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').
20 results found.
- GRB 241029A: GRBAlpha detection
- GRB 241029A: COLIBRI Detection of the Optical Counterpart
- GRB 241029A: LCO optical detection
- GRB 241029A: SVOM/VT optical afterglow observations
- GRB 241029A: GROWTH-India Telescope optical follow up
- GRB 241029A: SAO RAS optical observations
- GRB 241029A: GTC/OSIRIS+ spectroscopic redshift z=1.072
- MISTRAL@OHP photometric and spectroscopic observations of GRB 241029A
- GRB 241029A: Swift-XRT observations
- GRB 241029A: Fermi GBM Observation
- GRB 241029A: AKO Optical Afterglow Detection
- GRB 241029A: GOTO optical afterglow detection
- GRB 241029A: MASTER early optical counterpart detection
- GRB 241029A: Xinglong-2.16m optical afterglow confirmation
- GRB 241029A: Mephisto observations
- GRB 241029A: TRT optical afterglow candidate detection
- GRB 241029A: Swift ToO observations
- GRB 241029A: SVOM/GRM observation
- GRB 241029A : Detection and localization of a bright long GRB by SVOM/ECLAIRs
- GRB 241029A: Fermi GBM Final Real-time Localization