All Tables

• Table 1: The coordinates, redshifts and Galactic neutral hydrogen columns of the sources.
• Table 2: Observation dates, X-ray instrument modes and exposure times for the BL Lac observations reported here.
• Table 3: Fit parameters for powerlaw and neutral absorption, and broken power-law with neutral absorption, fits to the EPIC-pn (0.4-10 keV) and RGS (0.35-2.5 keV) spectra of the BL Lacs objects observed. The 2-10 keV flux is given for the preferred model for each object.
• Table 4: The history of the 2-10 keV fluxes of 1H1219+301, H1426+428, Markarian 501 and PKS 0548-322 as observed by past X-ray missions.