[IAUC] CBET 1559: 20081104 : SUPERNOVAE 2008gs, 2008gt, 2008gu, 2008gv, 2008gw

Mar Nov 4 03:29:19 ARST 2008

                                                  Electronic Telegram No. 1559
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS en CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
CBAT en CFA.HARVARD.EDU (science)
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SUPERNOVAE 2008gs, 2008gt, 2008gu, 2008gv, 2008gw
     Further to CBET 1552, A. J. Drake, A. Mahabal, S. G. Djorgovski, M. J.
Graham, and R. Williams, California Institute of Technology; M. Catelan,
Pontificia Universidad Catolica; E. C. Beshore, S. M. Larson, and R. Hill,
Lunar and Planetary Laboratory, University of Arizona; and E. Christensen,
Gemini Observatory, report the "Catalina Real-time Transient Survey"
discovery of several apparent supernovae in unfiltered Catalina Sky Survey
(CSS) images:

 SN       2008 UT        R.A. (2000.0) Decl.      Mag.      Offset
 2008gs   Sep. 21.41    1 27 05.78  + 3 13 05.7   17.6
 2008gt   Oct. 29.20   22 44 43.69  - 3 08 51.1   18.4    10".7 W, 6".9 N
 2008gu   Oct. 30.22    1 13 41.49  + 4 47 18.0   17.7    2".6 E, 14".8 N
 2008gv   Oct. 31.31    1 52 31.71  +33 27 52.0   19.7
 2008gw   Nov.  3.41    4 39 26.21  + 9 08 31.6   18.3    13".4 W, 10".3 N

The Palomar 1.52-m reflector (+ Gunn filters) was used for follow-up
photometry and was used for the g and r magnitudes listed below (otherwise
unfiltered CSS images were stated or presumed for other magnitudes below).
Additional magnitudes for 2008gs:  Feb. 10.10 UT, [20.0; Sept. 22.21, r =
17.8, g = 17.5; 24.21, r = 17.8, g = 17.4; Oct. 8.38, 18.1; 30.22, 18.8.
Additional magnitudes for 2008gt:  Oct. 1.26, [20.5; Nov. 1.18, r = 18.4.
Additional magnitudes for 2008gu:  Jan. 18.45, [20.0; Sept. 21.41, 18.3;
29.34, 18.0; Oct. 8.38, 17.8; Nov. 1.15, r = 17.5, g = 17.8.  Additional
magnitudes for 2008gv:  Mar. 11.11, [20.0; Sept. 24.32, 18.9; Oct. 6.44,
19.1; 25.40, 19.7; Nov. 1.22, r = 19.6, g = 19.9.  Additional magnitudes for
2008gw:  Oct. 10.50, [20.0; 24.47, 18.8.


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      superseded by text appearing later in the printed IAU Circulars.

                         (C) Copyright 2008 CBAT
2008 November 4                  (CBET 1559)              Daniel W. E. Green