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"19 results found.
- Fermi LAT Upper Limits on GRB 091010
- Konus-Wind observations of GRB 091020 (correction to GCN 10057)
- Konus-Wind observations of GRB 091010
- Fwd: GRB 091003: Possible Supernova Component Retraction
- GRB 091010: optical obsevation
- GRB 091010: optical afterglow candidate rejection
- GRB 091010: Swift-XRT refined analysis
- GRB 091010: Suzaku WAM observation of the prompt emission
- GRB 091010: AGILE-MCAL measurement and GRID upper limit
- GRB 091010: Fermi GBM observation
- GRB 091010: Faulkes Telescope North observations
- GRB 091010: RXTE detection
- Konus-Wind observations of GRB 091010
- GRB 091010: Enhanced XRT position
- GRB 091010 optical upper limits
- GRB 091010: GROND afterglow candidate
- GRB 091010: Swift/UVOT Upper Limits
- GRB 091010: Swift-XRT position
- SuperAGILE GRB is 091010 and not 090910