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"13 results found.
- GRB 110520A: NOT optical follow-ups
- Swift/UVOT observations of GRB110520A
- GRB 110520A: Swift-BAT refined analysis
- GRB 110520A: IAC80 I-band observations
- GRB 110520A: Swift-XRT refined Analysis
- GRB 110520A: Enhanced Swift-XRT position
- GRB 110520A: WHT IR observations
- GRB 110520A - NOT optical observation
- GRB 110520A: Skynet/DAO optical observations
- GRB 110520A: Liverpool Telescope Observations
- GRB 110520A: TAROT Calern observatory optical observations
- GRB 110520A: MASTER-NET optical observations
- GRB 110520A: Swift detection of a burst