Letter to the Editor

JEM–X inflight performance ^*

¹ Danish Space Research Institute, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
² Metorex International Oy, Nihtisillankuja 5, PO Box 85, 02631 Espoo, Finland
³ Observatory, PO Box 14, 00014, University of Helsinki, Finland
⁴ Space Research Center, Bartycka 18A 00-716, Warsaw, Poland
⁵ Instituto de Astrofisica CNR, via del Fosso del Cavaliere 100, 00133 Rome, Italy
⁶ ENEA-Frascati UTS-Fusione, via Enrico Fermi 45, 00045 Frascati, Italy
⁷ IASF-Bologna, via Gobetti 101, 40129, Bologna, Italy
⁸ Dipartimento di Fisica, University of Ferrara, via del Paradiso 12, 44100 Ferrara, Italy
⁹ GACE, University of Valencia, PO Box 20085, 46071 Valencia, Spain
¹⁰ Stockholm University, Roslagstullgatan 21, Stockholm, Sweden
¹¹ Copernicus Astronomical Center, Bartycka 18, 00-716, Warsaw, Poland
¹² Instituto de Astrofísica de Andalucía (IAA-CSIC), PO Box 03004, 18080 Granada, Spain
¹³ Alenia Spazio, Space Division, Corso Marche 41, 10146 Torino, Italy
¹⁴ ESOC, Robert-Bosch Str. 5, 64293 Darmstadt, Germany
¹⁵ ESTEC, Keplerlaan 1, Postbus 299, 2200 AG Noordwijk, The Netherlands
¹⁶ Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
¹⁷ Max-Planck-Institut für Extraterrestrische Physik Gießenbachstr., 85748 Garching, Germany
¹⁸ INTEGRAL Science Data Center, Chemin d'Écogia 16, Versoix, Switzerland

Corresponding author: S. Brandt, sb@dsri.dk

Received: 15 July 2003
Accepted: 4 September 2003

Abstract

We summarize the inflight performance of JEM–X, the X–ray monitor on the INTEGRAL mission during the initial ten months of operations. The JEM–X instruments have now been tuned to stable operational conditions. The performance is found to be close to the pre-launch expectations. The ground calibrations and the inflight calibration data permit to determine the instruments characteristics to fully support the scientific data analysis.