LSST Strong Lensing Science Collaboration

Welcome to the Strong Gravitational Lensing Science Collaboration (SLSC)!

LSST will find more strong gravitational lensing events than any survey preceding it, and will monitor them all at a cadence of a few days to a few weeks. Concurrent space-based optical or perhaps ground-based surveys may provide higher resolution imaging: the biggest advances in strong lensing science made with LSST will be in those areas that benefit most from the large volume, and the high accuracy multi-filter time series.

Among its many applications, strong lensing can be used to trace total mass distributions of galaxies, groups and clusters; test detailed predictions of CDM on sub-galaxy scales; constrain cosmological parameters; study high-redshift transients and host galaxies; probe accretion disk structure with microlensing; and place constraints on stellar mass functions. The SLSC considers all aspects of strong lensing science and the best means of extracting it from LSST data. We work closely with the DESC Strong Lensing Working Group (DESC-SLWG) with a large overlap in membership. Given the varied applications of strong gravitational lensing our science areas of interest also overlap with a number of other LSST science collaborations and working groups including Dark Energy, Galaxies, Clusters, AGN, and Transients.


The current Co-Chairs are:

  • Chuck Keeton (keeton at
  • Aprajita Verma (aprajita.verma at

The SLSC collaboration was originally set-up and run by Phil Marshall (pjm at

For information on eligibility and how to apply to join the SLSC please go to the Apply link on the above right menu or here.

Meetings and Communications

We currently meet once every two months in a joint telecon with the DESC Strong Lensing Working Group, and have face-to-face sessions in the DESC meetings/workshops.

We operate a listserv Collaboration mailing list which you will be automatically added to when becoming a member of the SLSC.

Members can be reached via email to lsst-stronglens at

You can also follow the designated Slack channel on #strong-lensing