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"17 results found.
- GRB 061217: Magellan host galaxy redshift
- GRB 061217: Astrometry-Corrected XRT Position
- GRB 061217: Confirmation of host candidate
- GRB 061217: Object ib GCN 5948 is a star
- GRB 061217: Extended object in the revised XRT error circle
- GRB 061217, Candidate host galaxy
- GRB 061217 - Swift/XRT position correction
- GRB 061217: TAROT Calern observatory optical observations
- GRB 061217, SMARTS optical observations
- GRB 061217: optical observations at Calar Alto
- GRB061217 - Swift/XRT refined analysis
- GRB 061217, Further Swift-BAT refined analysis of the short hard burst
- GRB 061217, Swift-BAT refined analysis
- GRB 061217: Magellan Observations
- GRB 061217: REM prompt observations
- GRB 061217: ROTSE-III Optical Limits
- GRB 061217: Swift detection of a short hard burst