Central Bureau for Astronomical Telegrams
IAUC 7532: 2000ev; 2000ew; 2000er; 2000ej
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Circular No. 7532
Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
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SUPERNOVA 2000ev IN UGC 3500
T. Matheson, S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that an image obtained on Nov. 28.35 UT by
P. Groot with the F. L. Whipple Observatory 1.2-m telescope (+ 4-Shooter)
yields the following precise position for the supernova 2000ev: R.A. =
6h47m52.0s, Decl. = +84o10'02".2 (equinox 2000.0; uncertainty 0".3). The
supernova is 4".6 west and 19".4 north of the nucleus of UGC 3500.
Corrigendum. On IAUC 7529, line 3, for Soffrago read Sozzago.
SUPERNOVA 2000ew IN NGC 3810
M. Dennefeld and J. Patris, Institut d'Astrophysique, Paris, observed
SN 2000ew with the European Southern Observatory 3.6-m telescope and EFOSC2
(range 370-930 nm, resolution 1.8 nm) on Nov. 30.35 UT. The presence of
a moderate Si II absorption, a strong 790-nm absorption and well-developed
Fe II lines indicates that this is a type Ia supernova about two weeks past
maximum.
SUPERNOVA 2000er IN PGC 9132
Dennefeld and Patris also followed the peculiar supernova 2000er with
the same instrument during Nov. 26-30. The R magnitude faded steadily by
about 0.1 mag per day, but only small changes were noticed in the spectrum
since the summary by A. Maury on IAUC 7528 (of observations on Nov. 25.2 UT).
A small absorption at 451 nm (rest wavelength) has disappeared, while broad
emission features at 638, 658 and 708 nm have developed. The broad
asymmetric emission around 589 nm is also strengthening, with its sharp
blue-edge absorption (at 586 nm) not seen on any other line. It should be
noted that the parent galaxy shows a strong dust lane.
Corrigendum. On IAUC 7528, line 4, for 44" east read 27" east.
SUPERNOVA 2000ej IN IC 1371
A. V. Filippenko and R. Chornock, University of California, Berkeley,
report that inspection of noisy CCD spectra (range 330-1000 nm) of
SN 2000ej (IAUC 7517) obtained on Nov. 29 with the Shane 3-m
reflector at Lick Observatory reveals that the object is a supernova,
probably of type Ia. The spectrum most closely resembles those of
subluminous members of the class, like SN 1991bg and SN 1998de,
perhaps 1-2 months past maximum brightness. It should be noted that the host
galaxy has a Hubble type of S0, consistent with preponderance of
early-type hosts among other subluminous type Ia supernovae.
(C) Copyright 2000 CBAT
2000 November 30 (7532) Brian G. Marsden
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