Optical follow up of the GRB 990123 source from UPSO, Nainital

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dc.creatorSagar, R.
dc.creatorPandey, A. K.
dc.creatorMohan, V.
dc.creatorYadav, R. K. S.
dc.creatorNilakshi
dc.creatorBhattacharya, D.
dc.creatorCastro-Tirado, A. J.
dc.date1999-02-13
dc.date1999-02-17
dc.date.accessioned2026-07-07T02:30:26Z
dc.date.available2026-07-07T02:30:26Z
dc.descriptionThe 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.
dc.descriptionLaTex file, 5 pages with 1 figure. Bull. Astron. Society India, Vol. 27 (accepted)
dc.identifierhttps://arxiv.org/abs/astro-ph/9902196
dc.identifierhttp://arxiv.org/abs/astro-ph/9902196
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/13818
dc.subjectAstrophysics
dc.titleOptical follow up of the GRB 990123 source from UPSO, Nainital
dc.typetext

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