The Scientific Role of JEM-X: the X-ray monitor on INTEGRAL

N. Lund, N.J. Westergaard, S. Brandt, A. Hornstrup, and C. Budtz-Jø rgensen


JEM-X is the X-ray monitor onboard INTEGRAL. It consists of two independent coded mask telescopes each with a 25% transparent HURA mask an a 500 cm2 detector. The primary energy band is 3 - 35 keV and it overlaps with that of the INTEGRAL imager: IBIS. The scientific program of INTEGRAL contains frequently repeated scans of the galactic plane in search for appearing or disappearing sources. Also a deep scan of the galactic center is foreseen. During this program JEM-X will detect and monitor a large number of X-ray sources in particular accreting X-ray pulsars and X-ray transients including black hole candidates. Also extra-galactic sources, in particular AGN, will be observed. JEM-X together with IBIS will determine and model the shape and variability of the X/gamma-ray spectra of various classes of sources. The long-term behavior of galactic binary sources will be studied by continuous or repeated observations. The paper discusses several expected observational results based on the JEM-X sensitivity, energy resolution, and the time resolution. In addition some typical observations during the INTEGRAL lifetime are simulated.

File translated from TEX by TTH, version 2.32.
On 16 Jul 1999, 09:19.