091439

We propose a joint 100 ks Chandra and 30 ks XMM-Newton study of the low-metallicity galaxy NGC3109. By combining unprecedented spatial resolution of Chandra with the soft XMM-Newton response we will obtain a census of X-ray binaries probe the nature of accreting sources and find hot bubbles in this template low-metallicity galaxy. New Chandra observations will complement the HST observations of massive stars in NGC3109. Obtaining first robust measurements of X-ray sources in NGC3109 is a necessary next step to progress in our understanding of massive binary star evolution and feedback at low-metallicities and by proxy in early cosmic times. [truncated! Please see actual data for full text]