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"17 results found.
- GRB 170705A: AstroSat CZTI detection
- GRB 170705A: TShAO optical observations
- GRB 170705A: Further RATIR Optical and NIR Observations and Steepening of Fading
- GRB 170705A: KAIT Optical Observations
- GRB 170705A: Insight-HXMT observation
- GRB 170705A: ISON/Terskol optical observations
- Konus-Wind observation of GRB 170705A
- GRB 170705A: Redshift from 10.4m GTC/OSIRIS
- GRB 170705A: Fermi GBM observation
- GRB 170705A: Swift-BAT refined analysis
- GRB 170705A: MITSuME Akeno Optical Observation
- GRB 170705A: Swift/UVOT Detection
- GRB 170705A: RATIR Optical and NIR Observations
- GRB 170705A: Swift-XRT refined Analysis
- GRB 170705A: MASTER-OAFA early OT observations
- GRB 170705A: Enhanced Swift-XRT position
- GRB 170705A: Swift detection of a burst with an optical counterpart