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 241006A: VIRT Optical Upper Limit
- GRB 241006A: ATCA Radio Upper Limits
- IceCube-241006A: Upper limits from a search for additional neutrino events in IceCube
- Fermi-LAT Gamma-ray Observations of IceCube-241006A
- GRB 241006A: Swift-BAT refined analysis
- IceCube-241006A: No candidates from the Zwicky Transient Facility
- GRB 241006A: GRANDMA optical upper limits
- GRB 241006A: Swift-XRT refined Analysis
- GRB 241006A: PRIME near-infrared upper limits
- GRB 241006A: Swift/UVOT Upper Limits
- GRB 241006A: SVOM/VT follow-up and optical upper limit
- GRB 241006A: Enhanced Swift-XRT position
- IceCube-241006A - IceCube observation of a high-energy neutrino candidate track-like event
- GRB 241006A: Swift detection of a burst