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Circular No. 6708 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) BMARSDEN@CFA.HARVARD.EDU or DGREEN@CFA.HARVARD.EDU (science) URL http://cfa-www.harvard.edu/cfa/ps/cbat.html Phone 617-495-7244/7440/7444 (for emergency use only) SUPERNOVA 1997cz IN ANONYMOUS GALAXY The Mount Stromlo Abell Cluster Supernova Search Team (cf. IAUC 6639) reports the discovery of an apparent supernova (V = 20.5) on V and R CCD images taken on July 19 by S. Sabine at the Mount Stromlo 1.27-m telescope (+ Macho Camera). SN 1997cz is located near Abell 3565 at R.A. = 13h37m09s.39, Decl. = -33o47'31".9 (equinox 2000.0). A nearby star has position end figures 13s.08, 36".4. SN 1997cz was also present at approximately the same magnitude on similar V and R frames taken on July 21 and June 10, but it is not visible on images taken on Apr. 26 (limiting mag R = 21). SUPERNOVA 1997cy IN ANONYMOUS GALAXY S. Benetti and A. Pizzella, European Southern Observatory; and P. J. Wheatley, University of Leicester, report: "A fully-reduced CCD spectrum (range 320-880 nm, resolution 2.0 nm) of SN 1997cy (cf. IAUC 6706), obtained on July 24.43 UT with the Danish 1.5-m telescope (+ DFOSC), is dominated by an intense emission line with a composite profile. Its narrow component is centered at 698.4 nm (FWHM = 4.0 nm), and it is superimposed on a broader one (centered at about 697.0 nm, FWHM about 13.0 nm) that has a very steep red wing. If this feature is identified with H-alpha, then a redshift of 0.0642 is deduced for this supernova. The bluer part of the spectrum shows strong and broad Fe II features resembling those shown by some type-Ic supernovae near maximum; peaks are measured at about 493.0 nm (FWHM about 15.8 nm), 529.0 nm (FWHM about 12.0 nm), and 580.0 nm (FWHM about 45.0 nm). Another very broad emission (FWHM about 70.0 nm) is centered at about 785.5 nm. A relatively faint H-beta emission is also present (peak at 518.0 nm, FWHM = 2.7 nm). Spectroscopic and photometric follow-up of this peculiar type-II supernova is encouraged." BL LACERTAE F. Makino, J. Mattox, T. Takahashi, and J. Kataoka, Insitute of Space and Astronautical Science (ISAS); and H. Kubo, Physical and Chemical Research Institute (Riken), Wako, report: "ASCA observed this source during July 18.60-19.62 UT, yielding an average x-ray flux of 2.6 x 10E-11 erg sE-1 cmE-2 (2-10 keV), which is more than four times higher than that observed in its low state with Ginga (Kawai et al. 1991, Ap.J. 382, 508). The spectrum was of power-law type with photon index of -1.44 +/- 0.01. The flux showed variation by a factor of 2 during the observation." (C) Copyright 1997 CBAT 1997 July 24 (6708) Daniel W. E. Green
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