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').
18 results found.
- IceCube 200117A: No significant detection in HAWC
- IceCube-200109A: Candidate Counterparts from the Zwicky Transient Facility
- Fermi-LAT Gamma-ray Observations of IceCube-200109A and detection of a possible new gamma-ray source, Fermi J1055.8+1034
- GRB 200109A: Insight-HXMT/HE detection
- IceCube 200109A: No significant detection in HAWC
- IceCube-200109A: Upper limits from a search for additional neutrino events in IceCube
- IceCube-200109A: Swift-XRT and UVoT Follow-up Observations
- ANTARES 200108A: No detection by Swift-XRT
- IceCube-200109A: INTEGRAL was inactive at the time of the event
- IceCube-200109A: Upper limits from Fermi-GBM Observations
- IceCube-200109A: IceCube observation of a high-energy neutrino candidate event
- GRB 200109A: Swift-BAT refined analysis
- GRB 200109A: Swift/UVOT Upper Limits
- GRB 200109A: Fermi GBM observation
- GRB 200109A: Swift-XRT refined Analysis
- GRB 200109A: Enhanced Swift-XRT position
- GRB 200109A: Swift detection of a burst
- GRB 200109A: Fermi GBM Final Real-time Localization