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"17 results found.
- GRB 220107A: SAO RAS optical observations
- Konus-Wind detection of GRB 220107A
- GRB 220107A: further SAO RAS optical observations
- GRB 220107A: 6m BTA spectroscopic redshift
- GRB 220107A: SAO RAS optical observations
- GRB 220107A: AbAO and Terskol optical observations
- GRB 220107A: Nanshan/NEXT optical observations
- GRB 220107A: Swift/UVOT Detection
- GRB 220107A: MITSuME Akeno optical observation
- GRB 220107A: Swift-XRT afterglow detection
- GRB 220107A: AstroSat CZTI detection
- GRB 220107A: Fermi GBM observations
- GRB 220107A: Swift ToO observations
- Fermi GRB 220107A: Global MASTER-Net observations report
- GRB 220107A: Swift/BAT-GUANO arcminute localization
- GRB 220107A: BALROG localization (Fermi Trigger 663259536 / GRB 220107615)
- GRB 220107A: Fermi GBM Final Real-time Localization