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"16 results found.
- GRB 180325A: Global MASTER-Net OT prompt observations
- GRB 180314A: AstroSat CZTI detection
- Konus-Wind observation of GRB 180314A
- GRB 180314A: MITSuME Okayama optical upper limits
- GRB 180314A: Swift-BAT refined analysis
- GRB 180314A: TAROT La Silla observatory optical observations
- GRB 180314A: LCO Siding Springs observations
- GRB 180314A: Swift-XRT refined Analysis
- GRB 180314A: Fermi GBM observation
- GRB 180314A: VLT/X-shooter redshift
- GRB 180314A: Swift/UVOT Detection
- GRB 180314A: REM optical/NIR observations
- GRB 180314A: MASTER-Net OT dtetction
- GRB 180314A: Enhanced Swift-XRT position
- GRB180314A: GROND detection of the afterglow
- GRB 180314A: Swift detection of a burst with an optical counterpart