Observations of GRBs with the Infrared Space Observatory^*

¹ Department of Experimental Physics, University College Dublin, Belfield, Stillorgan Road, Dublin 4, Ireland
² ISO Science Operations Centre, Astrophysics Division, Space Science Department of ESA, Villafranca, Spain
³ Stockholm Observatory, SE-133 36 Saltsjöbaden, Sweden
⁴ Cork Institute of Technology, Cork, Ireland
⁵ LAEFF, Villafranca del Castillo, P.O. Box 50727, 28080 Madrid, Spain
⁶ IAA-CSIC, P.O. Box 03004, 18080 Granada, Spain
⁷ Istituto Astrofisica Spaziale, CNR, 00133 Roma, Italy
⁸ ITESRE-CNR, Bologna, Italy
⁹ Astronomical Institute "Anton Pannekoek", University of Amsterdam, The Netherlands
¹⁰ SRON Utrecht, The Netherlands
¹¹ USRA at NASA/MSFC, Huntsville AL, U.S.A.
¹² Physics Department, University of Alabama, Huntsville AL, U.S.A.

Received: 18 December 1998
Accepted: 10 March 1999

Abstract

We present results from the Target of Opportunity (TOO) program to observe GRB locations with the CAM and PHOT instruments aboard the Infrared Space Observatory (ISO). Four BeppoSAX GRB error circles were observed by ISO on timescales ranging from days to months after the GRB events. These observations represent the first prompt GRB counterpart searches at far-infrared wavelengths. A list of observations made in this TOO program, along with results of CAM follow-up observations of GRB 970508, are presented. A marginal CAM (12 μm) detection of a source, consistent with the position of the optical transient of GRB 970508, is reported.