SN 2002dy
SN 2002dy was discovered by the KAIT team on images taken on July 8.5
and 9.5 UT (mag about 17.0). MCG -01-59-24, the host galaxy of SN 2002dy,
is a distant spiral galaxy, which makes a pair with MCG -01-59-25 (1'.3
NE). The CfA spectrum taken on July 10.47 UT revealed that it is of type
II, and the narrowness (FWHM = 3100 km/s) of the hydrogen emission suggest
that it would be of type IIn. The discovery magnitude is as bright as
the expected maximum for typical SN Ia, which is consistent with bright
SN IIn nature. Such bright SN IIn, which somebody call as "type IIn hypernovae",
are thought to be related with the gamma-ray bursts (GRBs), but no GRB
detection in this field was reported in these three months (vsnet-campaign-sn
450).