The Swift X-ray Telescope Cluster Survey III: Cluster Catalog from 2005-2012 Archival Data
Teng Liu, Paolo Tozzi, Elena Tundo, Alberto Moretti, Piero Rosati,, Jun-Xian Wang, Gianpiero Tagliaferri, Sergio Campana, Mauro Giavalisco

TL;DR
This paper presents an extensive catalog of galaxy clusters identified from Swift X-ray data between 2005 and 2012, including new detections and cross-matched known clusters, enabling future cosmological research.
Contribution
The study introduces a new, large X-ray galaxy cluster catalog from archival Swift data, with improved detection methods and comprehensive cross-matching, expanding previous surveys.
Findings
Catalog includes 263 galaxy cluster candidates.
126 are newly detected clusters.
Redshift information available for 60% of sources.
Abstract
We present the Swift X-ray Cluster Survey (SWXCS) catalog obtained using archival data from the X-ray telescope (XRT) on board the Swift satellite acquired from 2005 to 2012, extending the first release of the SWXCS. The catalog provides positions, soft fluxes, and, when possible, optical counterparts for a flux-limited sample of X-ray group and cluster candidates. We consider the fields with Galactic latitude |b| > 20 degree to avoid high HI column densities. We discard all of the observations targeted at groups or clusters of galaxies, as well as particular extragalactic fields not suitable to search for faint extended sources. We finally select ~3000 useful fields covering a total solid angle of ~400 degree^2. We identify extended source candidates in the soft-band (0.5-2keV) images of these fields using the software EXSdetect, which is specifically calibrated for the XRT data.…
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