[IAUC] CBET 2131: 20100119 : SUPERNOVAE 2009ns-2009nx AND 2010I-2010M
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Mar Ene 19 01:59:02 ART 2010
Electronic Telegram No. 2131
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
M.S. 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVAE 2009ns-2009nx AND 2010I-2010M
J. L. Prieto, Carnegie Observatories; R. Khan, Ohio State University;
A. J. Drake, S. G. Djorgovski, A. Mahabal, M. J. Graham, and R. Williams,
California Institute of Technology; M. Catelan, Pontificia Universidad
Catolica de Chile; E. C. Beshore and S. M. Larson, Lunar and Planetary
Laboratory, University of Arizona; and E. Christensen, Gemini Observatory,
report the CRTS discovery of nine confirmed supernovae and two apparent
supernovae in unfiltered images from the Catalina Sky Survey (CSS) 0.7-m
telescope and the 1.5-m Mt. Lemmon Survey (MLS) telescope, with the
discovery observations tabulated below. The spectroscopic types tabulated
below were from observations made with the Boller and Chivens CCD
Spectrograph on the 2.4-m Hiltner telescope at MDM Observatory between Jan.
8 and 15 UT; cross-correlation was made with a library of supernovae
spectra using the SuperNova IDentification code (SNID; Blondin and Tonry
2007, Ap.J. 666, 1024), and the spectra reveal the following redshifts:
2009ns z = 0.05; 2009nu, 0.04; 2009nv, 0.09; 2009nw, 0.14; 2010I, 0.06;
2010J, 0.17; 2010K, 0.02; 2010L, 0.07; 2010M, 0.06.
SN 2009 UT R.A. (2000.0) Decl. Mag. Offset Type
2009ns Oct. 15.33 2 15 37.60 - 3 25 41.0 16.9 0".5 W, 1".5 N Ia
2009nt Nov. 20.16 23 11 03.12 +20 26 19.6 19.6 0".1 E, 1".2 N
2009nu Dec. 15.14 2 20 37.69 + 2 24 14.7 18.7 6".4 E, 9".5 S II
2009nv Dec. 18.51 12 02 55.28 +15 35 02.4 19.1 8".7 W, 4".9 N Ia
2009nw Dec. 18.46 10 40 10.86 +22 37 35.5 19.4 1".8 W, 0".4 S IIn
2009nx Dec. 20.11 0 44 11.67 +23 44 25.4 19.0 0".7 W, 1".7 S
SN 2010 UT R.A. (2000.0) Decl. Mag. Offset Type
2010I Jan. 8.46 10 12 13.27 - 1 49 00.1 18.1 -- Ia
2010J Jan. 8.49 11 15 26.75 + 8 06 43.7 19.7 1".8 W, 0".4 S Ia
2010K Jan. 8.49 12 02 46.87 + 2 24 06.1 16.4 1".4 W, 3".5 N II
2010L Jan. 12.12 2 23 28.78 + 5 35 30.6 18.5 0".5 E, 2".7 N Ia
2010M Jan. 13.14 3 21 37.59 +26 36 50.3 18.8 0".6 W, 1".8 S IIn
Unfiltered follow-up CCD observations were made remotely by S. Howerton
(Arkansas City, KS, U.S.A.) using the "Light Buckets 3" (LB3) 0.3-m telescope
located at Rodeo, NM, U.S.A., and by J. Brimacombe (Cairns, Australia) using
the New Mexico Skies 0.6-m RCOS telescope. Further magnitudes for 2009ns:
2009 Sept. 16.43 UT, [18.8 (CSS); Sept. 24.46, 18.3 (CSS) Oct. 27.29, 17.4
(CSS); Nov. 17.30, 18.1 (CSS); Dec. 15.15, 18.3 (CSS). Further magnitudes for
2009nt: 2009 Sept. 28.25, [20.4 (CSS); Oct. 26.19, 19.1 (CSS); Nov. 8.18,
19.3 (CSS); 2010 Jan. 3.05, 20.3 (RCOS). Further magnitudes for 2009nu:
2009 Oct. 16.40, [20.5 (CSS); Nov. 8.34, 18.9 (CSS); Nov. 23.19, 18.8 (CSS);
2010 Jan 2.64, 19.1 (RCOS). Further magnitudes for 2009nv: 2009 Nov. 23.52,
[20.5 (CSS); 2010 Jan. 2.46, 19.0 (RCOS). Further magnitudes for 2009nw:
2009 May 7.23, [20.7 (CSS); Oct. 14.51, 20.2 (CSS); Nov. 19.47, 19.4 (CSS);
2010 Jan. 3.3, 19.5 (RCOS). Further magnitudes for 2009nx: 2009 Nov. 26.14,
[20.3 (CSS); Dec. 11.16, 20.3 (CSS); 2010 Jan. 3.1, 19.3 (RCOS). Further
magnitudes for 2010I: 2009 Dec. 16.52, [20.5 (CSS). Further magnitudes for
2010J: 2007 Oct. 30.52, [21.8 (MLS). Further magnitudes for 2010K: 2009
June 15.17, [17.5 (CSS); 2010 Jan. 10.49, 16.6 (LB3). Further magnitudes for
2010L: 2009 Nov. 23.19, [19.0 (CSS). Further magnitudes for 2010M: 2009
Nov. 22.28, [20.0 (CSS).
I. K. W. Kleiser, J. M. Silverman, S. B. Cenko, and A. V. Filippenko,
University of California, Berkeley, report that inspection of CCD spectra
(range 350-1020 nm), obtained on Jan. 16 UT with the 3-m Shane reflector (+
Kast) at Lick Observatory, shows that 2010K is a type-II supernova. The
hydrogen Balmer lines have well-developed P-Cyg profiles, although the emission
component of H-alpha greatly dominates over the absorption component.
Cross-correlation with a library of supernova spectra using the SNID code
indicates that 2010K is most similar to the type-IIP supernova 2004et at about
10 days past maximum brightness. After removal of the host-galaxy recession
velocity of about 6000 km/s, determined from narrow emission features, the
absorption minimum of the H-alpha line is found to be blueshifted by about
10200 km/s.
NOTE: These 'Central Bureau Electronic Telegrams' are sometimes
superseded by text appearing later in the printed IAU Circulars.
(C) Copyright 2010 CBAT
2010 January 19 (CBET 2131) Daniel W. E. Green
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