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Circular No. 7514 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) COMETS C/2000 U1, C/2000 U2, C/2000 U3, C/2000 U4 (SOHO) Further to IAUC 7508, D. Biesecker and D. Hammer report the discoveries of four additional Kreutz sungrazing comets. All four were visible in the LASCO C2 coronagraph, and C/2000 U2 and C/2000 U3 were also seen in C3 images. C/2000 U1 and C/2000 U4 were found by M. Oates; C/2000 U2 was found by M. Boschat; and C/2000 U3 was found by J. Danaher. C/2000 U1 was described as faint, with no tail evident. C/2000 U2 was fairly bright, with a long, thin tail. The measurements were made by Hammer, and the reduced positions and orbits by B. G. Marsden are given on MPEC 2000-U38. C/2000 U1 Oct. 21.393 13 37.0 -11 40 C/2000 U2 22.279 13 28.6 -13 13 C/2000 U3 24.029 13 41.4 -14 06 C/2000 U4 25.076 13 52.6 -13 09 SUPERNOVA 2000dx IN UGC 1775 M. Schwartz, Cottage Grove, OR; and W. D. Li, A. V. Filippenko, M. Modjaz, and R. R. Treffers, University of California at Berkeley, report the discovery of a supernova during a collaboration of the Lick Observatory Supernova Search (cf. IAUC 6627, 7126) using the 0.8-m Katzman Automatic Imaging Telescope (KAIT) and the Tenagra Observatory Supernova Search using the 0.8-m Tenagra II and 0.5-m Tenagra III automated telescopes (hereafter the Lick Observatory and Tenagra Observatory Supernova Searches, or LOTOSS). SN 2000dx was discovered and confirmed with the 0.5-m Tenagra III telescope on unfiltered images taken on Oct. 30.3 (mag about 17.3) and 31.2 UT (mag about 17.1). The new object was also confirmed on an unfiltered KAIT image taken on Oct. 31.3 (mag about 17.1). SN 2000dx is located at R.A. = 2h18m26s.88, Decl. = +5o39'02".0 (equinox 2000.0), which is 7".9 east and 12".3 south of the nucleus of UGC 1775. A KAIT image taken on Oct. 22.3 showed nothing at the position of SN 2000dx (limiting magnitude about 18.5). Filippenko and Li add that inspection of CCD spectra (range 330-1000 nm) obtained on Nov. 1 with the Shane 3-m reflector at Lick Observatory reveals that SN 2000dx is of type Ia, probably a few days before maximum brightness. (C) Copyright 2000 CBAT 2000 November 1 (7514) Daniel W. E. Green
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