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"16 results found.
- GRB 140129A: Mondy optical observations
- GRB 140129A: 5 GHz VLA observations
- GRB 140129A: Continued RATIR Optical and NIR Observations
- GRB 140129A: Khureltogot optical limit
- GRB 140129A: Continued RATIR Optical and NIR Observations
- GRB 140129A: CARMA early observations
- GRB 140129A: P200 spectroscopy
- GRB 140129A: MITSuME Okayama upper limits
- GRB 140129A, Swift-BAT refined analysis
- GRB 140129A: Swift/UVOT Observations
- GRB 140129A: Swift-XRT refined Analysis
- GRB 140129A: Enhanced Swift-XRT position
- GRB 140129A: ROTSE-III Detection of Optical Counterpart
- GRB 140129A: RATIR Optical and NIR Observations
- GRB 140129A: P60 optical afterglow detection
- GRB 140129A: Swift detection of a burst with an optical afterglow