Exploring the variable sky with linear. iii. classification of periodic light curves
L. Palaversa,Željko Ivezić,Željko Ivezić,Laurent Eyer,Domagoj Ruždjak,Davor Sudar,Mario Galin,Andrea Kroflin,Martina Mesarić,Petra Munk,Dijana Vrbanec,Hrvoje Božić,Sarah Loebman,Branimir Sesar,Lorenzo Rimoldini,Nicholas Hunt-Walker,Jacob T VanderPlas,David Westman,J. Scott Stuart,Andrew C. Becker,Gregor Srdoc,P. R. Wozniak,Hakeem M. Oluseyi +22 more
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In this article, the authors describe the construction of a highly reliable sample of ~7000 optically faint periodic variable stars with light curves obtained by the asteroid survey LINEAR across 10,000 deg^2 of the northern sky.Abstract:
We describe the construction of a highly reliable sample of ~7000 optically faint periodic variable stars with light curves obtained by the asteroid survey LINEAR across 10,000 deg^2 of the northern sky. The majority of these variables have not been cataloged yet. The sample flux limit is several magnitudes fainter than most other wide-angle surveys; the photometric errors range from ~0.03 mag at r = 15 to ~0.20 mag at r = 18. Light curves include on average 250 data points, collected over about a decade. Using Sloan Digital Sky Survey (SDSS) based photometric recalibration of the LINEAR data for about 25 million objects, we selected ~200,000 most probable candidate variables with r < 17 and visually confirmed and classified ~7000 periodic variables using phased light curves. The reliability and uniformity of visual classification across eight human classifiers was calibrated and tested using a catalog of variable stars from the SDSS Stripe 82 region and verified using an unsupervised machine learning approach. The resulting sample of periodic LINEAR variables is dominated by 3900 RR Lyrae stars and 2700 eclipsing binary stars of all subtypes and includes small fractions of relatively rare populations such as asymptotic giant branch stars and SX Phoenicis stars. We discuss the distribution of these mostly uncataloged variables in various diagrams constructed with optical-to-infrared SDSS, Two Micron All Sky Survey, and Wide-field Infrared Survey Explorer photometry, and with LINEAR light-curve features. We find that the combination of light-curve features and colors enables classification schemes much more powerful than when colors or light curves are each used separately. An interesting side result is a robust and precise quantitative description of a strong correlation between the light-curve period and color/spectral type for close and contact eclipsing binary stars (β Lyrae and W UMa): as the color-based spectral type varies from K4 to F5, the median period increases from 5.9 hr to 8.8 hr. These large samples of robustly classified variable stars will enable detailed statistical studies of the Galactic structure and physics of binary and other stars and we make these samples publicly available.read more
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Understanding the Lomb–Scargle Periodogram
TL;DR: The goal of this paper is to build intuition about what assumptions are implicit in the use of the Lomb-Scargle periodogram and related estimators of periodicity so as to motivate important practical considerations required in its proper application and interpretation.
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General catalogue of variable stars: Version GCVS 5.1
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Journal ArticleDOI
The Catalina Surveys Periodic Variable Star Catalog
Andrew J. Drake,Matthew J. Graham,S. G. Djorgovski,Márcio Catelan,Márcio Catelan,Ashish Mahabal,G. Torrealba,D. Garcia-Alvarez,D. Garcia-Alvarez,Ciro Donalek,J. L. Prieto,Roy Williams,S. Larson,E. Christen sen,Vasily Belokurov,Sergey E. Koposov,E. Beshore,A. Boattini,A. Gibbs,R. Hill,R. A. Kowalski,Jeffrey R. Johnson,Frank Shelly +22 more
TL;DR: In this article, the Catalina Surveys Data Release-1 (CSDR1) data set was used for the analysis of 5.4 million variable star candidates within a 20,000 deg^2 region.
Journal ArticleDOI
Gaia Data Release 2. Specific characterisation and validation of all-sky Cepheids and RR Lyrae stars
Gisella Clementini,Vincenzo Ripepi,Roberto Molinaro,Alessia Garofalo,Alessia Garofalo,T. Muraveva,Lorenzo Rimoldini,Leanne P. Guy,G. Jevardat de Fombelle,K. Nienartowicz,O. Marchal,O. Marchal,Marc Audard,B. Holl,Silvio Leccia,Marcella Marconi,I. Musella,Nami Mowlavi,I. Lecoeur-Taïbi,Laurent Eyer,J. De Ridder,S. Regibo,L. M. Sarro,Laszlo Szabados,D. W. Evans,M. Riello +25 more
TL;DR: In this article, the Gaia second Data Release (DR2) presents a first mapping of full-sky RR Lyrae stars and Cepheids observed by the spacecraft during the initial 22 months of science operations.
Journal ArticleDOI
Gaia Data Release 2: Summary of the variability processing & analysis results
B. Holl,Marc Audard,Krzysztof Nienartowicz,G. Jevardat de Fombelle,O. Marchal,Nami Mowlavi,G. Clementini,J. De Ridder,D. W. Evans,Leanne P. Guy,A. C. Lanzafame,T. Lebzelter,L. Rimoldini,Maroussia Roelens,Shay Zucker,Elisa Distefano,A. Garofalo,Isabelle Lecoeur-Taïbi,M. Lopez,Roberto Molinaro,Tatiana Muraveva,A. Panahi,S. Regibo,V. Ripepi,L. M. Sarro,Conny Aerts,Richard I. Anderson,J. Charnas,F. Barblan,S. Blanco-Cuaresma,G. Busso,J. Cuypers,F. De Angeli,F. Glass,M. Grenon,Á. L. Juhász,A. Kochoska,P. Koubsky,A. F. Lanza,S. Leccia,D. Lorenz,Marcella Marconi,G. Marschalk,Tsevi Mazeh,S. Messina,Francois Mignard,André Moitinho,László Molnár,Stephan Morgenthaler,Ilaria Musella,C. Ordenovic,D. Ordonez,I. Pagano,L. Palaversa,Michał Pawlak,Emese Plachy,Andrej Prsa,M. Riello,Maria Süveges,László Szabados,E. Szegedi-Elek,Viktor Votruba,L. Eyer +62 more
TL;DR: The Gaia Data Release 2 (DR2) as mentioned in this paper summarizes the processing and results of the identification of variable source candidates of RR Lyrae stars, Cepheids, long period variables (LPVs), rotation modulation (BY Dra-type) stars, delta Scuti & SX Phoenicis stars, and short-timescale variables.
References
More filters
Journal ArticleDOI
Maximum likelihood from incomplete data via the EM algorithm
Journal Article
Scikit-learn: Machine Learning in Python
Fabian Pedregosa,Gaël Varoquaux,Alexandre Gramfort,Vincent Michel,Bertrand Thirion,Olivier Grisel,Mathieu Blondel,Peter Prettenhofer,Ron Weiss,Vincent Dubourg,Jake Vanderplas,Alexandre Passos,David Cournapeau,Matthieu Brucher,Matthieu Perrot,Edouard Duchesnay +15 more
TL;DR: Scikit-learn is a Python module integrating a wide range of state-of-the-art machine learning algorithms for medium-scale supervised and unsupervised problems, focusing on bringing machine learning to non-specialists using a general-purpose high-level language.
Journal ArticleDOI
Support-Vector Networks
Corinna Cortes,Vladimir Vapnik +1 more
TL;DR: High generalization ability of support-vector networks utilizing polynomial input transformations is demonstrated and the performance of the support- vector network is compared to various classical learning algorithms that all took part in a benchmark study of Optical Character Recognition.
Journal ArticleDOI
The Two Micron All Sky Survey (2MASS)
Michael F. Skrutskie,Michael F. Skrutskie,Roc M. Cutri,R. Stiening,Martin D. Weinberg,Stephen E. Schneider,John M. Carpenter,Chas Beichman,R. Capps,T. Chester,J. Elias,John P. Huchra,James Liebert,C. Lonsdale,David G. Monet,Stephan D. Price,Patrick Seitzer,Thomas H. Jarrett,J. D. Kirkpatrick,John E. Gizis,E. Howard,T. Evans,John W. Fowler,L. Fullmer,Robert L. Hurt,R. M. Light,E. L. Kopan,K. A. Marsh,H. McCallon,R. Tam,S. D. Van Dyk,S. Wheelock +31 more
TL;DR: The Two Micron All Sky Survey (2MASS) as mentioned in this paper collected 25.4 Tbytes of raw imaging data from two dedicated 1.3 m diameter telescopes located at Mount Hopkins, Arizona and CerroTololo, Chile.
Journal ArticleDOI
The Sloan Digital Sky Survey: Technical Summary
TL;DR: The Sloan Digital Sky Survey (SDSS) as mentioned in this paper provides the data to support detailed investigations of the distribution of luminous and non-luminous matter in the Universe: a photometrically and astrometrically calibrated digital imaging survey of pi steradians above about Galactic latitude 30 degrees in five broad optical bands.
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Lavigne,Y. Le Fustec,C. Le Poncin-Lafitte,Yveline Lebreton,S. Leccia,N. Leclerc,I. Lecoeur-Taïbi,H. Lenhardt,F. Leroux,S. Liao,E. Licata,H. E. P. Lindstrøm,T. A. Lister,E. Livanou,A. Lobel,M. López,S. Managau,Robert G. Mann,G. Mantelet,O. Marchal,Jon Marchant,Marcella Marconi,S. Marinoni,G. Marschalkó,D. J. Marshall,M. Martino,Gábor Marton,Nicolas Mary,Davide Massari,G. Matijevič,Tsevi Mazeh,Paul J. McMillan,S. Messina,D. Michalik,N. R. Millar,D. Molina,R. Molinaro,L. Molnár,P. Montegriffo,R. Mor,R. Morbidelli,Thierry Morel,D. Morris,A. F. Mulone,T. Muraveva,I. Musella,Gijs Nelemans,Luciano Nicastro,L. Noval,W. O'Mullane,C. Ordénovic,D. Ordóñez-Blanco,P. Osborne,C. Pagani,I. Pagano,F. Pailler,H. Palacin,L. Palaversa,A. Panahi,Michał Pawlak,A. M. Piersimoni,F.-X. Pineau,E. Plachy,G. Plum,E. Poggio,E. Poujoulet,A. Prša,L. Pulone,E. Racero,S. Ragaini,N. Rambaux,M. Ramos-Lerate,S. Regibo,Céline Reylé,F. Riclet,V. Ripepi,A. Riva,A. Rivard,G. Rixon,T. Roegiers,M. Roelens,M. 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