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IAUC 7438: 2000cm; 1998fe; 2000cj

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IAUC number

                                                  Circular No. 7438
Central Bureau for Astronomical Telegrams
Mailstop 18, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions)
URL http://cfa-www.harvard.edu/iau/cbat.html  ISSN 0081-0304
Phone 617-495-7244/7440/7444 (for emergency use only)

     S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian
Center for Astrophysics, report that an image taken by A. Mossman
on June 5.15 UT with the F. L. Whipple Observatory 1.2-m telescope
(+ 4shooter) yields the following precise position for SN 2000cm
(cf. IAUC 7436, 7437), R.A. = 12h12m59s.43, Decl. = +7 18'00".6
(equinox 2000.0, uncertainty +/- 0".3).  H. Yamaoka, Kyushu
University, reports the following position end figures, measured
from an unfiltered CCD image taken on June 4 UT by F. M. Ewalt
(East Killingly, CT) with a 0.25-m telescope:  59s.43, 00".8.
     M. Turatto, A. Pastorello, E. Cappellaro, and F. Cedrati,
Osservatorio Astronomico di Padova, write:  "We obtained spectra
(range 350-750 nm, resolution 2 nm) on June 4.9 UT with the Asiago
1.82-m telescope (+ AFOSC), showing SN 2000cm to be a type-Ia
supernova about 2 weeks after maximum.  The strongest features were
emissions measured at 464, 539, and 592 nm.  Based on comparison
with spectra of other type-Ia events, we estimate the redshift of
the parent galaxy to be about 2500 km/s.  The typical absorption of
Si II is still visible and measured at 618 nm, corresponding to an
expansion velocity of about 10 000 km/s."

     W. D. Li, University of California at Berkeley, reports the
discovery with the 0.8-m Katzman Automatic Imaging Telescope of an
apparent supernova in Lick Observatory Supernova Search (cf. IAUC
6627, 7126) archive images of NGC 6027D, which is one of the
'Seyfert Sextet' galaxies.  SN 1998fe was present on unfiltered
images taken on July 19.3, 21.3, 23.3, and 26.3 UT, all with mag
about 18.0, and it was located at R.A. = 15h59m12s.84, Decl. =
+20o45'39".0 (equinox 2000.0), which is 0".7 west and 2".4 north of
the nucleus of NGC 6027D.  SN 1998fe is not visible in subsequent
images of the field taken in 1999 and 2000 (most of which have
limiting mag about 19.0).

SUPERNOVA 2000cj IN NGC 6753
     R. H. McNaught, Australian National University, reports an
improved position for SN 2000cj (cf. IAUC 7425) from four CCD
images taken with the Siding Spring 1.0-m telescope on June 12.64
UT (using 139 USNO CCD Astrograph Catalog stars, rms 0".14 in R.A.
and 0".15 in Decl.):  R.A. = 19h11m27s.658, Decl. = -57o03'19".41
(equinox J2000.0), which is 33".2 east and 21".8 south of the
center of NGC 6753.  The magnitude was R about 15.7.

                      (C) Copyright 2000 CBAT
2000 June 13                   (7438)            Daniel W. E. Green

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