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.
- FACT follow-up of ANTARES-Fermi 191011A
- ANTARES 191011A: MASTER optical observation befor and after trigger
- ANTARES 191011A: AMON + ANTARES Identification of a High-Energy Neutrino + Fermi LAT Coincidence
- GRB 191011A: Swift-BAT refined analysis
- GRB 191011A: Swift/UVOT Detection
- GRB 191011A: RATIR Optical and NIR Observations
- GRB 191011A: Fermi GBM observation
- GRB 19011A: Optical Afterglow Detection with LCO
- GRB 191011A: Swift-XRT refined Analysis
- GRB 191011A: MASTER OT retraction.
- GRB 191011A: Enhanced Swift-XRT position
- GRB 191011A: correction of reported magnitudes
- GRB 191011A: BALROG localization (Fermi Trigger 592461363 / GRB 191011192)
- GRB 191011A: GROND Detection of the Optical/NIR afterglow
- GRB 191011A: VLT X-shooter redshift from RRM Observations
- GRB 191011A: Swift detection of a burst with an optical counterpart
- GRB 191011A: Fermi GBM Final Real-time Localization