EDP Sciences
Free access
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 http://dx.doi.org/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. Schnopper17

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  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