Entropy scaling in galaxy clusters: Insights from an XMM-Newton observation of the poor cluster A1983

Improved data analysis of far infrared imaging data of the globular cluster NGC 7078 obtained with the ISO instrument ISOPHOT at 60 (mu)m, 70 (mu)m and 90 (mu)m has detected the thermal emission from dust in its core, the first secure detection of intra-cluster dust in a globular cluster. The amount of dust is broadly consistent with mass-loss from evolved, metal-deficient stars in NGC 7078 in the time since it last crossed the Galactic plane.