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IAUC 8364: 2004cy; 2004cv; 2004cx

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                                                  Circular No. 8364
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 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  ISSN 0081-0304
Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVA 2004cy IN ESO 403-G9
     Y. Chen, Z. Lin, K. Huang, H. Lin, and W. Ip, Institute of
Astronomy, National Central University, Tawain; and Y. Qiu and J.
Hu, National Astronomical Observatories of China, report the
discovery of an apparent supernova (mag about 15.6) on unfiltered
CCD images taken on Apr. 5.87 UT with the 1-m Lulin Observatory
telescope.  SN 2004cy is located at R.A. = 21h34m25s.67, Decl. =
-33o23'13".7 (equinox 2000.0), which is 25".7 west and 6".1 south
of the center of ESO 403-G9.  Approximate unfiltered magnitudes for
the new object:  2003 Oct. 31, [19.0; 2004 Apr. 25.83, 17.5; May
27.77, 17.8; 28.77, 17.9; June 9.80, 18.2; 25.77, 18.2; 26.77,
18.4; 27.74, 18.3.


SUPERNOVA 2004cv IN MCG +03-41-120
     G. Schwarz and A. Karam, Steward Observatory (SO); R. M.
Wagner, LBT Observatory; and J. G. Rohrbach and S. Starrfield,
Arizona State University, report that a spectrum (range 420-740 nm;
resolution 0.65 nm) of SN 2004cv (cf. IAUC 8362), obtained on June
26.22 UT with the SO 2.3-m Bok telescope (+ Boller & Chivens
spectrograph), shows it to be type-Ia supernova near maximum light.
Adopting the NASA/IPAC Extragalactic Database (NED) recession
velocity of 11018 km/s, the supernova expansion velocity is 13700
km/s for the Si II feature (rest 635.5 nm).
     C. L. Gerardy, University of Texas at Austin, reports that a
low-resolution optical spectrogram (resolution 300; range 500-1000
nm) of SN 2004cv, obtained on June 29.28 UT with the 9.2-m
Hobby/Eberly Telescope (+ Marcario Low-Resolution Spectrograph) by
B. Roman and F. Deglman, indicates it to be a type-Ia supernova
near or slightly before maximum light.  Adopting the redshift of
MCG +03-41-120 (11018 km/s) from the NED, the expansion velocity of
the Si II feature (rest wavelength 635.5 nm) is 12500 km/s.


SUPERNOVA 2004cx IN NGC 7755
     M. Salvo and B. Schmidt, Australian National University (ANU);
and G. Altavilla, University of Barcelona, on behalf of the ERTN
(cf. IAUC 7961), report that inspection of a poor-S/N spectrum
(range 590-680 nm; resolution 6000) of SN 2004cx (cf. IAUC 8362),
taken by L. Kiss and S. Meszaros (University of Sydney) with the
ANU 2.3-m telescope (+ Double Beam Spectrograph) at Siding Spring
on June 30.80 UT, shows the profile of a young type-II supernova.
The expansion velocity, measured from the minimum of the P-Cyg
profile of the H_alpha line, is around 5000 km/s.

                      (C) Copyright 2004 CBAT
2004 July 1                    (8364)            Daniel W. E. Green

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