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The neutron star mass and radius of Aql X‑1 from quiescent X‑ray emissions
Li, Z.; Luo, Y.
We report the quiescent spectra of neutron star (NS) in Aql X‑1 from XMM‑Newton and Chandra. The NS atmosphere model, NSATMOS, is applied to fit the quiescent spectra. The Monte Carlo Markov Chain algorithm is used to constrain the NS mass and radius in Aql X‑1. We find that the absolute flux calibration between XMM‑Newton and Chandra for Aql X‑1 …
Project BMK10k: Zeiss Ballistische Messkammer with a 10k × 10k CCD for ground‑based PLATO support
Chini, Rolf; Strassmeier, Klaus G.; Granzer, Thomas +5 more
Ballistische Messkammer with 10k CCD's (BMK10k) central goal is supporting the upcoming PLAnetary Transits and Oscillation of stars (PLATO) mission by reducing its number of false positives (planet‑compatible transit candidates but not planets at the end). For Kepler, the number of false positives had been estimated to still be about 10%. Understa…