COSMOS lens candidates with LensFlow Virtual Observatory Resource

Authors
  1. Pourrahmani M.
  2. Nayyeri H.
  3. Cooray A.
  4. Published by
    CDS
Abstract

In this work, we present our machine learning classification algorithm for identifying strong gravitational lenses from wide-area surveys using convolutional neural networks; LensFlow. We train and test the algorithm using a wide variety of strong gravitational lens configurations from simulations of lensing events. Images are processed through multiple convolutional layers that extract feature maps necessary to assign a lens probability to each image. LensFlow provides a ranking scheme for all sources that could be used to identify potential gravitational lens candidates by significantly reducing the number of images that have to be visually inspected. We apply our algorithm to the HST/ACS i-band observations of the COSMOS field and present our sample of identified lensing candidates. The developed machine learning algorithm is more computationally efficient and complimentary to classical lens identification algorithms and is ideal for discovering such events across wide areas from current and future surveys such as LSST and WFIRST.

Keywords
  1. gravitational-lensing
  2. hst-photometry
  3. visible-astronomy
Bibliographic source Bibcode
2018ApJ...856...68P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/856/68
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/856/68
Document Object Identifer DOI
doi:10.26093/cds/vizier.18560068

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/856/68
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/856/68
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/856/68
IVOA Table Access TAP
https://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/856/68/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/856/68/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/856/68/table2?

History

2019-03-14T12:01:48Z
Resource record created
2019-03-14T12:01:48Z
Created
2022-03-08T14:20:03Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr