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"12 results found.
- GRB 130502A: optical upper limit
- GRB 130502A: Swift-BAT refined analysis
- GRB 130502A: Swift-XRT refined Analysis
- GRB 130502A: Fermi GBM detection
- GRB 130502A: Swift/UVOT Upper Limits
- GRB 130502A: RATIR Optical and NIR Observations
- GRB 130502A: Enhanced Swift-XRT position
- GRB 130502A: OSN and IAC80 I-band observations
- GRB 130502A: z-band observations from GTC
- GRB 130502A: TNG candidate counterpart
- GRB 130502A: T100 Observations
- GRB 130502A: Swift detection of a burst