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.
- GRB 131024B: Suzaku WAM observation of the prompt emission
- GRB 131024B: AAO optical upper limit
- GRB 131024B: Mondy optical upper limits
- GRB 131024B: MASTER prompt optical observation
- GRB 131024B, Swift-BAT refined analysis
- GRB 131024B: Fermi GBM observation
- GRB 131024B: RATIR Optical and NIR Observations
- GRB 131024B: Swift/UVOT Upper Limits
- GRB 131024B : Xinglong TNT upper limit
- GRB 131024B: Swift-XRT refined Analysis
- GRB 131024B: Nanshan optical upper limit
- GRB 131024B: Enhanced Swift-XRT position
- GRB 131024B: Swift detection of a burst