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"14 results found.
- GRB 161117A: SMARTS optical/IR afterglow observations
- Konus-Wind observation of GRB 161117A
- GRB 161117A iTelescope observation
- GRB 161117A: MASTER-OAFA (Argentina) prompt OT observations
- GRB 161117A: TAROT La Silla observatory optical observations
- GRB 161117A: GMG observation limit
- GRB 161117A: Fermi GBM detection/observation
- GRB 161117A: Swift/UVOT Detection
- GRB 161117A: Swift-BAT refined analysis
- GRB 161117A: Swift-XRT refined Analysis
- GRB 161117A: Enhanced Swift-XRT position
- GRB161117A: REM optical and NIR afterglow detection
- GRB 161117A: VLT/X-shooter spectroscopy and redshift
- GRB 161117A: Swift detection of a burst with an optical counterpart