[IAUC] CBET 3759: 20131218 : SUPERNOVA 2013hl IN NGC 3910 = PSN J11500016+2120166

Mar Dic 17 22:20:47 ART 2013

                                                  Electronic Telegram No. 3759
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 2013hl IN NGC 3910 = PSN J11500016+2120166
     Syuichi Nakano, Sumoto, Japan, reports the discovery by Koichi Itagaki
(Teppo-cho, Yamagata) of an apparent supernova (mag 16.7) on an unfiltered CCD
frame (limiting magnitude 18.5) taken on Dec. 13.856 UT using a 0.50-m f/6.8
reflector at the Takanezawa station, Tochigi-ken.  The new object is located
at R.A. = 11h50m00s.16, Decl. = +21d20'16".6 (equinox 2000.0), which is 12"
east and 15" north of the center of NGC 3910.  The discovery image was posted
at website URL http://www.k-itagaki.jp/images/3910.jpg.  The variable was
designated PSN J11500016+2120166 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2013hl based on the spectroscopic
confirmation reported below.  Additional CCD magnitudes for 2013hl:  2011 Mar.
31.554, [19.0 (Itagaki; 0.60-m f/5.7 reflector at Yamagata); 2013 Dec. 14.171,
V = 16.9 (M. Martignoni, Magnago, Italy; 0.25-m reflector; position end
figures 00s.19, 17".3; PPMXL reference stars); 14.399, 16.9 (T. Yusa, Osaki,
Japan; remotely using a 0.25-m f/3.4 hyperbolic astrograph + SBIG ST-10XME
camera at the RAS Observatory near Mayhill, NM, U.S.A.; position end figures
00s.18, 17".4; UCAC4 reference stars; limiting magnitude 17.5; image posted
at URL http://space.geocities.jp/yusastar77/supernova/PSNinN3910_131214.htm);
14.639, 16.9 (Toshihide Noguchi, Katori, Chiba-ken, Japan; 0.23-m f/6.3
Schmidt-Cassegrain reflector; limiting mag 18.0; position end figures 00s.15,
17".1; image posted at http://park8.wakwak.com/~ngc/images/PSNinNGC3910.jpg;
communicated by Nakano); 16.192, 16.6 (Federica Luppi and Luca Buzzi, Varese,
Italy; 0.60-m f/4.6 reflector; position end figures 00s.17, 17".3; image
posted at website URL http://www.astrogeo.va.it/pub/TOCP/PSN_N3910.jpg).

     E. Y. Hsiao, M. M. Phillips and N. Morrell, Las Campanas Observatory;
G. H. Marion, University of Texas, Austin; C. Contreras, C. Gall, M. D.
Stritzinger, Aarhus University; and R. P. Kirshner, Harvard-Smithsonian Center
for Astrophysics, report that a near-infrared spectrogram (range 810-2400 nm)
of PSN J11500016+2120166 = SN 2013hl was obtained on Dec. 14.36 UT with the
FoldedPort Infrared Echellette (FIRE) spectrograph on the 6.5-m Magellan Baade
Telescope.  The spectrum shows that 2013hl is a type-Ia supernova,
approximately a week past maximum light.  The near-infrared spectrum is
similar to that of SN 2000do at nine days past maximum (Marion et al. 2009,
A.J. 138, 727).  The supernova redshift approximately matches the redshift of
the presumed host galaxy (NGC 3910) at z = 0.0262 (from Rines et al. 2003,
A.J. 126, 2152; via NED).


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

                         (C) Copyright 2013 CBAT
2013 December 18                 (CBET 3759)              Daniel W. E. Green