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.
- Konus-Wind observation of GRB 180316A
- GRB 180316A: RATIR Optical Observations
- GRB 180316A: MITSuME Akeno optical upper limits
- GRB 180316A: MITSuME Okayama optical upper limits
- GRB 180316A: TSHAO optical observations
- GRB 180316A: RATIR Optical Observations, Possible Re-brightening
- GRB 180316A: Swift-BAT refined analysis
- GRB 180316A: Swift-XRT refined Analysis
- GRB 180316A: Swift/UVOT Detection
- GRB 180316A: RATIR Optical Observations
- GRB 180316A: Enhanced Swift-XRT position
- GRB 180316A: LCO Cerro Tololo observations
- GROND observations of GRB 180316A
- GRB 180316A: Prompt enhanced Swift-XRT position
- GRB 180316A: Swift detection of a burst