| Event type | Gamma-ray burst  |
|---|---|
| Constellation | Indus |
| Right ascension | 21h 01m 13.12s |
| Declination | −51° 06′ 22.5″ |
| Other designations | GRB 100621A |
GRB 100621A was a gamma-ray burst observed on June 21, 2010, by the Swift spacecraft.[1][2] It is the second brightest gamma-ray burst yet observed, after GRB 130427A.[3] The distance is reported to be approximately five billion light years, far outside our own Milky Way Galaxy.
- ^ Abramowski, A.; Aharonian, F.; Ait Benkhali, F.; Akhperjanian, A. G.; Angüner, E.; Anton, G.; Balenderan, S.; Balzer, A.; Barnacka, A.; et al. (23 April 2014). "Search for TeV Gamma-ray Emission from GRB 100621A, an extremely bright GRB in X-rays, with H.E.S.S.". Astronomy & Astrophysics. 565: A16. arXiv:1405.0488. Bibcode:2014A&A...565A..16H. doi:10.1051/0004-6361/201322984. S2CID 27988089.
- ^ "Swift Observation of Long GRB 100621A" (PDF). NASA. 22 July 2010. Retrieved 20 May 2023.
- ^ SpaceRef.com Record-Breaking X-ray Blast Briefly Blinds Space Observatory[permanent dead link] European Southern Observatory July 14, 2010