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"16 results found.
- GRB 120116A, the review of the sky area in plate archives
- GRB 120116A: optical upper limit
- GRB 120116A: Swift/UVOT Upper Limits
- GRB 120116A: Swift-XRT refined Analysis
- GRB 120116A: Enhanced Swift-XRT position
- GRB 120116A: Mondy optical observations
- GRB 120116A: Gemini optical/IR candidate
- GRB 120116A: EVLA observations
- GRB 120116A: WHT optical observations
- GRB 120116A: Optical observations at Crni Vrh
- GRB 120116A: Swift-BAT refined analysis
- GRB 120116A: NOT observations
- GRB 120116A: IAC80 I-band observations
- GRB 120116A: Bassano Bresciano Observatory optical observations
- GRB 120116A: MASTER Early optical limit
- GRB 120116A: Swift detection of a burst