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"14 results found.
- GRB 061028: Swift/XRT Astrometry Correction
- GRB 061028: Optical R passband observations
- GRB 061028: VLA Observation
- GRB 061028: Futher P200 Observations
- GRB 061028: MDM Observations
- GRB 061028: P200 Observations
- GRB 061028: SARA upper limit
- GRB 061028: z band imaging
- GRB061028: XRT refined analysis
- GRB 061028: Swift/UVOT Observations
- GRB 061028, Swift-BAT refined analysis
- GRB 061028: TAROT Calern observatory late optical observations
- GRB 061028: TAROT Calern observatory optical observations
- GRB 061028: Swift detection of a burst