GRB 070125

GRB 070125 is a gamma-ray burst (GRB) 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 this type of GRB 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.[1]

GRB 070125
Event typeGamma-ray burst Edit this on Wikidata
ConstellationGemini Edit this on Wikidata
Other designationsGRB 070125

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.[2]


  1. ^ "A Gamma-Ray Burst Out of Nowhere". Sky and Telescope. 18 December 2007. Retrieved 2019-08-22.
  2. ^ William G. Gilroy. "First science from the Large Binocular Telescope: Notre Dame astrophysicist reports gamma ray finding". Archived from the original on 2009-05-02. Retrieved 2009-08-09.

Coordinates:   07h 51m 17.77s, +31° 09′ 04.1″