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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- GRB 150211A: ROTSE-III Upper Optical Limit
- Konus-Wind observation of GRB 150211A
- GRB 150211A iTelescope observation
- GRB 150211A: Swift/UVOT Upper Limits
- GRB 150211A: Swift-BAT refined analysis
- GRB 150211A: KAIT Optical Upper Limit
- GRB 150211A: Mondy optical upper limit
- GRB 150211A: Swift-XRT refined Analysis
- GRB 150211A: RATIR Optical and NIR Observations
- GRB 150211A: No afterglow detection in the Swift/UVOT initial observation
- GRB 150211A: Swift-XRT observations
- GRB 150211A: Swift detection of a burst
- GRB 150211A: MASTER early optical observations