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.
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
23 results found.
- GRB 220514A: KAIT Optical Afterglow Confirmation
- GRB 220408A: HCT optical upper limit
- GRB 220408A: GRANDMA observations
- GRB 220408A: Lowell Discovery Telescope Optical Observations
- GRB 220408A: Swift-BAT refined analysis
- GRB 220408A: RATIR Optical and NIR Observations
- GRB 220408A: 1.3m DFOT Optical upper limit
- GRB 220408A: LOAO, DOAO, and, SAO optical upper limit
- GRB 220408A: redshift lower limit estimating
- GRB 220408A: NOT optical observations and archival detection
- GRB 220408A: LCO Optical Afterglow Detection
- GRB 220408A: Swift-XRT refined Analysis
- GRB 220408A: BOOTES-5/JGT optical afterglow detection
- GRB 220408A: GIT optical upper limit
- GRB 220408A: Fermi GBM observation
- GRB 220408A: Swift/UVOT Detection
- GRB 220408A: Xinglong-2.16m optical upper limit
- GRB 220408A: Enhanced Swift-XRT position
- Chandra upper limit at the location of GRB 220408A
- GRB 220408A: KAIT Optical Observations
- Fermi GRB 220408A: Global MASTER-Net observations report
- GRB 220408A: Swift detection of a burst with an optical counterpart, possibly associated with M51
- GRB 220408A: Fermi GBM Final Real-time Localization