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 140114A: optical upper limit
- GRB 140114A: NOT afterglow observations
- GRB 140114A: Continued RATIR Optical and NIR Observations
- GRB 140114A: MITSuME Okayama upper limits
- GRB 140114A: ROTSE-III Optical Limits
- GRB 140114A: Swift-XRT refined Analysis
- GRB 140114A: Swift-BAT refined analysis
- GRB 140114A: Swift/UVOT Upper Limits
- GRB 140114A: KAIT Optical Upper Limit
- GRB 140114A: Enhanced Swift-XRT position
- GRB 140114A: RATIR Optical and NIR Afterglow Detection
- GRB 140114A: P60 Observations
- GRB 140114A: Swift detection of a burst