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"20 results found.
- GRB 190613B: FRAM-Auger afterglow detection
- GRB 190613B: JCMT SCUBA-2 sub-mm observations
- GRB 190613B: AstroSat CZTI detection
- Konus-Wind observation of GRB 190613B
- GRB 190613B: Kitab observatory optical upper limit
- GRB 190613B: SEDM Observations
- GRB 190613B: Optical observation from Asiago Schmidt
- GRB 190613B: GROND Detection of the Optical/NIR Afterglow
- GRB 190613B: Insight-HXMT/HE detection
- GRB 190613B: BOOTES-5/JGT early optical observations
- GRB 190613B: Optical observations from NOT
- GRB 190613B: Swift-XRT refined Analysis
- GRB 190613B: Swift-BAT refined analysis
- GRB 190613B: KAIT Optical Afterglow Confirmation
- GRB 190613B: Swift/UVOT Detection
- GRB 190613B: Fermi GBM observation
- GRB 190613B: Enhanced Swift-XRT position
- GRB 190613B: BALROG localization (Fermi Trigger 582115625 / GRB 190613449)
- GRB 190613B: Swift detection of a burst with an optical counterpart
- GRB 190613B: Fermi GBM Final Real-time Localization