SN 2005bc just over a week after peak brightness
| |
| Event type | Supernova |
|---|---|
| Type Ia[1] | |
| Date | c. 129.3 million years ago (detected 2 April 2005 by Tim Puckett and L. Cox[1]) |
| Constellation | Boötes |
| Right ascension | 14h37m 14.78s[1] |
| Declination | +38° 27′ 23.1″[1] |
| Epoch | J2000.0 |
| Galactic coordinates | Long 66.76° Lat 65.17° |
| Distance | 129.3 Mly (39.63 Mpc)[2] |
| Redshift | 0.0132, 0.0122  |
| Host | NGC 5698[1] |
| Progenitor type | white dwarf |
| Peak apparent magnitude | +16.6[1] |
| Other designations | SN 2005bc |
SN 2005bc was a Type Ia supernova[3] occurring in the barred spiral galaxy NGC 5698,[1] located in the northern constellationofBoötes. SN 2005bc was discovered on 2 April 2005 by LOSS and independently by Tim Puckett and L. Cox.[4] It was positioned at an offset of 4.6″ east and 7.5″ north of the galactic nucleus.[1] 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. It showed an expansion velocity of 12,000 km/s.[3] By mid-May, the supernova had faded to 17th magnitude.
The host galaxy, NGC 5698, along with the supernova lie approximately 129 million light-years (~40 million parsecs) from Earth.[2] As the supernova was of Type Ia, its progenitor star was a compact white dwarf star that exceeded the Chandrasekhar limit.
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