Abstract
view Abstract Citations (24) References (51) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Luminosity Distributions of Cosmological Gamma-Ray Bursts Hakkila, Jon ; Meegan, Charles A. ; Horack, John M. ; Pendleton, Geoffrey N. ; Briggs, Michael S. ; Mallozzi, Robert S. ; Koshut, Thomas M. ; Preece, Robert D. ; Paciesas, William S. Abstract The intrinsic luminosities of gamma-ray bursts are found to be constrained by the BATSE/PVO combined intensity distribution, assuming that (1) bursts originate in {LAMBDA} = 0, {OMEGA} = 1 Friedmann cosmology with a nonevolving density distribution, (2) the nonevolving intrinsic luminosity function can be modeled as a truncated power law, and (3) burst spectra are modeled as power laws with identical spectral indices. These simplifying assumptions allow constraints to be placed on luminosity functions in cosmological gamma-ray burst scenarios and indicate that standard-candle sources are not favored. In general, either the minimum burst luminosity L_min_ or the maximum burst luminosity L_max_ are known, with the opposite end of the luminosity function unconstrained. Both L_max_ and L_min_ must be specified for luminosity power-law indices near 2. When these results are combined with other studies measuring other cosmological burst signatures, it is possible that the intrinsic luminosity function contains more low-luminosity bursts than high-luminosity ones. Publication: The Astrophysical Journal Pub Date: May 1996 DOI: 10.1086/177134 Bibcode: 1996ApJ...462..125H Keywords: GAMMA RAYS: BURSTS full text sources ADS |
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