Limit on the average redshift of Gamma Ray Bursts from evolving galaxies

dc.contributor.author	Jain, D
dc.contributor.author	Panchapakesan, N
dc.contributor.author	Mahajan, S
dc.contributor.author	Bhatia, V. B
dc.date.accessioned	2008-03-05T11:35:11Z
dc.date.available	2008-03-05T11:35:11Z
dc.date.issued	2000
dc.identifier.citation	BASI, Vol. 28, No. 2, pp. 377 - 379	en
dc.identifier.uri	http://hdl.handle.net/2248/2127
dc.description.abstract	Identification of gravitationally lensed Gamma Ray Bursts (GRBs) in the BATSE 4B catalog can be used to constrain the average redshift <z> of the GRBs. Here we calculate an upper limit to <z>, independent of the physical model for GRBs, using a filled beam approximation to compute the lensing rate for GRBs at high z for a variety of cosmologies. The upper limit on <z> depends directly on the cosmological parameters ? and ?. The other factor which can change the <z> of GRBs is the evolution of the lensing galaxies. We find that merging of lensing galaxies puts the GRBs at higher redshift as compare to non evolving model of galaxies.	en
dc.format.extent	215913 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en	en
dc.publisher	Astronomical Society of India	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2000BASI...28..377J	en
dc.subject	Gravitational lensing	en
dc.subject	Gamma ray bursts	en
dc.subject	Evolution of galaxies	en
dc.title	Limit on the average redshift of Gamma Ray Bursts from evolving galaxies	en
dc.type	Article	en