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Resource Record Summary

Catalog Service:
COSMOS lens candidates with LensFlow
Short name: J/ApJ/856/68
IVOA Identifier: ivo://CDS.VizieR/J/ApJ/856/68Publisher: CDSivo://CDS[Pub. ID]
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/856/68
VO Compliance: Level 2: This is a VO-compliant resource.		 Status: active
Registered: 2019 Mar 14 12:01:48Z
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Description


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.

More About this Resource

About the Resource Providers

This section describes who is responsible for this resource

Publisher: CDSivo://CDS[Pub. ID]

Creators:
Pourrahmani M.Nayyeri H.Cooray A.

Contact Information:
X CDS support team
Email: cds-question at unistra.fr
Address: CDS
Observatoire de Strasbourg
11 rue de l'Universite
F-67000 Strasbourg
France

Status of This Resource

This section provides some status information: the resource version, availability, and relevant dates.

Version: n/a
Availability: This is an active resource.
  • This service provides only public data.
Relevant dates for this Resource:
  • Updated: 2022 Mar 08 14:20:03Z
  • Created: 2019 Mar 14 12:01:48Z

This resource was registered on: 2019 Mar 14 12:01:48Z
This resource description was last updated on: 2022 Mar 08 14:20:03Z
What This Resource is About

This section describes what the resource is, what it contains, and how it might be relevant.

Resource Class: CatalogService
This resource is a service that provides access to catalog data. You can extract data from the catalog by issuing a query, and the matching data is returned as a table.
Resource type keywords:
  • Catalog
 Subject keywords:
  • Gravitational lensing
  • Optical astronomy
  • HST photometry
  • Photometry
Intended audience or use:
  • Research: This resource provides information appropriate for supporting scientific research.
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/856/68 Literature Reference: 2018ApJ...856...68P

Related Resources:

Other Related Resources
TAP VizieR generic service(IsServedBy) ivo://CDS.VizieR/TAP [Res. ID]
Conesearch service(IsServedBy)
II/284 : COSMOS Multi-Wavelength Photometry Catalog (Capak+, 2007) ivo://CDS.VizieR/II/284 [Res. ID]

Data Coverage Information

This section describes the data's coverage over the sky, frequency, and time.

Wavebands covered:

  • Optical
Rights and Usage Information

This section describes the rights and usage information for this data.

Rights:

Available Service Interfaces

Custom Service

This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for this service interface:
Custom Service

This is service that does not comply with any IVOA standard but instead provides access to special capabilities specific to this resource.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for this service interface:
  • URL-based interface: http://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/856/68
Table Access Protocol - Auxiliary ServiceXX

This is a standard IVOA service that takes as input an ADQL or PQL query and returns tabular data.

VO Compliance: Level 2: This is a VO-compliant resource.
Available endpoints for the standard interface:
  • http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Simple Cone SearchXXSearch Me

This is a standard IVOA service that takes as input a position in the sky and a radius and returns catalog records with positions within that radius.

VO Compliance: Level 2: This is a VO-compliant resource.
Description:
Cone search capability for table J/ApJ/856/68/table2 (Catalog of identified lenses by LensFlow)
Available endpoints for the standard interface:
  • http://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/856/68/table2?
Maximum search radius accepted: 180.0 degrees
Maximum number of matching records returned: 50000
This service supports the VERB input parameter:
Use VERB=1 to minimize the returned columns or VERB=3 to maximize.

Developed with the support of the National Science Foundation
under Cooperative Agreement AST0122449 with the Johns Hopkins University
The NAVO project is a member of the International Virtual Observatory Alliance

This NAVO Application is hosted by the Space Telescope Science Institute
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