New periodic variable stars coincident with ROSAT sources discovered using SuperWASP [PDF]
, 2007 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. Collier Cameron +67 more
core +5 more sources
Observation of periodic variable stars towards the Galactic spiral arms by EROS II [PDF]
, 2002 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, b = 0:8 )a nd (l = 330, b = 2:5).
F. Derue +48 more
openalex +3 more sources
Minute-Cadence Observations of the LAMOST Fields with the TMTS V. Machine Learning Classification of TMTS Catalogues of Periodic Variable Stars [PDF]
Monthly notices of the Royal Astronomical SocietyPeriodic variables are always of great scientific interest in astrophysics. Thanks to the rapid advancement of modern large-scale time-domain surveys, the number of reported variable stars has experienced substantial growth for several decades, which ...
Fangzhou Guo +19 more
openalex +3 more sources
San Pedro meeting on Wide Field Variability Surveys: Some concluding comments
EPJ Web of Conferences, 2017 This is a written version of the closing talk at the 22nd Los Alamos Stellar pulsation conference on wide field variability surveys. It comments on some of the issues which arise from the meeting.
Feast Michael W.
doaj +3 more sources
CHARACTERIZATION OF CoRoT TARGET FIELDS WITH BERLIN EXOPLANET SEARCH TELESCOPE. II. IDENTIFICATION OF PERIODIC VARIABLE STARS IN THE LRc2 FIELD [PDF]
, 2009 We report on photometric observations of the CoRoT LRc2 field with the new robotic Berlin Exoplanet Search Telescope II (BEST II). The telescope system was installed and commissioned at the Observatorio Cerro Armazones, Chile, in 2007. BEST II is a small
P. Kábath +10 more
openalex +3 more sources
A New Period Determination Method for Periodic Variable Stars [PDF]
Publications of the Astronomical Society of the Pacific, 2022 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.
Xiao-hui Xu +6 more
semanticscholar +1 more source
Astrophysical Journal Supplement Series, 2021 We present a catalog of 75,867 periodic variable stars from data release 7 of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope. We calculated the chromospheric activity index, equivalent widths for 201,349 spectra, and excess fractional ...
L. Long +7 more
semanticscholar +1 more source
Classification of Periodic Variable Stars with Novel Cyclic-Permutation Invariant Neural Networks [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We present Cyclic-Permutation Invariant Neural Networks, a novel class of neural networks (NNs) designed to be invariant to phase shifts of period-folded periodic sequences by means of ‘symmetry padding’.
Keming Zhang, J. Bloom
semanticscholar +1 more source
Periodic Variable Star Classification with Deep Learning: Handling Data Imbalance in an Ensemble Augmentation Way [PDF]
Publications of the Astronomical Society of the Pacific, 2023 Time-domain astronomy is progressing rapidly with the ongoing and upcoming large-scale photometric sky surveys led by the Vera C. Rubin Observatory project (LSST). Billions of variable sources call for better automatic classification algorithms for light
Zihan Kang +6 more
semanticscholar +1 more source
Sparse Logistic Regression for RR Lyrae versus Binaries Classification
The Astrophysical Journal, 2023 RR Lyrae (RRL) stars are old, low-mass, radially pulsating variable stars in their core helium burning phase. They are popular stellar tracers and primary distance indicators since they obey well-defined period–luminosity relations in the near-infrared ...
Piero Trevisan +6 more
doaj +1 more source