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"17 results found.
- GRB 161129A: 15 GHz upper limits from AMI
- GRB 161129A: GTC redshift of the likely host galaxy
- GRB 161129A: NOT optical observations and candidate host galaxy
- GRB 161129A: KWFC z-band photometry
- GRB 161129A: POLAR Detection
- GRB 161129A: Mondy optical observations
- GRB 161129A: ISON/UAFO optical observations
- GRB 161129A: MITSuME Okayama Ks-band Observation
- GRB 161129A: Swift-BAT refined analysis
- GRB 161129A: Fermi GBM Detection
- GRB 161129A: MITSuME Okayama Optical Observation
- GRB 161129A: Swift/UVOT Detection
- GRB 161129A: Tautenburg Ic-band observations
- GRB 161129A: TSHAO optical observations / possible afterglow+host galaxy
- GRB 161129A: Swift-XRT refined Analysis
- GRB 161129A: Enhanced Swift-XRT position
- GRB 161129A: Swift detection of a burst