C.D.S. - SIMBAD4 rel 1.7 - 2021.05.15CEST23:51:01

2017MNRAS.471.3378H - Mon. Not. R. Astron. Soc., 471, 3378-3397 (2017/November-1)

Support vector machine classification of strong gravitational lenses.


Abstract (from CDS):

The imminent advent of very large-scale optical sky surveys, such as Euclid and the Large Synoptic Survey Telescope (LSST), makes it important to find efficient ways of discovering rare objects such as strong gravitational lens systems, where a background object is multiply gravitationally imaged by a foreground mass. As well as finding the lens systems, it is important to reject false positives due to intrinsic structure in galaxies, and much work is in progress with machine learning algorithms such as neural networks in order to achieve both these aims. We present and discuss a support vector machine (SVM) algorithm which makes use of a Gabor filter bank in order to provide learning criteria for separation of lenses and non-lenses, and demonstrate using blind challenges that under certain circumstances, it is a particularly efficient algorithm for rejecting false positives. We compare the SVM engine with a large-scale human examination of 100 000 simulated lenses in a challenge data set, and also apply the SVM method to survey images from the Kilo Degree Survey.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): gravitational lensing: strong - methods: data analysis - methods: statistical - surveys - galaxies: general - galaxies: general

Simbad objects: 3

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Number of rows : 3

N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
1 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2280 0
2 8C 0958+561 QSO 10 01 20.6915852239 +55 53 55.595776916   17.16 16.95     ~ 705 3
3 NGC 6028 LIN 16 01 28.9537720775 +19 21 35.559420977   14.8       ~ 50 0

    Equat.    Gal    SGal    Ecl

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