GCN Circulars
GCN Circulars are rapid bulletins submitted by and distributed to the community. 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"19 results found.
- GRB 260915A: VLT optical and near-infrared upper limits
- GRB 260915A: Swift-XRT afterglow detection
- GRB 260915A: SVOM/ECLAIRs refined analysis
- GRB 260915A: J-band upper limit with WINTER
- GRB 260915A: Swift ToO observations
- GRB 260915A: J-band upper limit by SYSU 80cm infrared telescope
- GRB 260915A: SVOM/C-GFT optical upper limits
- GRB 260915A: EP-FXT follow-up observation
- GRB 260915A: SVOM/VT refined early optical upper limits
- GRB 260915A: EP-FXT follow-up observation
- GRB 260915A: REM optical/NIR observations
- GRB 260915A: SVOM/VT optical upper limits
- GRB 260915A: SVOM/COLIBRÍ (FM-GFT) optical upper limit
- GRB 260915A: 10.4m GTC deep optical limits
- GRB 260915A: NOT optical upper limit
- GRB 260915A: SVOM/VT optical upper limits from VHF data
- Fermi GBM Sub-Threshold Detection of GRB 260915A
- GRB 260915A: LCO optical upper limits
- GRB 260915A: SVOM detection of a burst