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"20 results found.
- GRB 130505A: MITSuME Akeno Optical observation
- GRB 130505A: Suzaku WAM observation of the prompt emission
- GRB 130505A: RATIR Optical and NIR Observations
- GRB 130505A: Tautenburg afterglow observations
- GRB 130505A, Swift-BAT refined analysis
- GRB 130505A: optical observations
- GRB 130505A: E_iso record retraction
- GRB 130505A: correction to GCN 14575
- GRB 130505A: Swift-XRT refined Analysis
- GRB 130505A: Largest E_iso ever measured
- Konus-Wind observation of GRB 130505A
- Swift/UVOT observations of GRB130505A
- GRB 130505A: iTelescope T12 optical observations
- GRB 130505A: Xinglong TNT optical observations
- GRB 130505A; Weihai optical observations
- GRB 130505A: Enhanced Swift-XRT position
- GRB 130505A: MITSuME Okayama Optical Observation
- GRB 130505A - Gemini-N/GMOS redshift determination
- GRB 130505A: MAXI/GSC detection
- GRB 130505A: Swift detection of a burst with optical afterglow