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').
32 results found.
- GRB 211023A: OAJ Bright Afterglow Confirmation
- GRB 181201A: photometric signature of the SN
- GRB 181201A: continued optical observations in Mondy
- GRB 181201A: VLA detection
- GRB 181201A: ALMA detection of a fading mm afterglow
- GRB 181201A: continued optical observations in TSHAO and Chilesope
- GRB 181201A: continued optical observations in TSHAO
- GRB 181201A: Continued GROND observations show that afterglow is still bright
- GRB181201A: GOTO optical observations
- GRB 181201A: AstroSat CZTI detection
- GRB 181201A: Swift/UVOT Detection
- GRB 181201A: continued optical observations in SAAO and Chilesope
- Konus-Wind observation of GRB 181201A
- GRB 181201A: Further COATLI Optical Monitoring
- GRB 181201A: Insight-HXMT/HE detection
- GRB 181201A: VLT/FORS2 tentative spectroscopic redshift
- GRB 181201A: GROND detection of the afterglow and redshift upper limit of z < 3
- GRB 181201A: optical observations in Chilescope observatory
- GRB 181201A: Global MASTER-Net prompt optical descovery and afterglow observations
- GRB 181201A: COATLI Optical Detection
- GRB 181201A: Fermi-LAT detection
- GRB 181201A: Zeiss-1000/CrAO optical observations
- GRB 181201A: NOT optical observations
- GRB 181201A: optical observations in SAAO
- GRB 181201A MASTER-Net OT continued observation
- GRB 181201A: iTelescope optical afterglow detection
- GRB 181201A: Swift-XRT afterglow detection
- GRB 181201A: Swift ToO observations
- GRB 181201A: Swift-XRT afterglow
- GRB 181201A: likely Swift/XRT afterglow
- GRB 181201A MASTER-Net OT detection
- GRB 181201A: a long GRB detected by INTEGRAL