0120039

Our observations with ROSAT ASCA RXTE Beppo-SAX and CHANDRA along with information from near-IR and Radio all suggest that the super-luminous and super-massive star eta-Carinae may be in fact a 5.52 yr period eccentric binary system. The spatial resolution of IBIS affords us to separate gamma-rays from other sources in the rich Carina field for the FIRST time ever and examine directly the heart of eta-Carinae. Gamma-ray observations of eta-Carinae will severely test the binary hypothesis for this object which predicts a DECREASED x-ray but ENHANCED gamma-ray luminosity just after the putative periastron in 2003.47 (for which we will be requesting a fixed time AO2 observation). In order to correctly interpret those data and to understand the nature of eta-Carinae in its normal state we propose an unconstrained observation in this AO. The simultaneous and cross-calibrated data from the twin JEM-Xs and IBIS will suit our science aims perfectly. The large 17degx17deg fully coded dithered IBIS field will also allow us to:1. Identify/Verify 5 EGRET sources in the extended field.IBIS2. Examine timing of the bright Anomalous X-ray Pulsar 1E1048.1-5937. JEM-X/IBIS3. Twenty Radio supernova remnants (SNRs) will be in the extended IBIS field Sixteen for JEM-Xs. Eight have no identified x-ray counter-parts. Detection of hard x-ray non-thermal emission could be made. JEM-XIBIS4. The 511 keV line may be detected and mapped cold-cloud/warm cloud shapes couldbe compared -- the 3.5 degree scale of the extended Carina cloud complex is well suited to SPIs 2.5deg resolutionSPI5. Cross-correlate our measured CO(J=4-->3) 460 GHz hot spots with hard x-ray/gamma-ray hot-spots viewed by JEM-X/IBIS/SPI.6. Off-pointed dither fields will provide information on the soft-gamma background.7. Off-pointed dither fields will probe the Carina Flare Super-shell. [truncated! Please see actual data for full text]