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.
- Radio observations of GRB 060719
- GRB 060719: TORTOREM optical upper limits
- GRB 060719: near-infrared afterglow
- GRB 060719: correction to the coordinates reported in GCN 5347
- GRB 060719: Swift/UVOT Upper Limits
- GRB 060719: VLT/ISAAC observations
- GRB 060719: Refined analysis of the Swift-BAT burst
- GRB 060719: XRT refined analysis
- GRB 060719: further analysis of VLT observations
- GRB 060719: optical limit by Pi-of-the-Sky
- GRB 060719: prompt PROMPT observations
- GRB060719: REM NIR Observations
- GRB 060719: Continued LCO optical observations
- GRB 060719: VLT observations
- GRB 060719: LCO optical observations
- GRB 060719: Swift detection of a burst