41,700 research outputs found
rodluger/starry: v1.2.0
No full textWhat's Changed
Implements the Doppler imaging model described in https://github.com/rodluger/paparazzi
Implements transits across oblate stars by @rodluger and @shashankdholakia in https://github.com/rodluger/starry/pull/289
Minor bugfixes
Full Changelog: https://github.com/rodluger/starry/compare/v1.1.2...v1.2.
rodluger/starry: v1.1.2
No full textFixes issue with the nexsci extension, which previously checked for new planet data on import. Changes to the online database were causing starry to crash when imported. This patch fixes the issue and delays nexsci database checks to the first call of the from_nexsci method (instead of on import)
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The David W. Fentress Family Letters, 1856-1969
No full textTranscript of a letter by an unidentified author to David Fentress regarding sharing federal newspapers and the banning of federal newspapers in some areas. The author passes on the news of the war including the destruction of the Federal merchantmen by the Confederate fleet. He passes along world news: Russia preparing to go to War with Europe and how that could negatively affect the Confederacy. There is also speculation on the future of the war
The David W. Fentress Family Letters, 1856-1969
No full textTranscript of a letter by an unidentified author to David Fentress regarding sharing federal newspapers and the banning of federal newspapers in some areas. The author passes on the news of the war including the destruction of the Federal merchantmen by the Confederate fleet. He passes along world news: Russia preparing to go to War with Europe and how that could negatively affect the Confederacy. There is also speculation on the future of the war
STARRY: Analytic Occultation Light Curves
No full textWe derive analytic, closed form, numerically stable solutions for the total flux received from a spherical planet, moon or star during an occultation if the specific intensity map of the body is expressed as a sum of spherical harmonics. Our expressions are valid to arbitrary degree and may be computed recursively for speed. The formalism we develop here applies to the computation of stellar transit light curves, planetary secondary eclipse light curves, and planet-planet/planet-moon occultation light curves, as well as thermal (rotational) phase curves. In this paper we also introduce STARRY, an open-source package written in C++ and wrapped in Python that computes these light curves. The algorithm in STARRY is six orders of magnitude faster than direct numerical integration and several orders of magnitude more precise. STARRY also computes analytic derivatives of the light curves with respect to all input parameters for use in gradient-based optimization and inference, such as Hamiltonian Monte Carlo (HMC), allowing users to quickly and efficiently fit observed light curves to infer properties of a celestial body's surface map
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