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"15 results found.
- GRB 110726A: two epochs of SAO RAS optical observations
- GRB 110726A: Swift-XRT refined Analysis
- GRB 110726A: optical upper limit in CrAO
- GRB 110726A: EVLA observations
- GRB 110726A: IAC80 R-band observations
- GRB 110726A: ROTSE-III refined analysis, fast decay in early phase
- GRB110726A: MITSuME Ishigakijima Optical Observation
- GRB 110726A: Further Swift/UVOT Observations
- GRB110726A: Gemini-N tentative redshift
- GRB 110726A: Swift-BAT refined analysis
- GRB 110726A: Enhanced Swift-XRT position
- GRB 110726A: Swift/UVOT Detection
- GRB 110726A: Liverpool Telescope observations
- GRB 110726: ROTSE-III Detection of Optical Counterpart
- GRB 110726A: Swift detection of a burst