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5 papers
High-resolution optical studies of nearby Type Ia supernovae
Peter Lundqvist, Seppo Mattila, Jesper Sollerman +5
Since April 2000, a program using the ESO/VLT/UVES to search for early circumstellar signatures from nearby supernovae has been conducted. Until now, two Type Ia supernovae have be…
The Luminosity Function of MS2255.7+2039 at z=0.288
M. Naslund, C. Fransson, M. Huldtgren
The luminosity function of MS2255.7+2039 at z=0.288 is determined down to a total magnitude of R ~ 24, corresponding to M_R ~ -17 (H_0 = 50 km/s/Mpc). The data are corrected for in…
Rates and redshift distribution of high-z supernovae
Tomas Dahlen, Claes Fransson
Using observed star formation rates at redshifts up to z ~ 5, we calculate cosmic supernova rates for core collapse and Type Ia supernovae. Together with supernova statistics and d…
High z supernovae with the NGST
Tomas Dahlen, Claes Fransson
We use different assumptions for the combination of dust extinction and star formation up to redshifts z >= 5, as well as detailed modeling of supernova properties, to estimate the…
Circumstellar Interaction in SN 1993J
C. Fransson, P. Lundqvist, R. A. Chevalier
The radio and X-ray observations of SN 1993J during the first year can be consistently explained as a result of interaction of the expanding ejecta with a circumstellar medium. The…