Free access article

Issue A&A Volume 411, Number 1, November III 2003 Special letters issue on: first science with integral Page(s) L231 - L238 Section Letters DOI 10.1051/0004-6361:20031358

A&A 411, L231-L238 (2003)
DOI: 10.1051/0004-6361:20031358

Letter

JEM-X: The X-ray monitor aboard INTEGRAL

N. Lund¹, C. Budtz-Jørgensen¹, N. J. Westergaard¹, S. Brandt¹, I. L. Rasmussen¹, A. Hornstrup¹, C. A. Oxborrow¹, J. Chenevez¹, P. A. Jensen¹, S. Laursen¹, K. H. Andersen¹, P. B. Mogensen¹, I. Rasmussen¹, K. Omø¹, S. M. Pedersen¹, J. Polny¹, H. Andersson², T. Andersson², V. Kämäräinen², O. Vilhu³, J. Huovelin³, S. Maisala³, M. Morawski⁴, G. Juchnikowski⁴, E. Costa⁵, M. Feroci⁵, A. Rubini⁵, M. Rapisarda⁶, E. Morelli⁷, V. Carassiti⁸, F. Frontera⁸, C. Pelliciari⁸, G. Loffredo⁸, S. Martínez Núñez⁹, V. Reglero⁹, T. Velasco⁹, S. Larsson¹⁰, R. Svensson¹⁰, A. A. Zdziarski¹¹, A. Castro-Tirado¹², P. Attina¹³, M. Goria¹³, G. Giulianelli¹³, F. Cordero¹⁴, M. Rezazad¹⁴, M. Schmidt¹⁴, R. Carli¹⁵, C. Gomez¹⁵, P. L. Jensen¹⁵, G. Sarri¹⁵, A. Tiemon¹⁵, A. Orr¹⁵, R. Much¹⁵, P. Kretschmar¹⁶ and H. W. Schnopper<sup>17

1</sup>  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  MPI Extraterr. Physik, Gießenbachstr., 85748 Garching and ISDC, Chemin d'Écogia 16, Versoix, Switzerland
¹⁷  Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MA 02138, USA

(Received 15 July 2003 / Accepted 3 September 2003 )

Abstract
The JEM-X monitor provides X-ray spectra and imaging with arcminute angular resolution in the 3 to 35 keV band. The good angular resolution and the low energy response of JEM-X plays an important role in the identification of gamma ray sources and in the analysis and scientific interpretation of the combined X-ray and gamma ray data. JEM-X is a coded aperture instrument consisting of two identical, coaligned telescopes. Each of the detectors has a sensitive area of 500 cm ², and views the sky through its own coded aperture mask. The two coded masks are inverted with respect to each other and provides an angular resolution of 3 ' across an effective field of view of about 10° diameter.

Key words: instrumentation: detectors -- X-rays: general

Offprint request: N. Lund, nl@dsri.dk

© ESO 2003

What is OpenURL?