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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"9 results found.
- GRB 110206A: Swift-XRT confirmation of the X-ray afterglow
- GRB 110206A: SMARTS optical/IR afterglow decay
- GRB 110206A: Decay of afterglow candidate
- GRB 110206A: SMARTS optical/IR afterglow candidate observations
- GRB 110206A: GROND detection of afterglow candidate
- GRB 110206A: UVOT detection of afterglow candidate
- GRB 110206A: Swift detection of a probable X-ray afterglow
- GRB 110206A: TAROT La Silla observatory optical observations
- GRB 110206A: a long GRB detected by INTEGRAL