W49B
| File:W49B image.jpg The nebula W49B as imaged by the Chandra X-Ray Observatory (blue) and the Palomar 200-inch (5.1 m) telescope (red, green) | |
| Event type | Supernova remnant, astronomical radio source, astrophysical X-ray source  |
|---|---|
| S | |
| Constellation | Aquila |
| Right ascension | 19h 11m 09s |
| Declination | +09° 06' 24 |
| Epoch | J2000.0 |
| Galactic coordinates | 043.275 -00.190 |
| Distance | 35.000 Ly |
| Remnant | ? |
| Peak apparent magnitude | ? |
| Other designations | SNR G043.3-00.2, 1ES 1908+09.0, 3C 398, 3C 398.0, 4C 09.63, 3FHL J1911.0+0905, 3CR 398, AJG 95, 2FGL J1911.0+0905, 3FGL J1910.9+0906, 2FHL J1911.0+0905 |
W49B or SNR G043.3-00.2 or 3C 398 is a nebula and is thought to be a remnant of a gamma-ray burster. If so, it is the first one found.
W49B is barrel-shaped and located roughly 35,000 light-years from Earth. Recent findings indicate infrared "rings" (about 25 light-years in diameter) around the "barrel," and also indicate intense X-ray radiation coming from nickel and iron along its axis. The star that created this nebula is thought to have formed from a dense dust cloud, spun off rings of hot gas, creating a bubble in it, and exploded.
References
- (June 2, 2004) "NASA Chandra Observation of Supernova W49B Supernova Points to Ancient Gamma Ray Burst". Spaceref.com.
- (September 19, 2006) "A Near-Infrared and X-ray Study of W49B: A Wind Cavity Explosion". The Astrophysical Journal.
External links
See also
- Westerhout 49 (W49)
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