[IAUC] CBET 3977: 20140918 : SUPERNOVA 2014df IN NGC 1448 = PSN J03442399-4440081

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                                                  Electronic Telegram No. 3977
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 2014df IN NGC 1448 = PSN J03442399-4440081
     L. A. G. Monard, Calitzdorp, Western Cape, South Africa, reports his
discovery of a supernova (magnitude 14.0) on several unfiltered CCD images
obtained on June 3.182 UT with 30- and 35-cm RCX400 telescopes at his Klein
Karoo Observatory.  The new object is located at R.A. = 3h44m23s.99, Decl. =
-44d40'08".1 (equinox 2000.0; UCAC2 catalogue), which is 86" west and 86"
south of the center of the Scd-type galaxy NGC 1448.  The variable was
designated PSN J03442399-4440081 when it was posted at the Central Bureau's
TOCP webpage and is here designated SN 2014df based on the spectroscopic
confirmation reported below.  Additional CCD magnitudes for 2014df:  June
4.801, V = 14.3 (R. Kneip, Luxembourg; using the T31 51-cm CDK telescope at
Siding Spring; image posted at URL http://astrob.in/99910/0/); 6.186, 13.9
(Monard); 6.819, 14.7 (J. Brimacombe, Cairns, Australia; remotely using a
41-cm RCOS telescope + U9000 camera + luminance filter at the Warrumbungle
Observatory, Siding Spring; position end figures 23s.99, 08".3; images posted
at URL https://www.flickr.com/photos/43846774@N02/14363935265/); 7.162, 13.9
(Monard); 11.169, 14.0 (Monard); 17.176, 14.3 (Monard); 20.186, 14.4 (Monard);
25.832, 14.5 (H. Sato, Tokyo, Japan; using a 0.43-m f/6.8 astrograph +
Luminance filter at Siding Spring; two stacked 60-s images; position end
figures 24s.00, 08".3).

     M. Childress, G. Zhou, R. Scalzo, F. Yuan, B. Zhang, A. Ruiter, I.
Seitenzahl, and B. Schmidt, Australian National University (ANU); and B.
Tucker, ANU and University of California at Berkeley, report that
spectroscopic classification of PSN J03442399-4440081 = 2014df was obtained on
June 4.82 UT via a 15-min exposure with the Wide Field Spectrograph (cf.
Dopita et al. 2007, Ap. Space Sci. 310, 255) on the ANU 2.3-m telescope at
Siding Spring using the B3000/R3000 gratings (wavelength range 350-980 nm at
0.1-nm resolution).  The spectrum indicates that 2014df is a type-Ib supernova
a few days after maximum light.  Classification with SNID (Blondin and Tonry
2007, Ap.J. 666, 1024) yields a best match to SN 2008D at phase +6 days at a
redshift of z = 0.003, consistent with the redshift of the apparent host
galaxy, NGC 1448 (z = 0.0039; Koribalski et al. 2004, A.J. 128, 16).


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                         (C) Copyright 2014 CBAT
2014 September 18                (CBET 3977)              Daniel W. E. Green