SN 2007uy
From Wikipedia, the free encyclopedia
From Wikipedia, the free encyclopedia
SN 2007uy was a supernova that occurred in the spiral galaxy NGC 2770. It was discovered by Yoji Hirose on December 31, 2007 from Chigasaki city in Japan,[4] approximately four days after the explosion.[3] The position of the supernova was offset 20.6″ east and 15.5″ south of the galaxy's nucleus,[2] near a star-forming region.[5] It was identified as a Type Ib supernova from its spectrum a week before reaching maximum, and appeared the most similar to SN 2004gq.[1]
| Event type | Supernova |
|---|---|
| Type Ib[1] | |
| Date | December 31, 2007[2] |
| Constellation | Lynx |
| Right ascension | 09h 09m 35.28s[2] |
| Declination | +33° 07′ 09.2″[2] |
| Epoch | J2000 |
| Galactic coordinates | l = 191.58°, b = +42.2°[2] |
| Distance | 96.2 ± 5.9 Mly (29.5 ± 1.8 Mpc)[3] |
| Redshift | 0.0065[2] |
| Host | NGC 2770[2] |
| Peak apparent magnitude | 17.2[2] |
| Total energy output | ~1.5×1051 erg[3] |
Emissions from SN 2007uy were detected from the X-ray to the radio band.[6] The light from this event was heavily reddened due to intervening dust in the host galaxy. This energetic explosion released ~1.5×1051 erg in energy and ejected a mass of 4.4 M☉.[3] The progenitor was likely a massive star that had been stripped of its hydrogen envelope by a binary companion.[5] There is no radio evidence of a relativistic jet of the type that would be associated with a gamma-ray burst.[6]
While interesting in its own right, SN 2007uy was overshadowed by SN 2008D, a supernova whose burst was observed serendipitously while SN 2007uy was being studied by Swift, something unprecedented in astronomy.[7] This second supernova occurred within ten days of the first.[6]
