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').
Advanced Search
To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"15 results found.
- GRB 251016A: TERI Gamma-ray detection of a short burst
- Konus-Wind detection of GRB 251016A (short/hard)
- GRB 251016A: SVOM/ECLAIRs refined analysis
- GRB 251016A: Fermi GBM Observation
- GRB 251016A: HXMT/HE detection
- GRB 251016A: Swift-XRT afterglow detection
- GRB 251016A: Swift/UVOT Detection
- GRB 251016A: VLT/FORS2 Optical Observation
- GRB 251016A: AstroSat CZTI detection of a short burst
- GRB 251016A: CALET Gamma-Ray Burst Monitor detection
- GRB 251016A: BOOTES-6/DPRT optical upper limit
- GRB 251016A: Glowbug gamma-ray detection of a short burst
- Fermi GRB 251016A: Global MASTER-Net observations report
- GRB 251016A: Fermi GBM Final Localization
- GRB 251016A: SVOM detection of a short burst