[IAUC] CBET 2767: 20110717 : SUPERNOVA 2011ed = PSN J19153440-5437400 AND SUPERNOVA 2010kx

[quai en eps.harvard.edu]

                                                  Electronic Telegram No. 2767
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 2011ed = PSN J19153440-5437400 AND SUPERNOVA 2010kx
     Ralph Martin, Perth Observatory, reports the discovery of an apparent
supernova (mag 15.5) in red-filtered CCD images (limiting magnitude 18.5) taken
on Mar. 26.780 UT and confirmed on Mar. 30.833 with the 0.6-m Perth/Lowell
Automated Telescope.  He initially reported the the new object to be located at
R.A. = 19h15m34s.4, Decl. = -54d37m40s (equinox 2000.0), which is 1".9 east and
3".6 south of the center of IC 4839; as a result, the variable was designated
PSN J19153440-5437400 when it was posted on the Central Bureau's TOCP webpage
and is here designated SN 2011ed based on the spectroscopic report below.
Martin later remeasured the position of 2011ed as R.A. =  19h15m34s.34, Decl. =
-54d37'39".5.  Additional unfiltered CCD magnitudes for 2011ed:  Mar. 10.833,
[18.5 (Martin); Apr. 3.150, 14.8 (L. A. G. Monard, Calitzdorp, Western Cape,
South Africa; position end figures 34s.35, 39".6; offset 1".3 east, 1".2 south);
6.664, 15.0 (Joseph Brimacombe, Cairns, Australia; remotely using a 41-cm
RCOS telescope + U9000 camera at Macedon Ranges Observatory, near Melbourne,
Victoria; position end figures 34s.42, 39".2).  Brimacombe's image is posted at
website URL http://www.flickr.com/photos/43846774@N02/5596935499/.

     N. Morrell, Las Campanas Observatory; G. Pignata, Universidad Andres
Bello; and J. Anderson, Universidad de Chile, on behalf of the Millennium
Center for Supernova Science, report on optical spectroscopy (range 363-918
nm) of PSN J19153440-5437400 = SN 2011ed obtained by P. Lira and P. Lopez
(Universidad de Chile) on July 1.27 UT with the Las Campanas du Pont telescope
(+ WFCCD).  Inspection of the data shows that this event is an evolved,
considerably reddened, type-Ia supernova; roughly at 3 months past maximum
brightness.
     Morrell et al. add that they obtained a spectrum (range 355-890 nm) of
2010kx (cf. CBET 2599) on July 7.42 UT with the SOAR telescope (+ Goodman HTS)
which reveals that this is a type II-P supernova several months after
explosion.  Very strong H_alpha emission dominates the spectrum of 2010kx.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2011 CBAT
2011 July 17                     (CBET 2767)              Daniel W. E. Green