 SN 2005bc just over a week after peak brightness | |
| Event type | Supernova |
|---|---|
| Type Ia1 | |
| Date | c. 129.3 million years ago (detected 2 April 2005 by Tim Puckett and L. Cox1) |
| Constellation | Boötes |
| Right ascension | 14h 37m 14.78s1 |
| 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 56981 |
| Progenitor type | white dwarf |
| Peak apparent magnitude | +16.61 |
| Other designations | SN 2005bc |
SN 2005bc was a Type Ia supernova3 occurring in the barred spiral galaxy NGC 5698,1 located in the northern constellation of Boötes. 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.
References
References
- Barbon, R.; et al. (2008), "Asiago Supernova Catalogue", CDS/ADC Collection of Electronic Catalogues, vol. 1, Bibcode:2008yCat....1.2024B.
- Tully, R. Brent; et al. (August 2016), "Cosmicflows-3", The Astronomical Journal, 152 (2): 21, arXiv:1605.01765, Bibcode:2016AJ....152...50T, doi:10.3847/0004-6256/152/2/50, S2CID 250737862, 50.
- Modjaz, M.; Kirshner, R.; Challis, P.; Nutzman, P. (April 2005), Green, D. W. E. (ed.), "Supernova 2005bc in NGC 5698", Central Bureau Electronic Telegrams, 132 (1): 1, Bibcode:2005CBET..132....1M.
- Burket, J.; et al. (April 2005), Green, D. W. E. (ed.), "Supernovae 2005az, 2005bb, and 2005bc", IAU Circular, 8504 (2): 2, Bibcode:2005IAUC.8504....2B.