S. Jha, P. Garnavich, P. Challis and R. Kirshner, Harvard- Smithsonian Center for Astrophysics, report that a spectrum of SN 1999ec, obtained by P. Berlind on Oct. 4.5 UT with the F. L. Whipple Observatory 1.5-m telescope (+ FAST spectrograph), reveals it to be a type-Ib supernova past maximum light. The spectrum exhibits prominent He I absorption and weaker Fe II features. The recession velocity of NGC 2207, measured via narrow emission lines from a superimposed H II region, is 2740 km/s.
International Astronomical Union Circular
- Pub Date:
- October 1999