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Related papers: K2 Variable Catalogue II: Machine Learning Classif…

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We introduce a new transit search and vetting pipeline for observations from the K2 mission, and present the candidate transiting planets identified by this pipeline out of the targets in Campaigns 5 and 6. Our pipeline uses the Gaussian…

Earth and Planetary Astrophysics · Physics 2016-06-15 Benjamin J. S. Pope , Hannu Parviainen , Suzanne Aigrain

(Abridged) This paper explores the use of k-means clustering as a tool for automated unsupervised classification of massive stellar spectral catalogs. The classification criteria are defined by the data and the algorithm, with no prior…

Solar and Stellar Astrophysics · Physics 2015-06-12 J. Sanchez Almeida , C. Allende Prieto

We conducted a survey of nearby binary systems composed of main sequence stars of spectral types F and G in order to improve our understanding of the hierarchical nature of multiple star systems. Using Robo-AO, the first robotic adaptive…

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

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

Data collection for scientific applications is increasing exponentially and is forecasted to soon reach peta- and exabyte scales. Applications which process and analyze scientific data must be scalable and focus on execution performance to…

Instrumentation and Methods for Astrophysics · Physics 2018-10-09 Thomas Devine , Katerina Goseva-Popstojanova , Di Pang

The second data release of the Gaia mission includes an advance catalog of variable stars. The classification of these stars are based on sparse photometry from the first 22 months of the mission. We set out to investigate the purity and…

Solar and Stellar Astrophysics · Physics 2018-12-12 László Molnár , Emese Plachy , Áron L. Juhász , Lorenzo Rimoldini

We quantify the variability of faint unresolved optical sources using a catalog based on multiple SDSS imaging observations. The catalog covers SDSS Stripe 82, and contains 58 million photometric observations in the SDSS ugriz system for…

We present a variable star catalog of an extensive ground-based wide-field variability survey in the globular cluster omega Centauri. Using the ANU 40-inch (1m) telescope at Siding Spring Observatory, the cluster was observed with a 52'x52'…

Astrophysics · Physics 2008-11-26 David T. F Weldrake , Penny D Sackett , Terry J Bridges

We present the catalog of 947 variable stars located in the field of view of the Kepler satellite. The catalog is a result of the analysis of VI photometry obtained during the first 17-month observations in the ASAS3-North station. The…

Solar and Stellar Astrophysics · Physics 2009-04-09 A. Pigulski , G. Pojmanski , B. Pilecki , D. M. Szczygiel

Time-varying phenomena are one of the most substantial sources of astrophysical information and their study has led to many fundamental discoveries in modern astronomy. We have developed an automated tool to search and analyze variable…

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…

Time-series photometry of the CoRoT field SRa01 was carried out with the Berlin Exoplanet Search Telescope II (BEST II) in 2008/2009. A total of 1,161 variable stars were detected, of which 241 were previously known and 920 are newly found.…

With only two functional reaction wheels, Kepler cannot maintain stable pointing at its original target field and entered a new mode of observation called K2. Our method is based on many years of experience in planet hunting for the CoRoT…

Earth and Planetary Astrophysics · Physics 2016-10-19 S. C. C. Barros , O. Demangeon , M. Deleuil

We report on a data-driven spectral model that we have developed for the identification of double-lined spectroscopic binary stars (SB2s) in the LAMOST low-resolution survey (R$\sim$1800). Employing simultaneous fitting with both…

Solar and Stellar Astrophysics · Physics 2024-10-11 Junhui Liu , Bo Zhang , Jianfeng Wu , Yuan-Sen Ting

The 2MASS photometric calibration observations cover ~6 square degrees on the sky in 35 "calibration fields" each sampled in nominal photometric conditions between 562 and 3692 times during the four years of the 2MASS mission. We compile a…

Astrophysics · Physics 2009-11-13 Peter Plavchan , M. Jura , J. Davy Kirkpatrick , Roc M. Cutri , S. C. Gallagher

We develop a new analysis approach towards identifying related radio components and their corresponding infrared host galaxy based on unsupervised machine learning methods. By exploiting PINK, a self-organising map algorithm, we are able to…

Instrumentation and Methods for Astrophysics · Physics 2020-07-08 T. J. Galvin , M. Huynh , R. P. Norris , X. R. Wang , E. Hopkins , K. Polsterer , N. O. Ralph , A. N. O'Brien , G. H. Heald

A large number of unidentified sources found by astronomical surveys and other observations necessitate the use of an automated classification technique based on machine learning methods. The aim of this paper is to find a suitable…

High Energy Astrophysical Phenomena · Physics 2023-02-20 Shivam Kumaran , Samir Mandal , Sudip Bhattacharyya , Deepak Mishra

The Optical Gravitational Lensing Experiment (OGLE) continuously monitors hundreds of thousands of eclipsing binaries in the field of galactic bulge and the Magellanic Clouds. These objects have been classified into main morphological…

Solar and Stellar Astrophysics · Physics 2021-06-30 Attila Bódi , Tamás Hajdu

The automatic classification of X-ray detections is a necessary step in extracting astrophysical information from compiled catalogs of astrophysical sources. Classification is useful for the study of individual objects, statistics for…

Instrumentation and Methods for Astrophysics · Physics 2024-01-30 Víctor Samuel Pérez-Díaz , Juan Rafael Martínez-Galarza , Alexander Caicedo , Raffaele D'Abrusco