GCN Circulars
GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.
Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"11 results found.
- GRB 161023A: GROND Observations
- GRB 161023A: Swift-XRT afterglow detection
- Konus-Wind observation of GRB 161023A
- GRB 161023A: TAROT La Silla observatory optical observations
- GRB 161023A: Zadko observatory - Gingin optical observations
- GRB 161023A: Watcher optical observations
- GRB 161023A: LCOGT-FTS optical observations
- GRB 161023A: Swift ToO observations
- GRB 161023A VLT/X-shooter redshift
- GRB 161023A: A long GRB detected by INTEGRAL
- GRB 161023A (Integral trigger 7613) MASTER-Net bright OT detection