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In this paper, we study stellar light curves from the TESS satellite (Transiting Exoplanet Survey Satellite) for the presence of stellar flares. The main aim is to detect stellar flares using two-minutes cadence data and to perform…

Solar and Stellar Astrophysics · Physics 2022-08-31 Małgorzata Pietras , Robert Falewicz , Marek Siarkowski , Kamil Bicz , Paweł Preś

The CoRoT field LRa02 has been observed with the Berlin Exoplanet Search Telescope II (BEST II) during the southern summer 2007/2008. A first analysis of stellar variability led to the publication of 345 newly discovered variable stars.…

Instrumentation and Methods for Astrophysics · Physics 2012-05-11 T. Fruth , P. Kabath , J. Cabrera , R. Chini , Sz. Csizmadia , P. Eigmüller , A. Erikson , S. Kirste , R. Lemke , M. Murphy , T. Pasternacki , H. Rauer , R. Titz-Weider

We report the detection of 1143 variable stars towards the Galactic bulge, including 320 previously uncatalogued variables, using time-series photometry extracted from data obtained with the VIMOS imager at the Very Large Telescope.…

Solar and Stellar Astrophysics · Physics 2018-10-31 N. Kains , A. Calamida , M. Rejkuba , A. Bhardwaj , L. Inno , K. C. Sahu , M. Zoccali , G. Bono , F. Surot , J. Anderson , S. Casertano

Over the last two decades, asteroseismology has increasingly proven to be the observational tool of choice for the study of stellar physics, aided by the high quality of data available from space-based missions such as CoRoT, Kepler, K2 and…

We report the results of our search for pulsating subdwarf B stars in Full Frame Images, sampled at 30 min cadence and collected during Year 1 of the TESS mission. Year 1 covers most of the southern ecliptic hemisphere. The sample of…

Solar and Stellar Astrophysics · Physics 2020-11-09 S. K. Sahoo , A. S. Baran , S. Sanjayan , J. Ostrowski

The COROT space mission will monitor several target fields for up to 150 days to perform asteroseismology and to search for extrasolar planets by photometric transits. Variable stars in the target fields are important objects for additional…

Solar and Stellar Astrophysics · Physics 2009-09-29 C. Karoff , H. Rauer , A. Erikson , H. Voss , P. Kabath , T. Wiese , M. Deleuil , C. Moutou , J. C. Meunier , H. Deeg

We have used deep V-band and JHKs-band observations to investigate variability and stellar populations near the Galactic plane in Centaurus, and compared the observations with the Galactic model of Besancon. By applying image subtraction…

Astrophysics of Galaxies · Physics 2016-10-12 P. Pietrukowicz , D. Minniti , J. Alonso-Garcia , M. Hempel

Periodic variables are always of great scientific interest in astrophysics. Thanks to the rapid advancement of modern large-scale time-domain surveys, the number of reported variable stars has experienced substantial growth for several…

High-resolution spectroscopic measurements of OB stars are important for understanding processes like stellar evolution, but require labor-intensive observations. In contrast, photometric missions like the Transiting Exoplanet Survey…

Solar and Stellar Astrophysics · Physics 2025-12-16 Rachel C. Zhang , Kaze W. K. Wong , Gonzalo Holgado , Matteo Cantiello

The influence of new techniques on the discovery and characterization of pulsating variables has been enormous. In this paper, I will review the methods and results of a number of research programmes which have dramatically altered our…

Astrophysics · Physics 2007-05-23 D. L. Welch

This work presents the charge-coupled device (CCD) photometric survey of the old open cluster NGC 188. Time-series V-band photometric observations were conducted for ten nights in January 2017 using the Nanshan One-meter Wide-field…

Solar and Stellar Astrophysics · Physics 2023-08-16 Fang-Fang Song , Hu-Biao Niu , Ali Esamdin , Yu Zhang , Xiang-Yun Zeng

Intensive monitoring of low-extinction windows towards the galactic bulge has provided in the last years valuable information for studies about the dynamics, kinematics and formation history of this part of the galaxy, mainly by…

The Dark Energy Camera (DECam) is a sensitive, wide field instrument mounted at the prime focus of the 4 m V. Blanco Telescope in Chile. Beside its main objectives, i.e. understanding the growth and evolution of structures in the Universe,…

Solar and Stellar Astrophysics · Physics 2023-04-18 A. Franco , A. A. Nucita , F. De Paolis , F. Strafella , S. Sacquegna

This study aims to assess the properties and classification of 62 variable stars in Cygnus, little studied since their discovery and originally reported in the Information Bulletin on Variable Stars (IBVS) 1302. Using data from previous…

Solar and Stellar Astrophysics · Physics 2021-01-19 P. La Rocca , M. Bonasia , P. Moreo , C. Zamariola , C. Benna , D. Gardiol , G. Pettiti

We aim to detect and characterise solar-like oscillations in bright naked-eye (V<6) main-sequence (MS) and subgiant stars observed by TESS. We seek to expand the current benchmark sample of oscillators, provide accurate global asteroseismic…

Over the past few years, wide-field time-domain surveys like ZTF and OGLE have led to discoveries of various types of interesting short-period stellar variables, such as ultracompact eclipsing binary white dwarfs, rapidly rotating…

The Princeton Variability Survey (PVS) is a robotic survey which makes use of readily available, ``off-the-shelf'' type hardware products, in conjunction with a powerful set of commercial software products, in order to monitor and discover…

Astrophysics · Physics 2009-11-07 Cullen Blake

The variable stars in the VSX catalog are derived from a multitude of inhomogeneous data sources and classification tools. This inhomogeneity complicates our understanding of variable star types, statistics, and properties, and it directly…

This work presents the first large-scale photometric variability survey of the intermediate age (~200 Myr) open cluster M11. Thirteen nights of data over two observing seasons were analyzed (using crowded field and ensemble photometry…

Astrophysics · Physics 2008-11-26 Jonathan R. Hargis , Eric L. Sandquist , David H. Bradstreet

Photometric missions such as Kepler and TESS have generated millions of light curves covering almost the entire sky, offering unprecedented opportunities to study stellar variability and advance our understanding of the Universe. In this…

Instrumentation and Methods for Astrophysics · Physics 2026-04-10 Paul F. X. Gregory , Jeroen Audenaert , Mykyta Kliapets , Daniel Muthukrishna , Andrew Tkachenko , Marek Skarka , Marc Hon , George R. Ricker
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