Electronic Telegram No. 2145
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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CBAT@CFA.HARVARD.EDU (science)
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SUPERNOVA 2010P IN ARP 299
     S. Mattila, Tuorla Observatory; and E. Kankare, Nordic Optical Telescope,
report the discovery on near-infrared images of a second apparent supernova
(cf. CBET 2144), designated 2010P, in the luminous infrared galaxy Arp 299 (=
NGC 3690 + IC 694).  The new object was detected via image-subtraction
techniques in near-infrared images obtained using NOTCAM on Jan. 18.2 and 23.1
UT, and in an I-band image obtained using STANCAM on Jan. 23.1 on the Nordic
Optical Telescope.  SN 2010P is located at R.A = 11h28m31s.38, Decl. =
+58o33'49".3 (equinox 2000.0), which is 6".2 east and 0".3 north of the K-band
nucleus 'C' of Arp 299.  Nothing is visible at this position on NOTCAM
K_s-band images taken on 2009 Nov. 27.2 (limiting mag 17.5).  Approximate
magnitudes for 2010P:  2010 Jan. 18.2, J = 17.3, H = 16.7, K_s = 16.1; 2010
Jan. 23.1, I = 18.3, J = 16.8, H = 16.2, K_s = 15.9.  The light curve,
absolute magnitude, and colors of 2010P are consistent with a core-collapse
supernova (Mattila and Meikle 2001, MNRAS 324, 325) with a likely extinction
of about five magnitudes in V.  Infrared and radio follow-up observations of
2010P are encouraged.


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                         (C) Copyright 2010 CBAT
2010 January 25                  (CBET 2145)              Daniel W. E. Green