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Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/1878
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dc.contributor.authorSagar, R-
dc.contributor.authorPandey, A. K-
dc.contributor.authorMohan, V-
dc.contributor.authorYadav, R. K. S-
dc.contributor.authorNilakshi-
dc.contributor.authorBhattacharya, D-
dc.contributor.authorCastro-Tirado, A. J-
dc.date.accessioned2007-10-11T11:37:46Z-
dc.date.available2007-10-11T11:37:46Z-
dc.date.issued1999-
dc.identifier.citationBASI, Vol. 27, No. 1, pp. 3 - 7en
dc.identifier.urihttp://hdl.handle.net/2248/1878-
dc.description.abstractThe CCD magnitudes in Johnson $BV$ and Cousins $R$ photometric passbands are determined for the optical transient of GRB 990123. These observations have been taken approximately 12 hours after trigger of the gamma-ray burst. BVR photometric light curves are obtained by combining the published data with the present measurements. They indicate that the flux decay constants in $BV$ and $R$ passbands are almost the same. Its value is $1.1\pm 0.06$. Such decay is quite consistent with the fireball models for the optical transient.en
dc.format.extent393031 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAstronomical Society of Indiaen
dc.relation.urihttp://adsabs.harvard.edu/abs/1999BASI...27....3Sen
dc.subjectCCD magnitudesen
dc.subjectGRB 990123en
dc.subjectPhotometryen
dc.subjectGamma-rayen
dc.titleOptical follow up of the GRB 990123 sources from UPSO, Naini Talen
dc.typeArticleen
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