ON MACHINE-LEARNED CLASSIFICATION OF VARIABLE STARS WITH SPARSE AND NOISY TIME-SERIES DATA
@article{Richards2011ONMC, title={ON MACHINE-LEARNED CLASSIFICATION OF VARIABLE STARS WITH SPARSE AND NOISY TIME-SERIES DATA}, author={Joseph W. Richards and Dan L. Starr and Nathaniel R. Butler and Joshua S. Bloom and John M. Brewer and Arien Crellin-Quick and Justin Higgins and Rachel Kennedy and Maxime Rischard}, journal={The Astrophysical Journal}, year={2011}, volume={733} }
With the coming data deluge from synoptic surveys, there is a need for frameworks that can quickly and automatically produce calibrated classification probabilities for newly observed variables based on small numbers of time-series measurements. In this paper, we introduce a methodology for variable-star classification, drawing from modern machine-learning techniques. We describe how to homogenize the information gleaned from light curves by selection and computation of real-numbered metrics…
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76 References
Automated supervised classification of variable stars - I. Methodology
- Computer Science
- 2007
An overview of the stellar variability classes that are presently known, in terms of some relevant stellar parameters, to use the class descriptions obtained as the basis for an automated ``supervised classification'' of large databases.
Robust Machine Learning Applied to Astronomical Data Sets. I. Star-Galaxy Classification of the Sloan Digital Sky Survey DR3 Using Decision Trees
- Physics
- 2006
We provide classifications for all 143 million nonrepeat photometric objects in the Third Data Release of the SDSS using decision trees trained on 477,068 objects with SDSS spectroscopic data. We…
CONSTRUCTION OF A CALIBRATED PROBABILISTIC CLASSIFICATION CATALOG: APPLICATION TO 50k VARIABLE SOURCES IN THE ALL-SKY AUTOMATED SURVEY
- Computer Science
- 2012
A process to produce a probabilistic classification catalog of variability with machine learning from a multi-epoch photometric survey and a methodology for feature-based anomaly detection, which allows discovery of objects in the survey that do not fit within the predefined class taxonomy are described.
Lightcurve Classification in Massive Variability Surveys
- Geology
- 2003
This paper pioneers the use of neural networks to provide a fast and automatic way to classify lightcurves in massive photometric datasets. As an example, we provide a working neural network that can…
Automated supervised classification of variable stars II. Application to the OGLE database
- Computer Science
- 2008
A classification system that can process huge amounts of time series in negligible time and provide reliable samples of the main variability classes is constructed.
Automated classification of variable stars for All‐Sky Automated Survey 1–2 data
- Physics
- 2001
With the advent of surveys generating multi-epoch photometry and the discovery of large numbers of variable stars, the classification of these stars has to be automatic. We have developed such a…
Automated probabilistic classification of transients and variables
- Geology
- 2008
This work describes a methodology now under development for a prototype event classification system; it involves Bayesian and Machine Learning classifiers, automated incorporation of feedback from follow-up observations, and discriminated or directed follow- up requests.
Light-curve classification in massive variability surveys — I. Microlensing
- Geology
- 2003
This paper exploits neural networks to provide a fast and automatic way to classify light curves in massive photometric data sets. As an example, we provide a working neural network that can…
Detecting Variability in Massive Astronomical Time-Series Data I: application of an infinite Gaussian mixture model
- Computer Science
- 2009
A new framework to detect various types of variable objects within massive astronomical time-series data by using a non-parametric Bayesian clustering algorithm based on an infinite GaussianMixtureModel (GMM) and the Dirichlet Process is presented.
Variability type classification of multi-epoch surveys
- Environmental Science
- 2009
The classification of time series from photometric large scale surveys into variability types and the description of their properties is difficult for various reasons including but not limited to the…