Dear Colleagues,

The 10th Physics and Astrophysics at the eXtreme workshop (PAX X) and the 3rd Cosmic Explorer Symposium will be held jointly at the University of Illinois Urbana-Champaign from 30 June – 3 July 2025. Please see details below.

You can still register until Saturday, 31 May 2025, 11:59 pm CDT, here: https://publish.illinois.edu/pax-xcesy/registration

We look forward to welcoming you in Urbana-Champaign.

Best wishes,

Helvi

--------------------------------------------- Dr. Helvi Witek Associate Professor Department of Physics University of Illinois at Urbana-Champaign

247 Loomis Lab 1110 W Green St Urbana, IL 61801 ---------------------------------------------

On 1/24/25 4:44 PM, Helvi Witek wrote:

Dear Colleagues,

The 10th Physics and Astrophysics at the eXtreme workshop (PAX X) and the 3rd Cosmic Explorer Symposium will be held jointly at the University of Illinois Urbana-Champaign from *30 June – 3 July 2025*. The Cosmic Explorer Symposium will bring together the community to discuss important aspects of the design and operations of the Cosmic Explorer gravitational-wave observatories, covering both observational and instrument science. The PAX-X workshop will explore how the ongoing and upcoming observations of gravitational and electromagnetic waves can help us understand physics at the extreme — strong gravitational fields, dark matter, nuclear physics, cosmology, and multimessenger astrophysics.

Panels will be organized around a small number of presentations to identify important areas for research and foster discussions and community feedback.

The registration is now open and will remain open*until May 1, 2025*.

https://publish.illinois.edu/pax-xcesy/registration*

Important: The maximum number of participants is 200. There is a registration fee of $61, and an optional fee of $55 to attend the conference dinner.

*We look forward to welcoming you in Urbana-Champaign.

Best wishes, Helvi Witek

On behalf of the organizing committee,

LOC: Hector O. Silva, Mateus Reinke Pelicer, Antonios Tsokaros, Helvi Witek, Deanna Frye. SOC: Nils Andersson, Stefan Ballmer, Lisa Barsotti, Emanuele Berti, Alessandra Corsi, Paul Fulda, Anuradha Gupta, Jan Harms, Carl-Johan Haster, Joey Key, Lionel London, David Ottaway, Sheila Rowan, Bangalore Sathyaprakash, Hector O. Silva, Antonios Tsokaros, Helvi Witek.