# Webinar: GWTC-4.0 Introduction and Data Release

**URL:** <https://ask.igwn.org/t/webinar-gwtc-4-0-introduction-and-data-release/1396>\
**Category:** Announcements\
**Created:** [November 10, 2025, 8:24pm UTC](https://ask.igwn.org/t/webinar-gwtc-4-0-introduction-and-data-release/1396 "2025-11-10T20:24:24Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jonah](https://yyz1.discourse-cdn.com/flex031/user_avatar/ask.igwn.org/jonah/32/10_2.png) [@jonah](https://ask.igwn.org/u/jonah)\
**Post date:** [November 10, 2025, 8:24pm UTC](https://ask.igwn.org/t/webinar-gwtc-4-0-introduction-and-data-release/1396/1 "2025-11-10T20:24:24Z")

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On **Thursday, 13 November 2025, at 10:00 AM Eastern US (other time zones below)**, the LVK will host an online webinar entitled “ **Introduction and Data Release: GWTC-4.0**.” This webinar will present an introduction to the GWTC-4.0 catalog and associated data release.

**You can [register for the webinar here](https://wisconsin-edu.zoom.us/webinar/register/WN_WwSLMBI_T4qzcmc9tijbEg).**

Associated papers:

- [[2508.18080] GWTC-4.0: An Introduction to Version 4.0 of the Gravitational-Wave Transient Catalog](https://arxiv.org/abs/2508.18080)
- [[2508.18079] Open Data from LIGO, Virgo, and KAGRA through the First Part of the Fourth Observing Run](https://arxiv.org/abs/2508.18079)

The webinar is open to any interested person. A recording will be made available at [https://www.youtube.com/@LIGOVirgo](https://www.youtube.com/@LIGOVirgo) for those who cannot attend the live event.

Other time zones:

- Wed, 13 Nov at 07:00 Los Angeles
- Wed, 13 Nov at 09:00 Chicago
- Wed, 13 Nov at 16:00 Pisa
- Wed, 13 Nov at 20:30 Pune
- Thu, 14 Nov at 00:00 Tokyo
- Thu, 14 Nov at 02:00 Sydney