SN 2008D
SN 2008D was an Ibc-type supernova that lit up in the galaxy NGC 2770 .
The discovery of the research satellite Swift happened by chance when the satellite observed the supernova SN 2007uy on January 9, 2008 , which was discovered only a few weeks earlier in the same galaxy. The discovery was made at an early stage, so the entire course of the supernova could be followed. The satellite observed an X-ray signal for about 400 seconds that was far stronger than the background level. Around 80 minutes later, other sensors on board recorded a sharp increase in brightness in the UV and visible range at this point. This was followed by a worldwide observation campaign with various instruments such as the Hubble space telescope , the Chandra X-ray satellite and observatories around the world.
Due to the afterglow in X-ray light and in optical light, the supernova was first classified as Type Ic. Later observations of the spectrum from SN 2008D indicated that no helium shell was shed before the explosion , which is a property of type Ib supernovae. Furthermore, the lack of hydrogen in the star's spectrum points to a Wolf-Rayet star as the predecessor of the supernova.
Coordinates ( equinox J2000.0 )
- Right ascension : 9h 9m 30.65s
- Declination : + 33 ° 8 '20.3 "
See also
Individual evidence
- ^ List of Supernovae
- ^ NASA's Swift Satellite Catches First Supernova in the Act of Exploding
- ↑ The strange supernova SN 2008D
- ↑ Spectrum of Science, September 2008, pp. 14–15, Death Scream in X-Ray Light