[IAUC] CBET 3910: 20140621 : SUPERNOVA 2014bu IN NGC 694 = PSN J01505845+2159598

Vie Jun 20 19:54:21 ART 2014

                                                  Electronic Telegram No. 3910
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 en eps.harvard.edu (alternate cbat en iau.org)
URL http://www.cbat.eps.harvard.edu/index.html
Prepared using the Tamkin Foundation Computer Network


SUPERNOVA 2014bu IN NGC 694 = PSN J01505845+2159598
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of an apparent supernova (mag 15.5) on several unfiltered CCD images
taken on June 17.191 UT at his Klein Karoo Observatory with a 30-cm RCX400
telescope (+ SBIG ST8-XME camera).  The new object is located at R.A. =
1h20m58s.45, Decl. = +21d59'59".8 (equinox 2000.0), which is 10" north of the
center of the lenticular galaxy NGC 694.  Nothing is visible on early images
taken by Monard (no limiting-magnitude or date information provided).  The
variable was designated PSN J01505845+2159598 when it was posted at the
Central Bureau's TOCP webpage and is here designated SN 2014bu based on the
spectroscopic confirmation reported below.  Additional CCD magnitudes for
2014bu:  June 18.185, 15.6 (Monard); 20.175, 15.4 (Monard); 21.059, 15.4 (G.
Masi; remotely using a 43-cm telescope at Ceccano, Italy; position end
figures 58s.45, 59".0.  E. Conseil reports that he has posted an image of
2014bu, taken on June 20.200 with the 0.35-m f/11 Schmidt-Cassegrain Slooh
Space robotic telescope T2 at Mt. Teide (Canary Islands), at the following
website URL:  https://www.flickr.com/photos/econseil/14460710281/.

     D. C. Leonard, San Diego State University; K. Follette, P. Sheehan, and
D. McCarthy, University of Arizona; S. Hart, Carnegie Mellon University; J.
Moustakas, Siena College; and A. Beverage, C. Burns, W. Chavez, A. Fox, E.
Glad, M. Gregg, Z. Griffin, J. Griggs, K. Hart, A. Holt, E. Hooper, A.
Horning, L. Hou, N. Irvin, J. Keane, S. Kinman, T. Lee, C. Lewis, C. Lindsay,
S. Lipstone, C. Martino, T. McMaken, B. Nelson, L. Neumann, S. Pirkl, S.
Pruitt, A. Schlingman, W. Schlingman, W. M. Schlingman, E. Schwartzman, N.
Stock, J. Tinker, K. Van Artsdalen, T. Waddell, L. Westerlund, J. Wilke, and
L. Wiser, 2014 Advanced Teen Astronomy Camp, report that inspection of a
low-dispersion optical spectrum (range 370-680 nm) of PSN J01505845+2159598 =
SN 2014bu, obtained with the 2.3-m Bok telescope (+ Boller & Chivens
spectrograph) at Steward Observatory on June 20 UT, shows it to be a type-II
supernova, exhibiting well-developed P-Cyg lines typical of the class during
the photospheric phase.  Cross-correlation with a library of supernova spectra
using the "Supernova Identification" code (SNID; Blondin and Tonry 2007, Ap.J.
666, 1024) finds best matches with a number of normal type-IIP supernovae
somewhat older than a month after maximum light.  Adopting for the host galaxy
(NGC 694) a radial velocity of 2950 km/s (de Vaucouleurs et al. 1991, RC3.9;
via NED), an expansion velocity of 6000 km/s is derived from the position of
the H_beta (rest 486.1 nm) minimum.


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

                         (C) Copyright 2014 CBAT
2014 June 21                     (CBET 3910)              Daniel W. E. Green