Supernovae 2004gg, 2004gh, 2004gi
Abstract
G. Folatelli, M. Hamuy, N. Morrell, and M. Phillips, Carnegie Supernova
Project, report that CCD spectra (range 360-900 nm) of SN 2004gg, SN 2004gh, and SN 2004gi (IAUC 8444) were obtained by M. Roth on Nov. 25 and 26 UT, using the Magellan II (Clay) telescope (+ LDSS-2 spectrograph) at Las Campanas Observatory. The spectrum of 2004gg closely resembles that of the peculiar type-II SN 1987K, approximately 1 week after maximum light. SN 2004gh is a type-II supernova, about 1 month after explosion, showing a prominent H_alpha P-Cyg profile and an expansion velocity of 4000 km/s, as inferred from the absorption minimum of H_beta and assuming the recession velocity of the host galaxy to be 3662 km/s, as given in the NED database. The spectrum of SN 2004gi is that of a type-Ia supernova, about 25 days after maximum light.- Publication:
-
International Astronomical Union Circular
- Pub Date:
- December 2004
- Bibcode:
- 2004IAUC.8447....3F