Additional spectroscopic redshift measurements for galaxy clusters from the First Planck Catalogue

TL;DR

This paper reports new spectroscopic redshift measurements for galaxy clusters from the Planck SZ catalogue, improving cluster identification and redshift accuracy using multiple telescopes.

Contribution

It provides additional spectroscopic redshifts for 13 galaxy clusters, including an improved measurement for a high-redshift cluster, using data from three different telescopes.

Findings

Redshifts for 13 galaxy clusters are measured.

Improved redshift for cluster PSZ1 G141.73+14.22 at z=0.828.

Data obtained from RTT-150, Calar Alto, and BTA telescopes.

Abstract

We present the results of spectroscopic redshift measurements for the galaxy clusters from the first all-sky Planck catalogue of the Sunyaev-Zeldovich sources, that have been mostly identified by means of the optical observations performed previously by our team (Planck Collaboration, 2015a). The data on 13 galaxy clusters at redshifts from z=~0.2 to z=~0.8, including the improved identification and redshift measurement for the cluster PSZ1 G141.73+14.22 at z=0.828, are provided. The measurements were done using the data from Russian-Turkish 1.5-m telescope (RTT-150), 2.2-m Calar Alto Observatory telescope, and 6-m SAO RAS telescope (Bolshoy Teleskop Azimutalnyi, BTA).