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Circular No. 8329 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) SUPERNOVAE 2004bj AND 2004bk Further to IAUC 8321, H. Pugh and W. Li report the LOSS discovery of two apparent supernovae on unfiltered KAIT images: SN 2004 UT R.A. (2000.0) Decl. Mag. Offset 2004bj Apr. 22.36 13 16 18.03 + 7 02 52.7 18.3 15".0 E, 6".3 N 2004bk Apr. 22.36 13 37 28.72 + 4 06 11.3 16.0 9".9 W, 4".8 S Additional KAIT magnitudes: SN 2004bj in MCG +01-34-13, Mar. 21.35 UT, [19.0; Apr. 2.38, [18.0; 23.35, 18.3. SN 2004bk in NGC 5246, Apr. 2.38, [19.0; 23.35, 15.9. COMET C/2002 T7 (LINEAR) E. S. Howell, Arecibo Observatory, reports that observations of the 18-cm OH lines in this comet, made with A. J. Lovell and F. P. Schloerb at Arecibo Observatory, result in the following production rates: Apr. 10.63 UT, log Q(OH) = 29.4; 15.60, 29.3; 16.59, 29.4; 17.59, 29.5 (uncertainties of order 10**28 mol/s). Line shapes are consistent with parent outflow velocities ranging from 1.7 to 2.0 km/s. Spectra obtained on Apr. 14-15 reveal an excess of 10-20 percent around cometocentric velocities of +3 km/s. 1999 DJ_4 L. A. M. Benner, Jet Propulsion Laboratory; M. C. Nolan, National Astronomy and Ionospheric Center, and Arecibo Observatory; S. J. Ostro and J. D. Giorgini, Jet Propulsion Laboratory; J. L. Margot, University of California, Los Angeles; and C. Magri, University of Maine at Farmington, report: "Arecibo delay-Doppler images (2380 MHz, 12.6 cm), obtained on Apr. 14-16, confirm that 1999 DJ_4 is a binary system (cf. IAUC 8316). Preliminary estimates of average diameters, based on range extents at 15-m resolution, are 420 and 200 m. The maximum range separation observed is more than 700 m." COMET C/2004 F4 (BRADFIELD) Visual total-magnitude estimates in bright twilight: Apr. 22.48 UT, 4.5 (A. Hale, Cloudcroft, NM, 0.2-m reflector); 23.21, 3.9 (J. J. Gonzalez, Leon, Spain, 0.20-m reflector; 0.1-deg tail in p.a. 20 deg); 23.48, 4.5: (Hale, 10x50 binoculars; 15' tail in p.a. 295 deg). (C) Copyright 2004 CBAT 2004 April 23 (8329) Daniel W. E. Green
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