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"13 results found.
- GROND afterglow detection of GRB 181010A
- GRB 181010A: REM optical and NIR afterglow detection
- GRB 181010A: Swift-BAT refined analysis
- GRB 181010A: Fermi GBM observation
- GRB 181010A: ePESSTO NTT optical observations
- GRB 181010A: Swift/UVOT Detection
- GRB 181010A: Swift-XRT refined Analysis
- GRB 181010A: VLT/X-shooter redshift
- GRB 181010A: Enhanced Swift-XRT position
- GRB 181010A: RATIR Optical and NIR Afterglow Detection
- GRB 181010A: LCO Cerro Tololo observations
- GRB 181010A: MASTER-Argentina OT detection
- GRB 181010A: Swift detection of a burst with an optical counterpart