The GCN Team is pleased to announce several new features and updates.

Einstein Probe Notices ======================

GCN Notices for Einstein Probe (EP) are now available in JSON format over Kafka (https://gcn.nasa.gov/quickstart). EP notices are not available via GCN Classic or email. - Summary: EP is a mission of the Chinese Academy of Sciences (CAS) (https://ep.bao.ac.cn/ep/) in collaboration with the European Space Agency (ESA) (https://www.cosmos.esa.int/web/einstein-probe/mission) and the Max Planck Institute for Extraterrestrial Physics (MPE) (https://www.mpe.mpg.de/7867826/EinsteinProbe). It is dedicated to time-domain high-energy astrophysics. Its primary goals are to discover high-energy transients and monitor variable objects. - Rate: Approximately 100 notices per year. - Time Delay: EP sends alerts via GCN within ~60 seconds of detection. - Notice Type: The new WXT notice type gcn.notices.einstein_probe.wxt.alert (https://gcn.nasa.gov/missions/einstein-probe) provides trigger information including localization. - Notice Schema and Examples: The JSON schema defining the notice format and examples can be viewed in the Schema Browser (https://gcn.nasa.gov/docs/schema/stable/gcn/notices/einstein_probe/wxt/alert...) or the GCN schema repository (https://github.com/nasa-gcn/gcn-schema/tree/main/gcn/notices/einstein_probe/...).

Astro Flavored Markdown Circulars =================================

You can now add rich text formatting, data tables, and references to journals and common astronomical databases to GCN Circulars using Astro Flavored Markdown, a dialect of the popular Markdown lightweight markup language. See documentation on Astro Flavored Markdown (https://gcn.nasa.gov/docs/circulars/markdown).

Notices Schema v4.0.0 =====================

Explore GCN Schema via the Schema Browser (https://gcn.nasa.gov/docs/schema/v4.0.0/gcn/notices). Changes to the GCN Schema include: - Addition of Einstein Probe WXT Notice topic - Addition of BurstCube Notice topic (not yet producing notices) - Change to localization core schema that simplifies localization uncertainty parameterization (now `ra_dec_error`) to allow either a single radius or three values that describe the localization region as an ellipse. This change is not backwards compatible. - Note that the `$schema` field in each GCN Notice identifies the version of the schema it is utilizing. gcn.notices.icecube.lvk_nu_track_search(https://gcn.nasa.gov/docs/schema/stable/gcn/notices/icecube/lvk_nu_track_sea...) will update on the morning of June 18, 2024, and gcn.notices.swift.bat.guano (https://gcn.nasa.gov/docs/schema/stable/gcn/notices/swift/bat/Guano.schema.j...) will be updated at a later date.

For more details on this new feature and an archive of GCN news and announcements, see https://gcn.nasa.gov/news.

For questions, issues, or bug reports, please contact us via: - Contact form: https://gcn.nasa.gov/contact - GitHub issue tracker: https://github.com/nasa-gcn/gcn.nasa.gov/issues

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