# An extension of the Planck galaxy cluster catalogue

## TL;DR

This paper extends the Planck galaxy cluster catalogue by identifying about 3000 clusters using combined Planck, WISE, and SDSS data, significantly increasing known clusters at higher redshifts for future surveys.

## Contribution

It provides an expanded galaxy cluster catalogue with improved completeness and higher redshift coverage, aiding future large-scale structure studies.

## Key findings

- Approximately 3000 clusters identified in SDSS fields.
- Catalogue is highly complete for clusters with M_500 > 3x10^14 Msun.
- Contains about ten times more clusters than previous Planck SZ catalogues at z>0.4.

## Abstract

We present a catalogue of galaxy clusters detected in the Planck all-sky Compton parameter maps and identified using data from the WISE and SDSS surveys. The catalogue comprises about 3000 clusters in the SDSS fields. We expect the completeness of this catalogue to be high for clusters with masses larger than M_500 =~ 3x10^14 Msun, located at redshifts z<0.7. At redshifts above z=~0.4, the catalogue contains approximately an order of magnitude more clusters than the 2nd Planck Catalogue of Sunyaev-Zeldovich sources in the same fields of the sky. This catalogue can be used for identification of massive galaxy clusters in future large cluster surveys, such as the SRG/eROSITA all-sky X-ray survey.