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SRGz: building an optical cross-match model for the X-ray SRG/eROSITA sources using the Lockman Hole dataстатья
- Авторы: Belvedersky M.I., Meshcheryakov A.V., Gilfanov M.R., Medvedev P.S.
- Журнал: Preprint Arxiv.org (Cornell University Library)
- Том: 2203
- Номер: 11531
- Год издания: 2022
- DOI: 10.1134/S1063773722020013
- Аннотация: We present a probabilistic model built for the optical cross-match between the SRG/eROSITA X-ray sources and photometric data from the DESI Legacy Imaging Surveys. The model relies both on positional and photometric information on optical objects nearby X-ray sources and allows performing selection with precision and recall ${≈}94%$ (for $F_{\textrm{X,0.5-2}}>10^{-14}$ erg s${}^{-1}$ cm${}^{-2}$). With this model, we calibrated positional error of the SRG/eROSITA sources detected in the Lockman Hole: $σ_{\textrm{corr}}=0.87\sqrt{σ_{\textrm{det}}^{2.53}+1.122}$. The model will become a part of the SRGz system for data analysis of the X-ray data obtained from the all-sky SRG/eROSITA survey.
- Добавил в систему: Казачук Мария Андреевна