Optical follow-up of GRB afterglows from UPSO, Naini Tal

dc.contributor.author	Pandey, S. B
dc.contributor.author	Sagar, R
dc.contributor.author	Mohan, V
dc.contributor.author	Pandey, A. K
dc.contributor.author	Bhattacharya, D
dc.contributor.author	Castro-Tirado, A. J
dc.date.accessioned	2008-05-14T12:05:02Z
dc.date.available	2008-05-14T12:05:02Z
dc.date.issued	2001
dc.identifier.citation	BASI, Vol. 29, No. 3, pp. 459 - 461	en
dc.identifier.uri	http://hdl.handle.net/2248/2307
dc.description.abstract	Successful optical photometric observations of five GRB afterglows namely GRB 990123, GRB 991208, GRB 991216, GRB 000301c and GRB 000926 have been carried out from State Observatory Naini Tal till 2000. The results and light curve parameters of these GRBs are summarised here. The optical light curves of these GRBs exhibit break (i.e., early and late time power law decay with different indices) generally around 2 days after the burst. The observed steepening in the afterglow light curves may be due to non-isotropic emission from the burst ejecta in the course of time. The non-isotropic energy emission from these GRBs is ??1052 ergs and can be understood in terms of current popular models for the origin of GRBs.	en
dc.format.extent	226647 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/2001BASI...29..459P	en
dc.subject	Photometric	en
dc.subject	Gamma-rays bursts	en
dc.title	Optical follow-up of GRB afterglows from UPSO, Naini Tal	en
dc.type	Article	en