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"14 results found.
- GRB 140430A: MITSuME Akeno upper limits
- GRB 140430A: iTelescope.Net T16 Optical Observation
- GRB 140430A: r'-band STELLA-I observations
- GRB 140430A: BVR-band IAC80 observations
- GRB 140430A: Further VATT Optical Observations
- GRB 140430A: Swift-BAT refined analysis
- GRB 140430A: Swift/UVOT Observations
- GRB 140430A: Swift-XRT refined Analysis
- GRB 140430A: VATT Optical Observations
- GRB 140430A: Enhanced Swift-XRT position
- GRB 140430A: VLT/X-shooter redshift
- GRB 140430A: NOT optical observations
- GRB 140430A : Liverpool Telescope optical afterglow observations
- GRB140430A: Swift detection of a burst with an optical counterpart