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 161108A: 15 GHz upper limits from AMI
- GRB 161108A: continued TSHAO optical observations
- GRB 161108A: MITSuME Okayama upper limits
- GRB 161108A: TSHAO optical observations
- GRB 161108A: Swift/UVOT Upper Limits
- GRB 161108A: TAROT Calern observatory optical observations
- GRB 161108A, Swift-BAT refined analysis
- GRB 161108A: NOT redshift
- GRB 161108A: RATIR Afterglow Confirmation
- GRB 161108A: Swift-XRT refined Analysis
- GRB 161108A: Enhanced Swift-XRT position
- GRB 161108A: NOT candidate afterglow
- GRB 161108A: Swift detection of a burst