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 080320 : Faulkes Telescope North Observations
- GRB 080320, Swift-BAT refined analysis
- GRB 080320: Swift XRT refined analysis
- GRB 080320: Early Super-LOTIS Observations
- GRB 080320: J detection with FLAMINGOS
- GRB 080320: optical limit
- GRB 080320: Gemini-N optical afterglow
- GRB 080320: SDSS source and Gemini-N observations
- GRB 080320: Enhanced Swift-XRT position
- GRB 080320: optical limit from IAC80
- GRB 080320 - SDSS Pre-Burst Observations
- GRB 080320: Swift detection of a burst
- GRB 080320: ROTSE-III Optical Limits