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').
8 results found.
- GRB 210724A: Early CAHA 2.2m limit
- GRB 210724A: Corrected Swift-XRT enhanced position
- GRB 210724A: Swift/UVOT Upper Limits
- GRB 210724A: Zeiss-1000 of Koshka observatory, optical upper limit
- GRB 210724A: Swift-XRT refined Analysis
- GRB 210724A: Swift-BAT refined analysis
- GRB 210724A: Afterglow candidate from OSIRIS/GTC
- GRB 210724A: Swift detection of a burst