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We describe photometric recalibration of data obtained by the asteroid survey LINEAR. Although LINEAR was designed for astrometric discovery of moving objects, the dataset described here contains over 5 billion photometric measurements for…

Astrophysics of Galaxies · Physics 2015-05-30 Branimir Sesar , J. Scott Stuart , Željko Ivezić , Dylan P. Morgan , Andrew C. Becker , Przemysław Woźniak

Continuing previous work on the identification and characterization of periodic and non-periodic variations in long and almost uninterrupted high cadence light curves of cataclysmic variables observed by the TESS mission, the results on 23…

Solar and Stellar Astrophysics · Physics 2023-08-31 Albert Bruch

We have searched for variable stars in deep V-band images of a field towards the Galactic plane in Carina. The images were taken with VIMOS instrument at ESO VLT during 4 contiguous nights in April 2005. We detected 348 variables among…

Solar and Stellar Astrophysics · Physics 2015-05-13 P. Pietrukowicz , D. Minniti , J. M. Fernandez , G. Pietrzynski , M. T. Ruiz , W. Gieren , R. F. Diaz , M. Zoccali , M. Hempel

Variability in Young Stellar Objects (YSOs) is one of their primary characteristics. Long-term, multi-filter, high-cadence monitoring of large YSO samples is the key to understand the partly unusual light-curves that many of these objects…

Recent wide-field photometric surveys which target a specific field for long durations are ideal for studying both long and short period stellar variability. Here we report on 75 variable stars detected during observations of a field in…

The scope of the project "A PSF-based Approach to TESS High Quality data Of Stellar clusters" (PATHOS) is the extraction and analysis of high-precision light curves of stars in stellar clusters and young associations for the identification…

Earth and Planetary Astrophysics · Physics 2020-06-10 D. Nardiello , G. Piotto , M. Deleuil , L. Malavolta , M. Montalto , L. R. Bedin , L. Borsato , V. Granata , M. Libralato , E. E. Manthopoulou

We present $V$-band light curves of 61 variables from the core of the globular cluster M5 obtained using a newly developed image subtraction method (ISM). Four of these variables were previously unknown. Only 26 variables were found in the…

Astrophysics · Physics 2009-10-31 A. Olech , P. R. Wozniak , C. Alard , J. Kaluzny , I. B. Thompson

We report the discovery of three new variable stars in Indus: USNO-B1.0 0311-0760061, USNO-B1.0 0309-0771315, and USNO-B1.0 0315-0775167. Light curves of 3712 stars in a 87' x 58' field centered on the asynchronous polar CD Ind were…

Solar and Stellar Astrophysics · Physics 2009-10-02 Alex Golovin , Kirill Sokolovsky , Natalia Virnina , Javier Lopez Santiago

Variability Search Toolkit (VaST) is a software package designed to find variable objects in a series of sky images. It can be run from a script or interactively using its graphical interface. VaST relies on source list matching as opposed…

Instrumentation and Methods for Astrophysics · Physics 2017-12-19 Kirill V. Sokolovsky , Alexandr A. Lebedev

The All-Sky Automated Survey for Supernovae (ASAS-SN) is the first optical survey to routinely monitor the whole sky with a cadence of $\sim2-3$ days down to V$\lesssim17$ mag. ASAS-SN has monitored the whole sky since 2014, collecting…

The NASA Transiting Exoplanet Survey Satellite (TESS) is observing tens of millions of stars with time spans ranging from $\sim$ 27 days to about 1 year of continuous observations. This vast amount of data contains a wealth of information…

Based on over 5400 BV images of 47 Tuc collected between 1998 and 2010 we obtained light curves of 65 variables, 21 of which are newly detected objects. New variables are located mostly just outside of the core in a region poorly studied by…

Solar and Stellar Astrophysics · Physics 2014-05-26 J. Kaluzny , M. Rozyczka , W. Pych , W. Krzeminski , K. Zloczewski , W. Narloch

We present a comprehensive re-analysis of stellar photometric variability in the field of the open cluster M37 following the application of a new photometry and de-trending method to MMT/Megacam image archive. This new analysis allows a…

Solar and Stellar Astrophysics · Physics 2015-05-19 S. -W. Chang , Y. -I. Byun , J. D. Hartman

The Transiting Exoplanet Survey Satellite (TESS) mission measured light from stars in ~75% of the sky throughout its two year primary mission, resulting in millions of TESS 30-minute cadence light curves to analyze in the search for…

Blazars are characterized by largely aperiodic variability on timescales ranging from minutes to decades across the electromagnetic spectrum. The TESS (Transiting Exoplanet Survey Satellite) mission provides continuous sampling of blazar…

High Energy Astrophysical Phenomena · Physics 2024-03-25 Ethan Poore , Michael Carini , Ryne Dingler , Ann E. Wehrle , Paul J. Wiita

Visual classification of the variability classes of over 120,000 Kepler, K2 and TESS stars is presented. The sample is mainly based on stars with known spectral types. Since variability classification often requires the location of the star…

Solar and Stellar Astrophysics · Physics 2023-08-16 Luis A. Balona

Dome C in Antarctica is a promising site for photometric observations thanks to the continuous night during the Antarctic winter and favorable weather conditions. We developed instruments to assess the quality of this site for photometry in…

Precise measurements of stellar parameters are required in order to develop our theoretical understanding of stellar structure. These measurements enable errors and uncertainties to be quantified in theoretical models and constrain the…

Solar and Stellar Astrophysics · Physics 2023-03-01 Z. Jennings , J. Southworth , P. F. L. Maxted , L. Mancini