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"15 results found.
- Konus-Wind observation of GRB 110406A
- GRB 110106A: CrAO optical observations
- GRB110106A, mm-radio observations
- Short GRB 110106A: MASTER OT observations
- GRB 110106A: TNG NIR observations
- GRB 110106A: ISAS-Kanazawa optical upper limit
- GRB 110106A: MITSuME Okayama optical upper limits
- GRB 110106A: Swift/UVOT Upper Limits
- GRB 110106A: TNG redshift of the closeby galaxy
- GRB 110106A: Swift-XRT refined Analysis
- GRB 110106A: Swift-BAT refined analysis
- GRB 110106A: Enhanced Swift-XRT position
- GRB 110106A: TNG optical observations and candidate counterparts
- GRB 110106A: MASTER optical observations
- GRB 110106A: Swift detection of a burst