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.
- GRB 161017A: 15 GHz upper limits from AMI
- Konus-Wind observation of GRB 161017A
- GRB161017A: NOEMA detection of the millimetre afterglow
- GRB 161017A: LT optical observations
- GRB 161017A: TNG spectroscopy and redshift confirmation
- GRB 161017A: GTC additional spectroscopy and refined redshift
- GRB 161017A: Swift-BAT refined analysis
- GRB 161017A: Lomonosov Gamma Ray and MASTER Optical prompt observations
- GRB 161017A: Swift/UVOT Detection
- GRB 161017A: Swift-XRT refined Analysis
- GRB 161017A: TNG optical observations
- GRB 161017A: MITSuME Akeno Optical Observation
- GRB 161017A: Redshift from GTC
- GRB 161017A: Fermi GBM observation
- GRB 161017A: Enhanced Swift-XRT position
- GRB 161017A: Swift detection of a burst with a bright optical afterglow