Astron. Astrophys. Suppl. Ser.
Volume 138, Number 3, September 1999Gamma-Ray Bursts in the Afterglow Era Contents Rome, November 3-6, 1998
|Page(s)||455 - 456|
|Published online||15 September 1999|
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 $\O$, 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 $\O$, Denmark
Send offprint request to: J. Gorosabel
Accepted: 18 May 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
Based on observations collected at the German-Spanish Astronomical Centre, Calar Alto, operated by the Max-Planck-Institut für Astronomie, Heidelberg, jointly with the Spanish National Commission for Astronomy.
© European Southern Observatory (ESO), 1999