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.
- IceCube-230707A: JCMT/SCUBA-2 submm observations
- IceCube-230707A : MAXI upper limit and NICER follow-up observation of Swift J1753.5-0127
- GRB 230707A: Swift/BAT-GUANO position correction
- IceCube-230707A: No candidates detected by Swift-XRT
- IceCube-230707A: No candidates from the Zwicky Transient Facility
- Fermi-LAT gamma-ray observations of IceCube-230707A
- IceCube-230707A: Upper limits from a search for additional neutrino events in IceCube
- GRB 230707A: Swift-XRT observations
- IceCube-230707A - IceCube observation of a high-energy neutrino candidate track-like event
- GRB 230707A: Fermi GBM Detection
- GRB 230707A: Swift ToO observations
- GRB 230707A: Swift/BAT-GUANO arcminute localization of a burst
- Fermi GRB 230707A: Global MASTER-Net observations report
- GRB 230707A: Fermi GBM Final Real-time Localization