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 160804A: 15 GHz detections and upper limit from AMI
- GRB 160804A: RATIR Optical and NIR Observations
- GRB 160804A: TSHAO optical observations
- GRB 160804A: ISON/UAFO optical observations
- GRB 160804A: GROND observations
- GRB 160804A: VLT/X-shooter redshift
- GRB 160804A: SAO RAS optical observations
- GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
- GRB 160804A: Fermi GBM observation
- GRB 160804A: Swift-BAT refined analysis
- GRB 160804A: Swift/UVOT Detection
- GRB 160804A: Swift-XRT refined Analysis
- GRB 160804A: Enhanced Swift-XRT position
- GRB 160804A: Swift detection of a burst