SN 2005bc

Supernova
name = SN 2005bc
type = Ia
SNRtype = unknown
host = NGC 5698
epoch = J2000.0
constellation = Boötes
ra = 14^h 37^m 15.050^s
dec = +38° 27′ 23.10″
gal = Long 66.764500°Lat 65.168763°
discovery = 2nd April 2005
iauc = [http://cfa-www.harvard.edu/iauc/08500/08504.html#Item2]
mag_v = +15.3
distance = about 200,000,000 light-years
progenitor = Unknown
progenitor_type = White Dwarf
b-v = Unknown
notes = None

SN 2005bc was a Type Ia supernova occurring in the barred-spiral galaxy NGC 5698 in the constellation of Boötes. SN 2005bc was discovered on 2nd April 2005 by LOSS and independently by Tim Puckett and L. Cox.

Discovery

The supernova was at magnitude 16.4 at discovery, and quickly rose to a peak magnitude of around 15.3 (in visible light) just over a week after discovery. By mid-May, the supernova had faded to 17th magnitude.

The host galaxy, NGC 5698, along with the supernova lie approximately 200 million light-years (~60 million parsecs) from Earth. This puts the absolute magnitude of the supernova at around −18.6 at maximum, rather faint for a Type Ia event.

As the supernova was of Type Ia, its progenitor star was a White Dwarf star which exceeded the Chandrasekhar limit.

Below is an image of SN 2005bc and NGC 5698 taken just over a week after peak brightness.