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 251014A: Swift-XRT observations
- Upper limits from a search for additional neutrino events in IceCube
- Fermi-LAT Gamma-ray Observations of IceCube-251014A
- GRB 251014A: Swift-BAT refined analysis
- IceCube-251014A - IceCube observation of a high-energy neutrino candidate track-like event
- GRB 251014A: PRIME near-infrared upper limits
- GRB 251014A: Glowbug gamma-ray detection of a likely short burst
- GRB 251014A: VLT/FORS2 Optical Observation
- GRB 251014A: DDOTI Upper Limit
- GRB 251014A: SAO RAS optical upper limit
- GRB 251014A: Fermi GBM Observation
- Swift GRB 251014A: Global MASTER-Net observations report
- GRB 251014A: Swift detection of a possibly-short burst
- GRB 251014A: Fermi GBM Final Real-time Localization