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"13 results found.
- GRB 140311B: Mondy optical limit
- GRB 140311B: Swift-BAT refined analysis
- GRB 140311B: Fermi GBM Detection
- GRB 140311B: Swift/UVOT Upper Limits
- GRB 140311B: RATIR Optical and NIR Observations
- GRB 140311B: Swift-XRT refined Analysis
- GRB 140311B: final MASTER OT light curve
- GRB 140311B: Enhanced Swift-XRT position
- GRB 140311B: TAROT Calern observatory optical observations
- GRB 140311B: Swift-XRT observations
- GRB 140311B: Nanshan afterglow detection
- GRB 140311B: MASTER early optical observations
- GRB 140311B: Swift detection of a burst