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"19 results found.
- GRB 130612A: Swift-BAT refined analysis
- GRB 130612A: Continued Skynet/PROMPT/GORT/DSO observations
- GRB 130612A: Fermi GBM observation
- GRB 130612A: iTelescope T21 optical observations
- GRB 130612A: ISON-NM optical observations
- GRB 130612A: MITSuME Okayama upper limits
- GRB 130612A: Swift/UVOT Detection
- GRB 130612A: Swift-XRT refined Analysis
- GRB 130612A: Zadko observatory - Gingin optical observations
- GRB 130612A: Enhanced Swift-XRT position
- GRB 130612A: TAROT La Silla observatory optical observations
- GRB 130612A: VLT/X-shooter redshift
- GRB 130612A: RATIR Optical Observations
- GRB 130612A: P60 Observations
- GRB 130612A: NOT optical observations
- GRB 130612A: Skynet/PROMPT detection of the optical afterglow
- GRB 130612A: PAIRITEL NIR Afterglow Observations
- GRB 130612A: Liverpool Telescope Afterglow detection
- GRB 130612A: Swift detection of a burst with an optical counterpart