GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide.
- Circulars are brief, citeable, and human-readable.
- Circulars can announce observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans.
- Circulars report on high-energy, multi-messenger, and variable or transient astrophysical events.
Circulars allow the GRB community to post messages (by email, or by submitting a web form) to a public list where they are distributed rapidly to the entire GRB community and archived permanently. These prose-style messages allow the community to coordinate and make optimum use of its limited resources.
For more details on how to use GCN Circulars, see:
- Subscribing to receive GCN Circulars by email
- Submitting to post your own GCN Circulars
- Style Guide for how to write an effective GCN Circular
- Archive for how to search for and browse GCN Circulars
Go to GCN Circulars Archive