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"13 results found.
- GRB 140818B: TShAO optical upper limit
- GRB140818B, the review of the sky area in plate archives
- GRB 140818B: TLS observations
- GRB 140818B: ISON-Kislovodsk and ISON-Burakan optical upper limit
- GRB 140818B, Swift-BAT refined analysis
- GRB 140818B : Correction to GCN 16713
- GRB 140818B: Swift/UVOT Upper Limits
- GRB 140818B: Swift-XRT refined Analysis
- GRB 140818B: Fermi GBM detection
- GRB140818B : GROND afterglow candidate
- GRB 140818B: Enhanced Swift-XRT position
- GRB 140818B: OSN I-band afterglow candidate
- GRB 140818B: Swift detection of a burst