UvA-DARE ( Digital Academic Repository ) Optical and near-infrared follow-up observations of GRB

Content Provider	Semantic Scholar
Author	Palazzi, Eliana Pian, Elena Masetti, Nicola Nicastro, Luciano Vreeswijk, P. Galama, Titus J. Groot, P. Frontera, Filippo Valle, Massimo Della Lidman, Chris Kouveliotou, Chryssa Pizzichini, Graziella Paradijs, J. A. Van Pedersen, H. Mannucci, Filippo Martino, M. Di Diercks, Alan Hodgdon Amati, Lorenzo Benetti, Stefano Castro-Tirado, Alberto J. Clasen, J. Costa, Enrico Fiume, Daniele Dal Falomo, Renato Feroci, Marco Fynbo, Johan Heise, John Zand, Jean In't Piro, Luigi Robinson, C. Tornikoski, Merja Valtaoja, Esko Zapatero-Osorio, Maria Rosa Lamb, D. Quashnock, Jean M. Berk, D. Van Den
Copyright Year	1998
Abstract	We imaged the field of GRB980329 in the optical and in the near-infrared starting 20 hours after the event, at the ESO NTT, at the NOT, at the APO and at the TIRGO. In the first night we detect an object of R = 23.6 ± 0.2 within the BeppoSAX NFI error box at the same position as a transient VLA source proposed as the radio afterglow of this GRB. The source faded by1.6 ± 0.5 magnitudes in 2.1 days, similarly to the decays of previous GRB optical afterglows. This transient is likely the optical counterpart of GRB980329. In the nearinfrared we detect signal at 2σ significance, whose position is only marginally consistent with that of the VLA source. The spectrum of the transient bears the signatures of substantial absorption within the GRB host galaxy. The afterglow energetics Send offprint requests to : eliana@tesre.bo.cnr.it are interpreted as synchrotron radiation from an expanding blast wave.
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Language	English
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Resource Type	Article