Title: ISM Absorption and Broad Line Emission in the Bright Z-Source GX 17+2 Object: GX 17+2 Exposure: 80 ks Lead Scientist: Norbert S. Schulz [ ] Primary or [ X ] Backup Constraints (none/easy/average) NONE [ ] TOO? Brief description: GX 17+2 is a very bright Z-source at a distance of about 7 kpc towards the center of the Galactic bulge. We observe the X-ray source to probe the hot ISM comoinent in the Galactic plane near the center of the Galactic bulge. We also seek to detect and resolve broad line emission. As previously done for Cyg X-2 we also investigate line flux and shift variability possibly in correlation with its Z-pattern.