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 260111A: COLIBRÍ fading of the optical counterpart candidate
- Fermi-LAT Gamma-ray Observations of IceCube-260111A
- IceCube-260111A: Upper limits from a search for additional neutrino events in IceCube
- GRB 260111A: Swift-XRT observations
- GRB 260111A: COLIBRÍ optical afterglow candidate
- GRB 260111A: GECAM-B observation of a burst
- GRB 260111A: Fermi GBM Observation
- GRB 260111A: GOTO optical upper limits
- GRB 260111A: Swift ToO observations
- GRB 260111A: Swift/BAT-GUANO arcminute localization of a burst
- IceCube-260111A - IceCube observation of a high-energy neutrino candidate track-like event
- IceCube Alert 260111A: Global MASTER-Net observations report
- Fermi GRB 260111A: Global MASTER-Net observations report
- GRB 260111A: Fermi GBM Final Real-time Localization