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Spectroscopy of High-Redshift Supernovae from the ESSENCE Project: The First Four Years
R. J. Foley, T. Matheson, S. Blondin +23
We present the results of spectroscopic observations from the ESSENCE high-redshift supernova (SN) survey during its first four years of operation. This sample includes spectra of…
Time evolution of the line emission from the inner circumstellar ring of SN 1987A and its hot spots
Per Groeningsson, Claes Fransson, Bruno Leibundgut +4
We present seven epochs between October 1999 and November 2007 of high resolution VLT/UVES echelle spectra of the ejecta-ring collision of SN 1987A. The fluxes of most of the narro…
The Evolution of Late-Time Optical Emission From SN 1979C
D. Milisavljevic, R. Fesen, R. Kirshner +1
Optical spectra of the bright Type II-L supernova SN 1979C obtained in April 2008 with the 6.5 m MMT telescope are compared with archival late-time spectra to follow the evolution…
Optical and IR observations of SN 2002dj: some possible common properties of fast expanding SNe Ia
G. Pignata, S. Benetti, P. A. Mazzali +17
As part of the European Supernova Collaboration we obtained extensive photometry and spectroscopy of the type Ia SN 2002dj covering epochs from 11 days before to nearly two years a…
Time Dilation in Type Ia Supernova Spectra at High Redshift
S. Blondin, T. M. Davis, K. Krisciunas +29
We present multiepoch spectra of 13 high-redshift Type Ia supernovae (SNe Ia) drawn from the literature, the ESSENCE and SNLS projects, and our own separate dedicated program on th…
The Evolution of Late-time Optical Emission from SN 1986J
D. Milisavljevic, R. Fesen, B. Leibundgut +1
We present late-time optical images and spectra of the Type IIn supernova SN 1986J. HST ACS/WFC images obtained in February 2003 show it to be still relatively bright with m(F606W)…