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GRB 070125

Event type	Gamma-ray burst
Constellation	Gemini
Other designations	GRB 070125
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GRB 070125 is a gamma-ray burst (GRB) that was observed on January 25, 2007, by the InterPlanetary Network, which lasted for around 70 seconds. It is unique in that it did not occur in a galaxy, but in intergalactic space. This is unusual, since they are caused by the 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.

References

1. "Gamma Ray Explosion GRB 070125 Is A Cosmic Mystery". December 18, 2007. Retrieved January 19, 2022.
2. Chandra, P.; Cenko, S. B.; Frail, D. A.; Chevalier, R. A.; Macquart, J. P.; Kulkarni, S. R.; Bock, D. C. J.; Bertoldi, F.; Kasliwal, M.; Fox, D. B.; Price, P. A.; Berger, E.; Soderberg, A. M.; Harrison, F. A.; Gal-Yam, A.; Ofek, E. O.; Rau, A.; Schmidt, B. P.; Cameron, P. B.; Cowie, L. L.; Cowie, A.; Roth, K. C.; Dopita, M.; Peterson, B.; Penprase, B. E. (2008). "A Comprehensive Study of GRB 070125, A Most Energetic Gamma-Ray Burst". The Astrophysical Journal. 683 (1): 924–942. arXiv:0802.2748. Bibcode:2008ApJ...683..924C. doi:10.1086/589807. hdl:1885/35159. S2CID 40178169.
3. "A Gamma-Ray Burst Out of Nowhere". Sky and Telescope. 18 December 2007. Archived from the original on 2012-02-14. Retrieved 2019-08-22.
4. 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.

v t e Constellation of Gemini
List of stars in Gemini Gemini in Chinese astronomy
Stars	Bayer α (Castor) β (Pollux) γ (Alhena) δ (Wasat) ε (Mebsuta) ζ (Mekbuda) η (Propus) θ ι κ λ μ (Tejat) ν ξ (Alzirr) ο (Jishui) π ρ σ τ υ φ χ ω Flamsteed 1 3 6 25 30 37 38 (e) 57 (A) 64 (b) 65 (b) 74 (f) 81 (g) Variable R U TV BG DM DN OU WY V429 HR 2877 HD 44780 50554 63433 260655 Other 2MASS 0727+1710 CXOU J061705.3+222127 Geminga Gliese 251 HAT-P-20 HAT-P-24 HAT-P-33 LB-1 PSR J0659+1414 WD J0651+2844 WISEP J060738.65+242953.4
Exoplanets HAT-P-24b HAT-P-50b HD 50554 b HD 59686 Ab Pollux b τ Geminorum b
Star clusters	NGC 2129 2158 2266 2277 2355 2420 Other Koposov 2 Messier 35
Nebulae IC 443 IC 444 Medusa Nebula NGC 2371-2 NGC 2392
Galaxies	NGC 2291 2294 2357 Other 2MASX J07322028+3138009 IC 485 PKS 0735+178
Astronomical events GRB 070125
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