A wide Chandra view of the core of the Perseus cluster
  We present new Chandra images of the X-ray emission from the core of the
Perseus cluster of galaxies. The total observation time is now 1.4 Ms. New
depressions in X-ray surface brightness are discovered to the north of NGC1275,
which we interpret as old rising bubbles. They imply that bubbles are
long-lived and do not readily breakup when rising in the hot cluster
atmosphere. The existence of a 300 kpc long NNW-SSW bubble axis means there
cannot be significant transverse large scale flows exceeding 100 km/s.
Interesting spatial correlations are seen along that axis in early deep radio
maps. A semi-circular cold front about 100 kpc west of the nucleus is seen. It
separates an inner disturbed region dominated by the activity of the active
nucleus of NGC1275 from the outer region where a subcluster merger dominates.
