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 180111A AROMA-N optical observation
- GRB 180111A: Insight-HXMT/HE observation
- Konus-Wind observation of GRB 180111A
- GRB 180111A CALET Gamma-Ray Burst Monitor detection
- GRB 180111A: AbAO optical observations
- GRB 180111A: Swift/UVOT Detection
- GRB 180111A: Swift-BAT refined analysis
- GRB 180111A: RATIR Optical and NIR Observations
- GRB 180111A: Swift-XRT refined Analysis
- GRB 180111A: AGILE/MCAL detection
- GRB180111A: Xinglong TNT possible optical detection
- GRB 180111A: Enhanced Swift-XRT position
- GRB 180111A: Swift detection of a burst with an optical counterpart