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').
15 results found.
- GRB 250314A: ALMA detection
- GRB 250314A: VLA detection
- GRB 250314A: Keck/NIRC2 J-band upper limit
- GRB 250314A: ATCA radio upper limits
- GRB 250314A: REM optical/NIR upper limits
- GRB 250314A: SVOM/GRM analysis
- GRB 250314A: GTC z-band upper limit and updated photo-z ~ 7.27
- GRB 250314A: EP-FXT afterglow detection
- GRB 250314A: Swift/UVOT Upper Limits
- GRB 250314A: Swift XRT Detection
- GRB 250314A: VLT/X-shooter dropout, redshift z ~ 7.3
- SVOM/MXT upper limit on GRB 250314A
- GRB 250314A: SVOM/VT upper limit
- GRB 250314A: NOT near-infrared candidate counterpart
- GRB 250314A: SVOM detection of a burst