Supernova 1999E in Anonymous Galaxy
Abstract
E. Cappellaro and M. Turatto, Padova Observatory; and P. Mazzali, Trieste Observatory, write: "Based on the spectrum taken by Jha et al., given at http://cfa-www.harvard.edu/cfa/oir/Research/supernova/spectra/sn99e.99Jan19.gif, and on the description on IAUC 7090 of the Filippenko spectrum, SN 1999E is very similar to SN 1997cy (Turatto et al., in preparation). Although the evolution is very slow, the best match is with the spectrum taken about 4 months after discovery (http://athena.pd.astro.it/~supern/news/sn97cy_251198.gif), with emission lines of H, Ca II, and [Fe II] resulting from the interaction of the ejecta with a dense circumstellar material, as in SN 1988Z (Turatto et al. 1993, MNRAS 262, 128). SN 1997cy has been associated with GRB 970514 (Woosley et al., Ap.J., submitted, and http://xxx.lanl.gov/abs/astro-ph/?9806299), it reached M_v > = -20.06 (H_0 = 65 km sE-1 MpcE-1), and it was to our knowledge the intrinsically brightest supernova ever discovered. Based on the analogy with 1997cy, we expect that the spectral evolution and the luminosity decline of 1999E will both be very slow."
- Publication:
-
International Astronomical Union Circular
- Pub Date:
- January 1999
- Bibcode:
- 1999IAUC.7091....1C