NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-19 T00:03:32 PDT
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For refcode 2000IAUC.7352A...1C:
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2000IAUC.7352A...1C Circular No. 7352 Central Bureau for Astronomical Telegrams INTERNATIONAL ASTRONOMICAL UNION SUPERNOVA 2000C IN NGC 2415 E. Cappellaro and M. Turatto, Osservatorio Astronomico di Padova, report that spectra of SN 2000C (cf. IAUC 7348) have been obtained by A. Pizzella, E. M. Corsini, and D. Moro with the Asiago 1.22-m telescope (+ Boller & Chivens spectrograph) on Jan. 25.9 UT and by G. Galletta with the 1.8-m telescope (+ AFOSC) on Jan. 27.9 (range 350-750 nm, resolution 2 nm). The calibrated spectra are very similar to that of the type-Ic supernovae 1987M and 1990aa, 1-2 weeks after maximum (cf. Filippenko et al. 1992, Ap.J. 384, L37), with prominent Ca II and Fe II features. Also visible is an absorption at 625 nm that, if attributed to Si II 635.5-nm (as in the case of SN 1987M), indicates an expansion velocity of about 9000 km/s. Therefore, despite the apparent coincident location, SN 2000C is a distinct object from SN 1998Y. S. Jha, P. Challis, and R. Kirshner, Harvard-Smithsonian Center for Astrophysics, report that a spectrum of SN 2000C, taken by P. Berlind on Jan. 28.14 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST spectrograph), reveals it to be a type-Ic supernova near maximum light. The spectrum shows a blue continuum with broad absorption features of Ca II, Mg II, Fe II, Na I, Si II, and O I, and is similar to maximum-light spectra of SN 1987M and SN 1994I (Filippenko 1997, Ann. Rev. A.Ap. 35, 309). Superimposed narrow emission lines yield a host galaxy recession velocity of 3710 km/s. 2000 January 28 (7352) Daniel W. E. Green
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