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The Pan-STARRS 3$\pi$ survey has detected hundreds of thousands of variable stars thanks to its coverage and 4-year time span, even though the sampling of the light curves is relatively sparse. These light curves contain only 10-15…

Solar and Stellar Astrophysics · Physics 2024-08-27 Adrienn Forró , László Molnár , Emese Plachy , Áron Juhász , Róbert Szabó

This paper contains the fifth part of the Catalog of Variable Stars created from the V-band photometric data collected by 9x9 deg camera of the All Sky Automated Survey. Preliminary list of variable stars found in the fields located between…

Astrophysics · Physics 2007-05-23 G. Pojmanski , B. Pilecki , D. Szczygiel

Approximately four thousand light curves of red variable stars in the LMC were selected from the 2.3-years duration MOA database by a period analysis using the Phase Dispersion Minimization method. Their optical features (amplitudes,…

Astrophysics · Physics 2016-01-27 Sachiyo Noda , Mine Takeuti

We search a sample of 5,685,060 isolated sources in the All Sky Automated Survey for SuperNovae (ASAS-SN) with 14.5<g<15 mag for slowly varying sources with brightness changes larger than ~0.03 mag/year over 10 years. We find 426…

Solar and Stellar Astrophysics · Physics 2025-11-06 Sydney Petz , C. S. Kochanek , K. Z. Stanek , Benjamin J. Shappee , Subo Dong , J. L. Prieto , Todd A. Thompson

In this paper, we report the detections of stellar variabilities from the first 2-year observations of sky area of about 1300 square degrees from the Tsinghua University-NAOC Transient Survey (TNTS). A total of 1237 variable stars…

Solar and Stellar Astrophysics · Physics 2015-09-23 Xinyu Yao , Lingzhi Wang , Xiaofeng Wang , Tianmeng Zhang , Juncheng Chen , Wenlong Yuan , Jun Mo , Wenxiong Li , Zhiping Jin , Xuefeng Wu , JunDan Nie , Xu Zhou

We accurately identify and classify the variability of A-F stars in the southern continuous viewing zone of the TESS satellite. The brightness limit was set to 10 mag to ensure the utmost reliability of our results and allow for…

Solar and Stellar Astrophysics · Physics 2024-08-06 M. Skarka , Z. Henzl

Variable stars with well-calibrated period-luminosity relationships provide accurate distance measurements to nearby galaxies and are therefore a vital tool for cosmology and astrophysics. While these measurements typically rely on samples…

Instrumentation and Methods for Astrophysics · Physics 2019-04-09 Markus Michael Rau , Sergey E. Koposov , Hy Trac , Rachel Mandelbaum

Stellar photometric variability offers a novel probe of the interior structure and evolutionary state of stars. Here we present a census of stellar variability on day to decade timescales across the color-magnitude diagram for 73,000 stars…

In area and depth, the Pan-STARRS1 (PS1) 3$\pi$ survey is unique among many-epoch, multi-band surveys and has enormous potential for all-sky identification of variable sources. PS1 has observed the sky typically seven times in each of its…

With the advent of digital astronomy, new benefits and new problems have been presented to the modern day astronomer. While data can be captured in a more efficient and accurate manor using digital means, the efficiency of data retrieval…

Instrumentation and Methods for Astrophysics · Physics 2020-01-03 Kyle B Johnston , Hakeem M Oluseyi

A sample of 123 radio sources that exhibit significant variations at 1.4 GHz on a seven year base-line has been created using FIRST VLA B-array data from 1995 and 2002 on a strip at dec=0 near the south Galactic cap. This sample spans the…

Astrophysics · Physics 2009-11-10 W. H. de Vries , R. H. Becker , R. L. White , D. J. Helfand

We present an automated classification of stars exhibiting periodic, non-periodic and irregular light variations. The Hipparcos catalogue of unsolved variables is employed to complement the training set of periodic variables of Dubath et…

We have monitored a 3 deg2 area toward Serpens Main in the Pan-STARRS1 r, i, and z bands from 2016 April to September. Light curves of more than 11,000 stars in each band were obtained, and 143 variables have been identified. Among those,…

Solar and Stellar Astrophysics · Physics 2021-07-14 Jia Yin , Zhiwei Chen , Rolf Chini , Martin Haas , Sadegh Noroozi , Yongqiang Yao , Zhibo Jiang , Xuan Qian , Liyong Liu , Yao Li

We have searched the K2 campaign 0 data for lightcurve variations associated with stellar variability. The results of this search are presented as a catalogue, giving the identifiers of nearly 2500 variable stars in the dataset. We list the…

Solar and Stellar Astrophysics · Physics 2015-01-09 D. J. Armstrong , H. P. Osborn , D. J. A. Brown , J. Kirk , K. W. F. Lam , D. L. Pollacco , J. Spake , S. R. Walker

A photometric survey of three Southern target fields with BEST II yielded the detection of 2,406 previously unknown variable stars and an additional 617 stars with suspected variability. This study presents a catalog including their…

AST3-1 is the second-generation wide-field optical photometric telescope dedicated to time domain astronomy at Dome A, Antarctica. Here we present the results of $i$ band images survey from AST3-1 towards one Galactic disk field. Based on…

We present VIVACE, the VIrac VAriable Classification Ensemble, a catalogue of variable stars extracted from an automated classification pipeline for the Vista Variables in the V\'ia L\'actea (VVV) infrared survey of the Galactic bar/bulge…

Solar and Stellar Astrophysics · Physics 2022-03-18 Thomas A. Molnar , Jason L. Sanders , Leigh C. Smith , Vasily Belokurov , Philip Lucas , Dante Minniti

We present optical lightcurves of 428 periodic variable stars coincident with ROSAT X-ray sources, detected using the first run of the SuperWASP photometric survey. Only 68 of these were previously recognised as periodic variables. A…

A common remark at conferences and meetings has been: "One can fit any light curve with binary lens models because of the large number of parameters!" It is especially tempting to claim that some of the possible binary events in the…

Astrophysics · Physics 2009-10-28 Ann B. Saust