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"14 results found.
- GRB 151027B: ATCA radio detection
- GRB 151027B: RATIR Late-Time Upper Limits
- GRB 151027B: Swift UVOT detection
- GRB 151027B: LCOGT FTN afterglow observations
- GRB 151027B: Swift/UVOT Upper Limits
- GRB 151027B: Swift-BAT refined analysis
- GRB 151027B: RATIR Observations
- GRB 151027B: MASTER-NET early OT detection
- GRB 151027B: Swift-XRT refined Analysis
- GRB 151027B: GROND Optical/NIR Afterglow Detection
- GRB 151027B: VLT/X-shooter redshift
- GRB 151027B: Enhanced Swift-XRT position
- GRB 151027B: NOT optical afterglow candidate
- GRB 151027B: Swift detection of its 1000-th burst