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"17 results found.
- GRB 131014A: RATIR Optical/NIR Afterglow Retraction
- IPN Triangulation of GRB 131014A
- GRB 131014A: XRT position information
- GRB 131014A: Suzaku WAM observation of the prompt emission
- GRB 131014A: GROND observations
- GRB 131014A: RATIR Optical/NIR Afterglow Confirmation
- GRB 131014A: Swift-XRT refined Analysis
- GRB 131014A: Swift/UVOT Upper Limits
- GRB 131014A: RATIR Optical and NIR Observations
- GRB 131014A: Enhanced XRT position
- Konus-Wind observation of GRB 131014A
- GRB 131014A: NOT afterglow candidate
- GRB 131014A: Nanshan optical observations
- GRB 131014A: Swift detection of a possible X-ray afterglow
- GRB 131014A Tiled Swift observations
- GRB 131014A: Fermi-LAT detection
- GRB 131014A: Fermi GBM detection