The Chandra Source Catalog Release 2 Series
Ian N. Evans (1), Janet D. Evans (1), J. Rafael Mart\'inez-Galarza, (1), Joseph B. Miller (1), Francis A. Primini (1), Mojegan Azadi (1), Douglas, J. Burke (1), Francesca M. Civano (1), Raffaele D'Abrusco (1), Giuseppina, Fabbiano (1), Dale E. Graessle (1), John D. Grier (1)

TL;DR
The Chandra Source Catalog Release 2 Series provides a comprehensive, uniformly calibrated database of over 400,000 X-ray sources with improved sensitivity, algorithms, and data products for astrophysical research.
Contribution
This paper introduces the CSC Release 2 Series, including new algorithms, expanded data, and enhanced source detection and photometry methods, significantly advancing X-ray source cataloging.
Findings
Increased source count to 407,806 sources.
Sensitivity limit improved to ~5 photons, twice as faint as previous release.
Enhanced algorithms for source detection and flux estimation.
Abstract
The Chandra Source Catalog (CSC) is a virtual X-ray astrophysics facility that enables both detailed individual source studies and statistical studies of large samples of X-ray sources detected in ACIS and HRC-I imaging observations obtained by the Chandra X-ray Observatory. The catalog provides carefully-curated, high-quality, and uniformly calibrated and analyzed tabulated positional, spatial, photometric, spectral, and temporal source properties, as well as science-ready X-ray data products. The latter includes multiple types of source- and field-based FITS format products that can be used as a basis for further research, significantly simplifying followup analysis of scientifically meaningful source samples. We discuss in detail the algorithms used for the CSC Release 2 Series, including CSC 2.0, which includes 317,167 unique X-ray sources on the sky identified in observations…
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Taxonomy
TopicsAstronomical Observations and Instrumentation · Astronomy and Astrophysical Research · Calibration and Measurement Techniques
