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We describe a methodology to classify periodic variable stars identified using photometric time-series measurements constructed from the Wide-field Infrared Survey Explorer (WISE) full-mission single-exposure Source Databases. This will…

Instrumentation and Methods for Astrophysics · Physics 2015-06-18 Frank J. Masci , Douglas I. Hoffman , Carl J. Grillmair , Roc M. Cutri

The number of known periodic variable stars has increased rapidly in recent years. As an all-sky transit survey, the Transiting Exoplanet Survey Satellite (TESS) plays an important role in detecting low-amplitude variable stars. Using…

Solar and Stellar Astrophysics · Physics 2024-12-10 Xinyi Gao , Xiaodian Chen , Shu Wang , Jifeng Liu

The time-series component of WISE is a valuable resource for the study of variable objects. We present an analysis of an all-sky sample of ~450,000 AllWISE+NEOWISE infrared light curves of likely variables identified in AllWISE. By…

Solar and Stellar Astrophysics · Physics 2021-04-06 Evan Petrosky , Hsiang-Chih Hwang , Nadia L. Zakamska , Vedant Chandra , Matthew J. Hill

The WISE and NEOWISE missions have provided the only mid-infrared all-sky time-domain data, opening a unique observational window for variability studies. Yet, a comprehensive and systematic catalog of mid-infrared variable sources has…

Instrumentation and Methods for Astrophysics · Physics 2025-12-01 Zihan kang , Jingyi Zhang , Yanxia Zhang , Changhua Li , Xiao Kong , Minzhi Kong , Jinghang Shi , Shirui Wei , Xue-Bing Wu

The number of known periodic variables has grown rapidly in recent years. Thanks to its large field of view and faint limiting magnitude, the Zwicky Transient Facility (ZTF) offers a unique opportunity to detect variable stars in the…

Solar and Stellar Astrophysics · Physics 2020-07-29 Xiaodian Chen , Shu Wang , Licai Deng , Richard de Grijs , Ming Yang , Hao Tian

We used four-year baseline HST/WFC3 IR observations of the Galactic Centre in the F153M band (1.53 micron) to identify variable stars in the central ~2.3'x2.3' field. We classified 3845 long-term (periods from months to years) and 76…

We present a new catalogue of variable stars compiled from data taken for the University of New South Wales Extrasolar Planet Search. From 2004 October to 2007 May, 25 target fields were each observed for 1-4 months, resulting in ~87000…

The Near-Earth Object Wide-field Infrared Explorer (NEOWISE) mission provides a decade of all-sky time-series data at 3.4 and 4.6um and an unprecedented opportunity for the discovery and characterization of variable objects. This paper…

Solar and Stellar Astrophysics · Physics 2026-05-20 Matthew Paz , J. Davy Kirkpatrick , Rajiv Uttamchandani , Troy Raen , Roc M. Cutri

We have conducted a deep photometric survey of a 0.5 deg x 0.5 deg area of the Galactic Plane using the WFI instrument on the 2.2-m ESO telescope on La Silla, Chile. The dataset comprises a total of 267 R-band images, 204 from a 16 day…

Solar and Stellar Astrophysics · Physics 2015-05-19 V. R. Miller , M. D. Albrow , C. Afonso , Th. Henning

Stellar variability in the near-infrared (NIR) remains largely unexplored. The exploitation of public science archives with data-mining methods offers a perspective for the time-domain exploration of the NIR sky. We perform a comprehensive…

Solar and Stellar Astrophysics · Physics 2016-08-10 C. E. Ferreira Lopes , I. Dékány , M. Catelan , N. J. G. Cross , R. Angeloni , I. C. Leão , J. R. De Medeiros

We present the results of a massive variability search based on a photometric survey of a six square degree region along the Galactic plane at ($l = 305^\circ$, $b = -0.8^\circ$) and ($l = 330^\circ$, $b = -2.5^\circ$). This survey was…

This project is a massive near-infrared (NIR) search for variable stars in highly reddened and obscured open cluster (OC) fields projected on regions of the Galactic bulge and disk. The search is performed using photometric NIR data in the…

The stellar evolution theory of massive stars remains uncalibrated with high-precision photometric observational data mainly due to a small number of luminous stars that are monitored from space. Automated all-sky surveys have revealed…

Solar and Stellar Astrophysics · Physics 2017-02-08 Jaan Laur , Indrek Kolka , Tõnis Eenmäe , Taavi Tuvikene , Laurits Leedjärv

The Wide-field Infrared Survey Explorer Preliminary Data Release Source Catalog contains over 257 million objects. We describe the method used to flag variable source candidates in the Catalog. Using a method based on the chi- square of…

Instrumentation and Methods for Astrophysics · Physics 2012-03-28 Douglas I. Hoffman , R. M. Cutri , F. J. Masci , J. W. Fowler , K. A. Marsh , T. H. Jarrett

We conduct a systematic search for periodic variables in the hot subdwarf catalogue using data from the Zwicky Transient Facility. We present the classification of 67 HW Vir binaries, 496 reflection effect, pulsation or rotation sinusoids,…

Solar and Stellar Astrophysics · Physics 2023-07-31 Kevin Wang , Thomas Kupfer , Brad N. Barlow

The Asteroid Terrestrial-impact Last Alert System (ATLAS) carries out its primary planetary defense mission by surveying about 13000 deg^2 at least four times per night. The resulting data set is useful for the discovery of variable stars…

Results of the first two month of observations using the All Sky Automated Survey prototype camera are presented. More than 45 000 stars in 24 Selected Fields covering 140 sq. degrees were monitored a few times a night resulting in the…

Astrophysics · Physics 2007-05-23 G. Pojmanski

Variable stars play a key role in understanding the Milky Way and the universe. The era of astronomical big data presents new challenges for quick identification of interesting and important variable stars. Accurately estimating the periods…

Instrumentation and Methods for Astrophysics · Physics 2022-12-21 Xiao-Hui Xu , Qing-Feng Zhu , Xu-Zhi Li , Bin Li , Hang Zheng , Jin-Sheng Qiu , Hai-Bin Zhao

Most of our knowledge about the structure of the Milky Way has come from the study of variable stars. Among the variables, mimicking the periodic variation of pulsating stars, are the eclipsing binaries. These stars are important in…

Solar and Stellar Astrophysics · Physics 2021-03-31 E. Botan , R. K. Saito , D. Minniti , A. Kanaan , R. Contreras Ramos , T. S. Ferreira , L. V. Gramajo , M. G. Navarro

We describe the construction of a highly reliable sample of approximately 7,000 optically faint periodic variable stars with light curves obtained by the asteroid survey LINEAR across 10,000 sq.deg of northern sky. Majority of these…

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