008fq (CBET 1507) also appeared in NGC 6907.

     J.-J. Zhang, Yunnan Astronimical Observatory (YNAO); and X.-F. Wang,
Tsinghua University, report on an optical spectrogram (range 360-890 nm)
of PSN J20250386-2449133 = SN 2014eh thta was obtained on 2014 Nov. 5.5 UT
with the 2.4-m telescope (+ YFOSC) at the LiJiang Gaomeigu Station of YNAO.
The spectrum is consistent with a classification of a type-Ic supernova at
a young phase.  Cross-correlation with a library of supernova spectra using
the comparison tool "Gelato" (Harutyunyan et al. 2008, A.Ap. 488, 383) shows
that the spectrum of 2014eh has a good match with that of SN 2007gr at -11
days.  After removing a recession velocity of 3182 km/s for the host galaxy,
NGC 6907 (Scarano et al. 2008, MNRAS 386, 963), they measure a velocity of
the Si II 635.5-nm absorption to be about 10700 km/s.

     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 J20250386-2449133 = SN 2014eh was obtained on Nov. 25.088 UT with
the Shane 3-m reflector (+ Kast spectrograph) at Lick Observatory.  The
spectrum shows that 2014eh is a type-Ic supernova at the redshift (z =
0.010) of the host galaxy, NGC 6907.  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-Ic supernovae about 3 weeks after maximum brightness.


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 4165)              Daniel W. E. Green