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"22 results found.
- GRB 121011A: optical observations
- GRB 121011A: early optical light curve
- GRB 121011A Suzaku WAM observation of the prompt emission
- PdB IRAM observation of GRB 121011A
- GRB 121011A: WSRT radio observation
- GRB 121011A: optical observations
- GRB 121011A: Swift/UVOT Detection
- GRB 121011A: NOT redshift retraction
- GRB 121011A: misprint in GCNC 13854
- GRB 121011A: Fermi GBM observation
- GRB 121011A: Fermi-LAT detection of a burst
- GRB 121011A: Swift-XRT refined Analysis
- GRB 121011A: NOT optical observations
- GRB 121011A: optical observations
- GRB 121011A: MASTER-Net bell light curve
- GRB 121011A: TNG optical observations
- GRB 121011A, Swift-BAT refined analysis
- GRB 121011A: Enhanced Swift-XRT position
- Planned XMM-Newton and IRAM observation of GRB 121011A
- GRB 121011A: MASTER-Net early OT light curve
- GRB 121011A: MITSuME Okayama Optical Observation
- GRB 121011A: Swift detection of a burst with optical afterglow