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The NASA $Kepler$ mission obtained long-term high-quality photometric observations for a large number of stars in its original field of view from 2009 to 2013. In order to provide reliable stellar parameters in a homogeneous way, the LAMOST…

Solar and Stellar Astrophysics · Physics 2020-11-11 J. N. Fu , P. De Cat , W. Zong , A. Frasca , R. O. Gray , A. B. Ren , J. Molenda-Żakowicz , C. J. Corbally , G. Catanzaro , J. R. Shi , A. L. Luo , H. T. Zhang

We present the Transiting Exoearth Robust Reduction Algorithm (TERRA) --- a novel framework for identifying and removing instrumental noise in Kepler photometry. We identify instrumental noise modes by finding common trends in a large…

Instrumentation and Methods for Astrophysics · Physics 2015-06-11 Erik A. Petigura , Geoffrey W. Marcy

High-precision and high-cadence photometric surveys such as Kepler or TESS are making huge progress not only in the detection of new extrasolar planets but also in the study of a great number of variable stars. This is the case for central…

Solar and Stellar Astrophysics · Physics 2024-09-11 Alba Aller , Jorge Lillo-Box , David Jones

Light echoes of flares on active stars offer the opportunity for direct detection of circumstellar dust. We revisit the problem of identifying faint echoes in post-flare light curves, focusing on debris disks from on-going planet formation.…

Earth and Planetary Astrophysics · Physics 2021-08-18 Benjamin C. Bromley , Austin Leonard , Amanda Quintanilla , Austin J. King , Chris Mann , Scott J. Kenyon

We present stellar parameter estimates for 939,457 southern FGK stars that are candidate targets for the TESS mission. Using a data-driven method similar to the CANNON, we build a model of stellar colours as a function of stellar…

Solar and Stellar Astrophysics · Physics 2019-03-27 N. R. Deacon , Th. Henning , D. E. Kossakowski

We present the results of a search for Galactic Beta Cephei stars, which are massive pulsating stars with both pressure modes and mixed modes. Thus, these stars can serve as benchmarks for seismological studies of the interiors of massive…

Gaia will obtain astrometry and spectrophotometry for essentially all sources in the sky down to a broad band magnitude limit of G=20, an expected yield of 10^9 stars. Its main scientific objective is to reveal the formation and evolution…

Instrumentation and Methods for Astrophysics · Physics 2015-06-05 C. Liu , C. A. L. Bailer-Jones , R. Sordo , A. Vallenari , R. Borrachero , X. Luri , P. Sartoretti

We present the TESS light curve of GRB 230307A. We find two distinct components: a bright, prompt optical component at the time of the Fermi observation that peaked at TESS magnitude 14.49 (averaged over 200 seconds), followed by a gradual…

Gravitationally lensed quasars offer a unique opportunity to study cosmological and extragalactic phenomena, using reliable light curves of the lensed images. This requires accurate deblending of the quasar images, which is not trivial due…

Instrumentation and Methods for Astrophysics · Physics 2025-04-24 Favio Neira , Frédéric Courbin , Frédéric Dux , Georgios Vernardos

The detection of planetary transits in stellar photometric light-curves is poised to become the main method for finding substantial numbers of terrestrial planets. The French-European mission COROT (foreseen for launch in 2005) will perform…

Astrophysics · Physics 2009-11-07 S. Aigrain , F. Favata

Using an unprecedented cadence of 30 minutes provided by the Transiting Exoplanet Survey Satellite (TESS), we have examined the optical light curves (LCs) of the blazar S5 0716+714 obtained from its Sectors 40, 47, and 53 over a period of…

High Energy Astrophysical Phenomena · Physics 2026-03-09 Shubham Kishore , Alok C. Gupta , Paul J. Wiita

Stellar light curves are well known to encode physical stellar properties. Precise, automated and computationally inexpensive methods to derive physical parameters from light curves are needed to cope with the large influx of these data…

Solar and Stellar Astrophysics · Physics 2021-03-17 Maryum Sayeed , Daniel Huber , Adam Wheeler , Melissa Ness

GASPS is a far-infrared line and continuum survey of protoplanetary and young debris disks using PACS on the Herschel Space Observatory. The survey includes [OI] at 63 microns, as well as 70, 100 and 160um continuum, with the brightest…

The Kilodegree Extremely Little Telescope (KELT) project is a small aperture, wide-angle search for planetary transits of solar-type stars. In this paper, we present the results of a commissioning campaign with the KELT telescope to observe…

The TESS light curve of the silicon Ap star MX TrA was modelled using the observational surface distribution of silicon, iron, helium, and chromium obtained previously with the Doppler Imaging technique. The theoretical light curve was…

Solar and Stellar Astrophysics · Physics 2024-09-05 Yu. Pakhomov , I. Potravnov , A. Romanovskaya , T. Ryabchikova

Although the James Webb Space Telescope (JWST) has received much attention for its ability to search deeper into the cosmos than ever before, it also enhances our capability to study objects closer to us in the Universe. We apply a…

We study the photometric behavior of the recurrent nova RS Oph by 58 monitoring light curves (LCs), taken by 5 telescopes. All LCs show repeating time structures with some quasi-periods (QPs) in time scales from minutes to hours. In our…

Solar and Stellar Astrophysics · Physics 2020-01-31 Ts. B. Georgiev , R. K. Zamanov , S. Boeva , G. Y. Latev , B. Spassov , J. Marti , G. Nikolov , S. Ibryamov , S. V. Tsvetkova , K. A. Stoyanov

We present GaiaHub, a publicly available tool that combines $Gaia$ measurements with $Hubble$ $Space$ $Telescope$ ($HST$) archival images to derive proper motions (PMs). It increases the scientific impact of both observatories beyond their…

Deep learning techniques have been well explored in the transiting exoplanet field; however, previous work mainly focuses on classification and inspection. In this work, we develop a novel detection algorithm based on a well proven object…

Earth and Planetary Astrophysics · Physics 2022-01-05 Kaiming Cui , Junjie Liu , Fabo Feng , Jifeng Liu
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