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ESO 302-G27 in Horologium Dist. 200 million l.y. (?) Supernova Mag 17.8:CR Date : 30.55 Dec 2005 Exposure time : 60 sec. 0.35m f/11.4 AP-6 CCD |
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Supernova Mag 17.3CR Date : 1.53 Jan 2006 |
Electronic Telegram No. 346
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT@CFA.HARVARD.EDU (science)
URL http://cfa-www.harvard.edu/iau/cbat.html
SUPERNOVA 2005my IN ESO 302-G27
P. Luckas, Perth, W. Australia; O. Trondal, Oslo, Norway; and M.
Schwartz, Patagonia, AZ, report the discovery of an apparent supernova
on unfiltered CCD frames taken with the 0.35-m Tenagra telescope at
Perth on 2005 Dec. 30.55 (at mag 17.8) and 2006 Jan. 1.53 UT (mag
17.3) in the course of the Tenagra Observatory Supernova Search. SN
2005my is located at R.A. = 4h01m53s.13, Decl. = -41o56'08".3 (equinox
2000.0), which is 15".9 east and 23".0 north of the center of ESO
302-G27 (which itself has position end figures 51s.70, 31".3).
Nothing was visible at the position of 2005my on an image taken by
Luckas on 2005 Oct. 14.75 (limiting magnitude about 18.5).
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2006 CBAT
2006 January 1 (CBET 346) Daniel W. E. Green
Electronic Telegram No. 358
SUPERNOVA 2005my IN ESO 302-G27
M. Salvo and B. Schmidt, Australian National University (ANU);
and S. Ryder, Anglo-Australian Observatory, report that a spectrogram
(range 370-900 nm), obtained with the ANU 2.3-m telescope (+
Double-Beam Spectrograph) on Jan. 7.53 UT, shows SN 2005my (IAUC
8655) to be a type-II supernova in the late plateau phase; adopting
the NED recession velocity for the host galaxy (Mathewson and Ford
1996, Ap.J. Suppl. 107, 97) of cz = 4441 km/s, the expansion velocity
measured from the Fe II 492.4- and 501.8-nm lines is 2000 km/s.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2006 CBAT
2006 January 8 (CBET 358) Daniel W.E. Green
Australian National University