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').
23 results found.
- GRB 240809A: Mondy and AbAO Optical Observations
- GRB GRB 240809A: Osservatorio Astronomico "Nastro Verde" optical observations: detection of an optical counterpart
- GRB 240809A: Correction to the VLA source position in GCN 37158
- GRB 240809A: ATA radio non-detection
- GRB 240809A : RAPAS follow-up observations
- GRB 240809A: VLA detection
- GRB 240809A: ALMA detection
- GRB 240809A: Swift-BAT refined analysis
- Konus-Wind detection of GRB 240809A
- GRB 240809A: REM detection of the optical afterglow
- GRB 240809A: Bassano Bresciano Observatory optical observations
- GRB 240809A: Conclusive redshift from VLT
- GRB 240809A: KAIT optical observations
- GRB 240809A: GIT afterglow observations
- GRB 240809A: Swift/UVOT Detection
- GRB 240809A: Tentative redshift from NOT
- GRB 240809A: Swift-XRT refined Analysis
- Swift GRB 240809A: Global MASTER-Net observations report
- GRB 240809A: JinShan optical observations
- GRB 240809A: Enhanced Swift-XRT position
- GRB 240809A: Skynet & Photon Ranch Optical Afterglow Observations
- GRB 240809A: SVOM/GRM observation
- GRB 240809A: Swift detection of a burst with a bright optical counterpart