Missing Baryons: Finding Low-Mass Galaxy Groups

 Looking for the Accretion Shock around the Perseus Cluster

 Anomalous X-ray Dispersion by Dust in the Interstellar Medium

 High Resolution X-ray Spectroscopy of Gamma Ray Burst Afterglows

 High Resolution X-ray Spectroscopy of the Nearby Starburst Galaxy NGC253

 X-ray Emission from the Warm-Hot Intergalactic Medium at Small Redshift

 ? Angular Diameter distances from GRB Ly alpha light echos? 

? Fluorescence/Compton Scattering in Sgr B2

 Direct Constraint on the Local Discrete X-ray Line Emission from Groups and Clusters