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Circular No. 6297 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION Postal Address: Central Bureau for Astronomical Telegrams Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A. IAUSUBS@CFA.HARVARD.EDU or FAX 617-495-7231 (subscriptions) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) Phone 617-495-7244/7440/7444 (for emergency use only) COMET 1996 B1 The following precise CCD positions have been reported: 1996 UT R.A. (2000) Decl. m2 Observer Jan. 29.30575 14 01 52.13 +53 32 39.1 14.3 Offutt 29.34873 14 01 43.11 +53 32 11.0 14.2 " 29.54324 14 01 02.86 +53 29 49.0 Kojima 29.55270 14 01 00.95 +53 29 42.8 " 29.68130 14 00 33.90 +53 28 16.6 Kobayashi 29.68812 14 00 32.50 +53 28 12.5 " 29.72067 14 00 25.62 +53 27 50.5 Asami 29.74031 14 00 21.10 +53 27 37.1 " 29.78403 14 00 11.82 +53 27 07.5 Kushida 29.79757 14 00 08.81 +53 26 57.9 " 29.87426 13 59 53.10 +53 25 52.1 Pravec 29.88146 13 59 51.63 +53 25 47.0 " W. Offutt (Cloudcroft). 0.6-m f/7 Ritchey-Chretien. T. Kojima (Chiyoda). 0.25-m f/6.0 reflector. Strong condensation. J. Kobayashi (Kumamoto). 0.41-m f/5.0 reflector. Visually m1 = 8.8. A. Asami (Hadano). 0.20-m f/4.0 reflector. Y. and R. Kushida (Yatsugatake). 0.25-m f/6.3 Schmidt-Cassegrain. P. Pravec (Ondrejov). 0.65-m f/3.6 reflector. EUVE J2115-58.6 N. Craig, University of California at Berkeley, reports: "An optical counterpart for EUVE J2115-58.6 has been identified as a magnetic CV, probably an AM Her-type cataclysmic variable. The field, centered at R.A. = 21h15m41s, Decl. = -58d40'48" (equinox 2000.0), was observed as part of the EUVE Optical ID Campaign on 1995 Dec. 10.063 UT with the 1.5-m telescope (Loral) at Cerro Tololo. The proposed optical counterpart, at R.A. = 21h15m41s, Decl. = -58d40'54", well within the source error circle, is a star of estimated mv = 16.0. The optical spectrum clearly shows the characteristics of a cataclysmic-variable spectrum, with the typical Balmer emission lines, as well as lines of He I, Ca II and strong He II emission. The continuum increases sharply toward the blue at short wavelengths. The CV EUVE J2115-58.6 was detected during the all-sky survey in the EUVE Lexan/B band (5.8-17.4 nm, 0.07-0.21 keV) on 1992 Oct. 20, and also during the gap-filling on 1993 Apr. 19. A countrate of 0.05 cts/s is calculated. Monitoring photometric and spectroscopic observations are urged." (C) Copyright 1996 CBAT 1996 January 29 (6297) Brian G. Marsden
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