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"16 results found.
- GRB 150811A: Continued RATIR Observations
- GRB 150811A: Continued RATIR Observations
- GRB 150811A: KAIT Refined Analysis
- GRB 150811A: VLA Detection
- GRB 150811A: Continued RATIR Observations
- GRB 150811A: Swift/UVOT further observations
- GRB 150811A: Swift-BAT refined analysis
- GRB 150811A: SAO RAS optical observations
- GRB 150811A: Swift-XRT refined Analysis
- GRB 150811A: P60 Observations
- GRB 150811A: Enhanced Swift-XRT position
- GRB 150811A: LCOGT-McDonald afterglow detection
- GRB 150811A: Swift/UVOT Detection
- GRB 150811A: KAIT optical candidate
- GRB 150811A: RATIR Optical Afterglow Detection
- GRB 150811A: Swift detection of a burst