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 060605 new redshift
- GRB 060605: NIR Observations
- GRB 060605, observations using an Integral Field Unit
- GRB 060605: VLA Observation
- GRB 060605: SkyNet Optical Limits
- GRB 060605, optical observations
- GRB 060605: RTT150 optical observations
- GRB 060605 BAT refined analysis
- GRB 060605: Xinglong TNT optical observations
- GRB 060605: Swift-XRT Team refined analysis
- SALT spectroscopy of GRB 060605
- GRB 060605: TNG optical observations
- GRB 060605: RTT150 optical observations
- GRB 060605: ROTSE-III Optical Counterpart
- GRB 060605: Swift detection of a burst with optical counterpart
- GRB 060605: ROTSE-III Detection of Optical Counterpart