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.
Lucene Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"16 results found.
- GRB 130610A: TAROT La Silla observatory optical observations
- GRB 130610A: CrAO optical observations
- GRB 130610A: iTelescope T21 optical observations
- GRB 130610A: ISON-NM optical observations
- GRB 130610A: Swift/UVOT Observations
- GRB 130610A: Fermi GBM Observation
- GRB 130610A: LOAO BVR Observation
- GRB 130610A: Swift-XRT refined Analysis
- GRB 130610A: Enhanced Swift-XRT position
- GRB 130610A, Swift-BAT refined analysis
- GRB 130610A: VLT/UVES redshift
- GRB 130610A: P60 Observations
- GRB 130610A: PAIRITEL NIR Afterglow Observations
- GRB 130610A: Skynet/PROMPT detection of the optical afterglow
- GRB 130610A - Liverpool Telescope Optical Afterglow Confirmation
- GRB 130610A: Swift detection of a burst with an optical counterpart