Circular No. 8420
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)
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Phone 617-495-7440/7244/7444 (for emergency use only)


SUPERNOVAE 2004fa AND 2004fb
     Further to IAUC 8407, Y.-t. Chen et al. (plus W. Hsiao) report
the discovery of two apparent supernovae on unfiltered CCD images
taken with the 1-m Lulin Observatory telescope.

SN       2004 UT        R.A.  (2000.0)  Decl.    Mag.     Offset
2004fa   Sept. 5.672  20 22 35.00  -29 49 20.7   16.8   0".2 W, 4".3 N
2004fb   Oct.  7.698  20 15 25.63  -37 30 34.6   18.3   1".7 E, 7".1 N

Additional approximate magnitudes:  SN 2004fa in MCG -05-48-5 = PGC
64555, Aug. 13.591 UT, [19.3; 30.65, 19.1; Sept. 1.536, 18.1; 2.608,
17.8.  SN 2004fb in ESO 340-G7, Sept. 1.699, [19.0; Oct. 9.675,
18.5; 10.694, 18.5.


SUPERNOVAE 2004dx, 2004eh, 2004ep, 2004eq, 2004ev, 2004ex-2004ez
     A. V. Filippenko, R. J. Foley, and R. Chornock, University of
California, Berkeley; and T. Matheson, National Optical Astronomy
Observatory, report that inspection of CCD spectra (range 320-940
nm), obtained on Oct. 18 UT with the Keck I 10-m telescope (+ LRIS),
shows that SN 2004dx (IAUC 8392) is a supernova, probably of type Ic
(with a remote chance of being of type Ib), 2-3 months past maximum
brightness.  SN 2004eh (IAUC 8401) is of type Ib, roughly a month
past maximum; the He I lines have well-developed P-Cyg profiles.  SN
2004ep (IAUC 8406) is of type II in the nebular phase, many months
past maximum.  SN 2004eq (IAUC 8407, 8411) is of type Ia, about 2
months past maximum.  SN 2004ev (IAUC 8417) is also of type Ia,
perhaps 3 weeks past maximum.  SN 2004ex (IAUC 8418) is of type II,
within a few weeks past maximum; the continuum is relatively blue,
H_alpha has a classic P-Cyg profile, and the other Balmer and Fe II
lines are strong.  The ejecta velocity measured from the H_alpha
absorption minimum is unusually large, about 14000 km/s.  SN 2004ey
(IAUC 8419) is a young, normal type-Ia supernova close to maximum
brightness.  SN 2004ez (IAUC 8419) is of type II, perhaps 1-2 months
past maximum, with prominent P-Cyg profiles of hydrogen, Fe II, and
Ca II; the ejecta velocity measured from the H_alpha absorption
minimum is about 4600 km/s.


SUPERNOVA 2004dj IN NGC 2403
     CCD R-band magnitudes by K. Hornoch, Lelekovice, Czech
Republic:  Sept. 4.976 UT, 11.71; 7.001, 11.72; 14.033, 11.86;
17.932, 11.88; 30.941, 12.23; Oct. 11.892, 12.77.

                      (C) Copyright 2004 CBAT
2004 October 18                (8420)            Daniel W. E. Green