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"14 results found.
- GRB 120212A: Fermi GBM observation
- GRB 120212A: GMG optical observation
- GRB 120212A: MITSuME Ishigakijima Optical Observation
- GRB 120212A: Swift-XRT refined Analysis
- GRB 120212A: NOT optical observation
- GRB 120212A: Swift/UVOT Detection
- GRB 120212A: Swift-BAT refined analysis
- GRB 120212A: Errata of subject in GCNC 12936
- GRB 120212A: Enhanced Swift-XRT position
- GRB 120212A: Kanata/HOWPol optical observation
- GRB 120212A: Swift-XRT observations
- GRB 120212A: Swift/UVOT detection
- GRB 120212A: Faulkes Telescope South afterglow candidate
- GRB 120212A: Swift detection of a burst