CAIXA: a Catalogue of AGN In the XMM-Newton Archive II. Multiwavelength correlations

Understand

We presented CAIXA, a Catalogue of AGN in the XMM-Newton Archive, in a companion paper.

• Here, a systematic search for correlations between the X-ray spectral properties and the multiwavelength data was performed for the sources in CAIXA.
• All the significant (>99.9% confidence level) correlations are discussed along with their physical implications on current models of AGN.
• Two main correlations are discussed in this paper: a) a very strong anti-correlation between the FWHM of the H$\beta$ optical line and the ratio between the soft and the hard X-ray luminosity.