GRB 070125
| Other designations | GRB 070125 |
|---|---|
| Event type |
Gamma-ray burst  |
| Date |
25 January 2007 |
| Constellation |
Gemini |
GRB 070125 is a gamma-ray burst that occurred on 2007 January 25. It is unique in that it did not occur in a galaxy, but in intergalactic space. This is unusual, since GRBs are caused by hypernovae of young massive stars, which usually means having to reside in a galaxy, as almost all stars are formed in galaxies, particularly high mass ones. It has a redshift of 1.55, which equals to a light travel distance of 9.5 billion years.
It is theorized that the star formed in the tidal tail resulting from the interaction of two nearby galaxies, deep in intergalactic space.
A month after it was detected, the Large Binocular Telescope observed a 26th magnitude optical afterglow from the gamma ray burst[1]
Sources
- Sky and Telescope, "A Gamma-Ray Burst Out of Nowhere", 18 December 2007 (accessed 18 June 2008)
References
- ↑ "Archived copy". Archived from the original on 2009-05-02. Retrieved 2009-08-09. "First science from the Large Binocular Telescope: Notre Dame astrophysicist reports gamma ray finding" By: William G. Gilroy
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