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 181213A: Swift/UVOT Observations
- GRB 181213A: Mondy optical observations
- GRB 181213A: continued TSHAO optical observations
- GRB 181213A:Insight-HXMT/HE detection
- GRB 181213A: AbAO optical observations
- GRB 181213A: HMM-0.5m, NEXT-0.6m, CNEOST-1m optical observations
- GRB 181213A: NOT optical observations
- GRB 181213A: Swift-XRT refined Analysis
- GRB 181213A: Enhanced Swift-XRT position
- GRB 181213A: Swift-BAT refined analysis
- GRB 181213A: GWAC-F60A upper limit
- GRB 181213A : TSHAO optical observations
- GRB 181213A: Swift-XRT observations
- GRB 181213A: BOOTES-5/JGT optical observations
- GRB 181213A: Swift detection of a burst