Abstract:
This paper describes the aims, objectives and first results of the observational program
for the study of distant core-collapse supernovae (SNe) with redshifts z≤0.3. This work is
done within the framework of an international cooperation programon the SNe monitoring at
the 6-m BTA telescope of the Special Astrophysical Observatory of the Russian Academy of
Sciences, and other telescopes. We study both the early phases of events (SN type determina-
tion, redshift estimation, and a search for manifestations of a wind envelope), and the nebular
phase (the effects of explosion asymmetry). The SNe, associated with cosmic gamma-ray
bursts are of particular interest. An interpretation of our observational data along with the
data obtained on other telescopes is used to test the existing theoretical models of both the
SN explosion, and the surrounding circumstellar medium. In 2009 we observed 30 objects; the
spectra were obtained for 12 of them. We determined the types, phases after maximum, and
redshifts for five SNe (SN 2009db, SN 2009dy, SN 2009dw, SN 2009ew, SN 2009ji). Based
on the obtained photometric data a discovery of two more SNe was confirmed (SN 2009bx
and SN 2009cb). A study of two type II supernovae in the nebular phase (SN 2008gz and
SN 2008in) is finalized, four more objects (SN 2008iy, SN 2009ay, SN 2009bw, SN 2009de)
are currently monitored.
