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The Chandra Source Catalog version 2.1: New Avenues for Discovery in X-ray Datasets

Presentation #404.01 in the session The Chandra Source Catalog version 2.1: New Avenues for Discovery in X-ray Datasets.

Published onJul 01, 2023
The Chandra Source Catalog version 2.1: New Avenues for Discovery in X-ray Datasets

We present the Chandra Source Catalog version 2.1 (CSC 2.1), which adds observations released publicly between January 1, 2015 and the end of 2021. Besides adding 7 years of data, CSC 2.1 ties the catalog to the Gaia astrometric reference frame and includes new algorithms that improve X-ray source position determination and aperture photometry. Compared to CSC 2.0, this new version increases the number of sources in the catalog by about one-third, augmenting the total number of observations included from 10,382 to more than 15,000 and the number of observation stacks from 7,287 to about 10,000. A significant fraction of the new observations added represent new sky coverage since CSC 2.0. The total sky coverage of CSC 2.1 is roughly 800 square degrees, compared to ~560 square degrees in CSC 2.0. In preparation for the science talks, in this presentation we introduce users to the catalog updates and provide an overview of the different interfaces -including python-based Virtual Observatory tools- that can be used to access the rich catalog dataset, including tabulated properties and data products such as light curves, spectra, background maps, among many others. User-friendly Jupyter notebooks will be provided for seamless interaction with our database.

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