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').
22 results found.
- GRB 230812B: rest-frame energetics from Konus-Wind observation
- GRB 220627A: MeerKAT radio observations
- GRB 220627A: ATCA detection of radio counterpart
- GRB 220627A: AstroSat CZTI detection
- GRB 220627A, GROND observations
- GRB 220627A: Swift/UVOT Upper Limits
- Fermi-LAT Gamma-ray Observations of IceCube-220627A
- IceCube-220629A - IceCube observation of a high-energy neutrino candidate track-like event
- IceCube-220627A: No significant detection in HAWC
- GRB 220627A: Swift-XRT afterglow detection
- Konus-Wind detection of GRB 220627A
- IceCube-220627A: Upper limits from a search for additional neutrino events in IceCube
- GRB 220627A: VLT MUSE redshift
- GRB 220627A: MeerLICHT candidate optical afterglow
- GRB 220627A: Fermi GBM Detection of a possible Lensed or Ultra-long GRB
- GRB 220627A: Swift/BAT-GUANO detection outside the coded FOV
- GRB 220627A: Swift ToO observations
- GRB 220627A: Fermi-LAT detection
- GRB 220627A: MeerLICHT detection of two afterglow candidates
- Fermi GRB 220627A: Global MASTER-Net observations report
- GRB 220627A: Fermi GBM Final Real-time Localization
- IceCube-220627A - IceCube observation of a high-energy neutrino candidate track-like event