Early detection of the Optical Transient following the Gamma-Ray Burst GRB 970228

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dc.creatorGuarnieri, A.
dc.creatorBartolini, C.
dc.creatorMasetti, N.
dc.creatorPiccioni, A.
dc.creatorCosta, E.
dc.creatorFeroci, M.
dc.creatorFrontera, F.
dc.creatorFiume, D. Dal
dc.creatorNicastro, L.
dc.creatorPalazzi, E.
dc.creatorCastro-Tirado, A. J.
dc.creatorGorosabel, J.
dc.date1997-07-15
dc.date.accessioned2026-07-07T07:42:32Z
dc.date.available2026-07-07T07:42:32Z
dc.descriptionThe optical counterpart of the Gamma-Ray Burst GRB 970228, discovered by Groot et al. (IAU Circ. 6584), is also detected in the B and R frames obtained about 4 hours earlier at the Bologna Observatory. Our observations indicate a very likely rise of the optical emission within these 4 hours. The R luminosity of the transient at maximum was about 15 times that of an underlying extended object. Follow-up data show that the maximum optical emission was delayed of not less than 0.7 days with respect to the gamma-ray peak and that no new big flares were seen after the main one. The optical transient became significantly redder once it has reverted to quiescence.
dc.description4 pages, no figures, LaTeX A&A style file L-AA version 3, accepted by Astronomy and Astrophysics Letters, also available at http://www.bo.astro.it/bap/BAPhome.html (file bap97-21-text.ps) or via anonymous ftp at boas3.bo.astro.it/bap/files/bap97-21-text.ps
dc.identifierhttps://arxiv.org/abs/astro-ph/9707164
dc.identifierhttp://arxiv.org/abs/astro-ph/9707164
dc.identifierAstron.Astrophys. 328 (1997) L13-L16
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/122477
dc.subjectAstrophysics
dc.titleEarly detection of the Optical Transient following the Gamma-Ray Burst GRB 970228
dc.typetext

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