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').
25 results found.
- GRB 210306A: LBT observations of the likely host galaxy
- GRB 210306A: GIT optical follow-up
- GRB 210306A: HCT optical upper limit
- GRB 210306A: LBT observations
- GRB 210306A: Tautenburg observations
- Konus-Wind detection of GRB 210306A
- GRB 210306A: Early Spectroscopy of the Optical Afterglow
- GRB 210306A: Swift/UVOT Detection
- GRB 210306A: continued Mondy optical observations
- GRB 210306A: Swift-XRT refined Analysis
- GRB 210306A: continued Mondy optical observations
- GRB 210306A: 1.3m DFOT observations
- GRB 210306A: Swift-BAT refined analysis
- GRB 210306A: Mondy optical observations
- GRB 210306A: MITSuME Akeno optical observation
- GRB 210306A: NEXT optical observations
- Swift GRB 210306A: Global MASTER-Net observations report
- GRB 210306A: Fermi GBM observation
- GRB 210306A: Tautenburg observations
- GRB 210306A: iTelescope T24 optical observations
- GRB 210306A: Fermi-LAT detection
- GRB 210306A: LCO Optical Afterglow Detection
- GRB 210306A: iTelescope optical afterglow observations
- GRB 210306A: DDOTI Afterglow Confirmation
- GRB 210306A: Swift detection of a burst with a bright optical counterpart