Three new hard X-ray sources in the Cassiopeia/Perseus region discovered by INTEGRAL

In an ultra-deep INTEGRAL exposure (4.1 Ms) on the Cassiopeia region, resulting from the combination of observations performed between December 12, 2003 and January 10, 2006 (INTEGRAL revolutions 142-396), two new hard X-ray sources have been detected: IGR J00335+6126 and IGR J00254+6822. A deep 1.9 Ms INTEGRAL mosaic centered on gamma-ray binary LS I+61 303 using observations performed between March 3, 2003 and July 4, 2006 (INTEGRAL revolutions 47 and 454) revealed the presence of a previously unknown hard X-ray source, IGR J02501+5440.