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"16 results found.
- IceCube-240123A: Upper limits from a search for additional neutrino events in IceCube
- GRB 240123A: Glowbug gamma-ray detection
- GRB 240123A: GRBAlpha detection
- Fermi-LAT gamma-ray observations of IceCube-240123A
- GRB 240123A: further SAO RAS optical observations
- GRB 240123A: Swift-BAT refined analysis
- GRB 240123A: Mondy continued optical observations and the PL decay index
- GRB 240123A: SAO RAS optical observations
- GRB 240123A : MITSuME Akeno optical afterglow candidate detection
- GRB 240123A: Enhanced Swift-XRT position
- GRB 240123A: Swift-XRT refined Analysis
- Fermi GBM Sub-Threshold Detection of GRB 240123A
- GRB 240123A: Mondy continued optical observations + correction of the GRB name in GCN 35605
- GRB 240123A: Mondy optical afterglow observations
- IceCube-240123A - IceCube observation of a high-energy neutrino candidate track-like event
- GRB 240123A: Swift detection of a burst with a possible optical counterpart