The SXG is an international collaborative mission between Russia, various international partners in Europe and NASA. The spacecraft and launch vehicle will be provided by IKI of Russia. The mission will carry two U.S. nstruments: a Stellari X-Ray Polarimeter (SXRP) focal plane instrument and a wide field Monitoring X-Ray Experiment (MOXE).

SXRP objective is to perform x-ray polarization measurements addressing a number of astrophysical problems including X-ray pulsars, black holes, accretion disk scattering, radio pulsars, supernova remnants and active GALACTIC NUCLEI. The SXRP energy band is from 2.6 KeV to 12 KeV.

MOXE objective is two fold: First, to alert observers on Spectrum-X-Gamma and other platforms of interesting
transient x-ray events. Second, to synoptically monitor the X-ray sky and study long-term changes in X-ray binaries and other compact objects. MOXE will be sensitive to sources as faint as 2 millicrab and will cover the wavelength range from 2-12 KeV.

Salient Features:

Project Start: 1989
Spacecraft Weight: 5700 kg
Planned Lifetime: 3 years
Orbit: 500 Km X 200,000 Km, 51.50 inclination
Launch: Proton from Baikanur, Russia, TBD

Instrument Complement:

Jet-X (UNITED KINGDOM)
Euvita (SWITZERLAND)
Six-A (FINLAND)
MOXE (NASA/LANL)
HEPC/LEPC
TAUVEX (ISRAEL)
SXRP (NASA/CU)
MART (ITALY)
KFRD (RUSSIA)
RIUS (HUNGARY)
DSI (DENMARK)