1995/01/18 by F. W. Stecker, O. C. de Jager, O. C. De Jager · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Cosmic microwave background #Dark Matter and Cosmic Phenomena #Galaxy #Gamma ray #Intergalactic dust #Intergalactic travel #Opacity #Optics #Particle Detector Development and Performance #Photon #Physics #Redshift #astro-ph #hep-ph
paper · pdf · doi:10.1007/bf00195048
published as Space Sci.Rev.75:401-412,1996 · 12 pg., uuencoded, Z-compressed ps file (includes figures), To be published in Space Sci. Rev
arxiv created 1995/01/18 · openalex publication_date 1996/01/01 · arxiv updated 2011/04/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Following our previously proposed technique, we have used the recent gamma-ray observations of Mrk 421 to place theoretically significant constraints on and possible estimates of the intergalactic infrared radiation field (IIRF) which are consistent with normal galactic IR production by stars and dust and rule out exotic mechanisms proposed to produce a larger IIRF. Using models for the low energy intergalactic photon spectrum from microwave to UV energies, we calculate the opacity of inter- galactic space to gamma-rays as a function of energy and redshift. These calculations indicate that the GeV gamma-ray burst recently observed by the EGRET experiment on CGRO originates at a redshift less than approximately 1.5.