JEM-X: The X-ray monitor aboard INTEGRAL

Niels Lund, Carl Budtz-Jørgensen, Niels Jørgen Stenfeldt Westergaard, Søren Kristian Brandt, Ib Lundgaard Rasmussen, Allan Hornstrup, Carol Anne Oxborrow, Jérôme Chenevez, Poul Anker Jensen, Steen Laursen, KH. Andersen, P.B. Mogensen, Ib Rasmussen, K. Omo, Søren Møller Pedersen, Jozef Polny, H. Andersson, T. Andersson, V. Kamarainen, O. VilhuJ. Huovelin, S. Maisala, M. Morawski, G. Juchnikowski, E. Costa, M. Feroci, A. Rubini, M. Rapisarda, E. Morelli, V. Carassiti, F. Frontera, C. Pelliciari, G. Loffredo, S.M. Nunez, V. Reglero, T. Velasco, S. Larsson, R. Svensson, A.A. Zdziarski, A. Castro-Tirado, P. Attina, M. Goria, G. Giulianelli, F. Cordero, M. Rezazad, M.N. Schmidt, R. Carli, C. Gomez, Peter Løkke Jensen, G. Sarri, A. Tiemon, A. Orr, R. Much, P. Kretschmar, H.W. Schnopper

Research output: Contribution to journalJournal articleResearchpeer-review


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 10degrees diameter.
Original languageEnglish
JournalAstronomy & Astrophysics
Issue number1
Pages (from-to)L231-L238
Publication statusPublished - 2003


  • instrumentation : detectors
  • X-rays : general


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