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"12 results found.
- GRB 160530A: discovery with the Compton Spectrometer and Imager
- Radio observation of GRB 080516 with ATCA
- GRB 080516: TAROT La Silla observatory optical observations
- GRB 80516: Swift/UVOT Observations
- GRB 080516, GROND further analysis
- GRB 080516, GROND 2nd epoch observations
- GRB 080516, GROND observations
- GRB 080516, SMARTS optical/IR observations
- GRB 080516: Swift-XRT Team refined analysis
- GRB 080516, Swift-BAT refined analysis
- GRB 080516: Enhanced Swift-XRT position
- GRB 080516: Swift detection of a burst