Description
We present the results of the XMM-Newton catalogue of BL Lacs. X-ray and optical UV properties is presented based on the cross-correlation with the 1151 BL Lacs listed in the 5th edition of the Roma-BZCAT. The X-ray counterparts to these objects are searched in the field of view of all pointed observations in the XMM-Newton archive over nearly 20 years of mission. The cross-correlation yields a total of 310 XMM-Newton fields which correspond to 103 different BL Lacs. Data from the three EPIC cameras (X-ray) and OM (optical/UV) are homogeneously analysed using the XMM-Newton SAS software. Images, light curves and spectral products are produced for those BL Lacs detected in any of the three EPIC cameras. Two different phenomenological models, log parabola and power law, with different variations of the absorbing column density, are tested and their parameters extracted. Time variability information is derived from the light curves following well established statistical methods, and we quantify variability through statistical indicators. OM magnitudes and fluxes are computed when available.
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