Astron. Astrophys. Suppl. Ser. 138, 455-456
J. Gorosabel 1 - A.J. Castro-Tirado 1,2 - H. Pedersen 3 - J. Greiner 4 - D. Thompson 5 - M. Guerrero 6 - A. Oscoz 6 - N. Sabalisck 6 - E. Villaver 6 - N. Lund 7
Send offprint request: J. Gorosabel (jgu@laeff.esa.es)
1 - Laboratorio de Astrofísica Espacial y Física
Fundamental (LAEFF-INTA), P.O. Box 50727, E-28080 Madrid, Spain
2 - Instituto de Astrofísica de Andalucía (IAA-CSIC), P.O. Box
03004, E-18080 Granada, Spain
3 - Copenhagen University Observatory, Juliane Maries Vej 30 DK 2100
Copenhagen , Denmark
4 - Astrophysikalisches Institut Potsdam, D-14482 Potsdam, Germany
5 - Max-Planck-Institut für Astronomie, Heidelberg, Germany
6 - Instituto de Astrofísica de Canarias, E-38200 La Laguna,
Tenerife, Spain
7 - Danish Space Research Institute, Juliane Maries Vej 30 DK-2100
Copenhagen , Denmark
Received December 29, 1998; accepted May 18, 1999
We report on near-infrared and optical observations of the GRB 970616
error box and of the X-ray sources discovered by ASCA and ROSAT in the
region. No optical transient was found either within the IPN band or
in the X-ray error boxes, similarly to other bursts, and we suggest
that either considerable intrinsic absorption was present (like GRB
970828) or that the optical transient displayed a very fast decline
(like GRB 980326 and GRB 980519).
Key words: methods: observational -- gamma-rays: bursts
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