PSZSPT, joint Planck and SPT-SZ cluster catalog

We develop and apply a Matched Multi-Filter (MMF) capable of dealing with the different transfer functions and resolutions of the two datasets. We verified that it produces results consistent with publications from Planck and SPT collaborations when applied on the datasets individually.

We also verified that Planck and SPT-SZ cluster fluxes are consistent with each other. When applied blindly to the combined dataset, the MMF generated a catalogue of 419 detections (S/N>5), of which 323 are already part of the SPT-SZ or PSZ2 catalogues; 54 are new SZ detections, identified in other catalogues or surveys; and 42 are new unidentified candidates. The MMF takes advantage of the complementarity of the two datasets, Planck being particularly useful for detecting clusters at low redshift (z<0.3) while SPT is efficient at finding higher redshift (z>0.3) sources.