Calypso is a parameter-conditioned stochastic surrogate model for circumbinary accretion flows using PCA and multivariate Gaussian modeling, released as open-source software with a closed-form likelihood for parameter inference from time series.
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Continuous spin gravity yields GW time-delay deviations of order ρ_g/ω from GR predictions for frequencies above ρ_g, with damping below, enabling sensitivity to spin scales ~10^{-14} eV at ground interferometers and ~10^{-24} eV at PTAs.
X-ray pulsar navigation using NICER-derived noise and EKF achieves sub-7 km LEO and sub-20 km interplanetary position errors with the Crab pulsar at 200 cm² effective area, but diverges after 20 days without timing updates while stable pulsars support longer autonomy at reduced precision.
PCA analysis of NANOGrav data recovers known pulse shape changes tied to timing events in pulsars like J1713+0747 and identifies new candidates and a recurrence in PSR B1937+21.
citing papers explorer
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\texttt{calypso}: a Parameter-Conditioned Stochastic Surrogate Model for Circumbinary Accretion Time-Series
Calypso is a parameter-conditioned stochastic surrogate model for circumbinary accretion flows using PCA and multivariate Gaussian modeling, released as open-source software with a closed-form likelihood for parameter inference from time series.
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First look at continuous spin gravity: Time delay signatures
Continuous spin gravity yields GW time-delay deviations of order ρ_g/ω from GR predictions for frequencies above ρ_g, with damping below, enabling sensitivity to spin scales ~10^{-14} eV at ground interferometers and ~10^{-24} eV at PTAs.
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Pulsar Selection Criteria and Performance Evaluation of Autonomous X-ray Pulsar Navigation Systems
X-ray pulsar navigation using NICER-derived noise and EKF achieves sub-7 km LEO and sub-20 km interplanetary position errors with the Crab pulsar at 200 cm² effective area, but diverges after 20 days without timing updates while stable pulsars support longer autonomy at reduced precision.
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The NANOGrav 15 yr and 20 yr Datasets: Timing Events and Pulse Shape Changes
PCA analysis of NANOGrav data recovers known pulse shape changes tied to timing events in pulsars like J1713+0747 and identifies new candidates and a recurrence in PSR B1937+21.