Gravitational Lensing with JWST (Solar Eclipse edition)

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Jose Maria Diego

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Mar 23, 2026, 11:16:05 AM (4 days ago) Mar 23
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A nice excuse to cool down in Sardinero beach with a pincho de tortilla and a beer while enjoying the total solar eclipse this summer. 

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Dear colleagues,

We are pleased to announce the conference Gravitational Lensing in Galaxy Clusters in the JWST Era, to be held in Santander, Spain, on 10–14 August, 2026.

Registration is now open on the conference webpage. Abstracts for contributed talks can be submitted until April 17, 2026. The selection of contributed talks will be announced by May 8, 2026.


The conference will focus on recent advances in gravitational lensing in galaxy clusters enabled by JWST, including:
  • Early galaxy formation revealed by strongly lensed JWST observations
  • Dark matter mapping and precision mass modeling of galaxy clusters
  • Lensed transients and time-domain lensing science
  • Results from latest major JWST lensing cluster programs
  • Synergies with complementary facilities (e.g., ALMA, VLT, ELT, Rubin, Roman, Euclid)
  • Future lensing surveys, tools, data products, and community efforts for lens modeling


The meeting is structured in two parts. The first half of the week (August 10–12) will feature open science talks covering a broad range of JWST lensing results, as well as broader community discussions, including “Lensing Surveys: past lessons and future directions”, aimed at shaping the next generation of cluster lensing efforts. These sessions will culminate in the Solar Eclipse on Wednesday afternoon.

The latter half (August 13–14) will focus more on a mix of open discussion and collaboration meetings, including activities organized within ongoing JWST programs such as VENUS and SLICE.

We hope this format provides flexibility for all participants: attendees are welcome to join discussion sessions, engage in emerging collaborations, participate in team meetings where appropriate, enjoy Santander and the beach, or depart after the main science program.

Confirmed Invited Speakers:Hakim Atek – High-z UniverseJen Lotz – Lensing Surveys (discussion lead)Justin Pierel – Lensed SupernovaeJane Rigby – Cosmic Noon

Scientific Organizing Committee:Ana Acebron, Maruša Bradač, Dan Coe, José M. Diego, Seiji Fujimoto, Guillaume Mahler, Johan Richard, Keren Sharon, Tommaso Treu, Adi Zitrin

Local Organizing Committee:Ana Acebron, José María Diego, José María Palencia

Registration fee is 425 EUR (early, before May 30) or 500 EUR (late, after June 5). The fee includes coffee breaks and lunches during the conference.

Important dates:April 17, 2026: Abstract submission deadlineMay 8, 2026: Notification of accepted talks and postersJune 5, 2026: Deadline for early registration paymentAugust 1, 2026: Late registration deadlineAugust 10, 2026: Conference begins (morning)August 12, 2026: Solar EclipseAugust 14, 2026: Conference ends (noon)

Best,Seiji Fujimoto, on behalf of the SOC




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