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"14 results found.
- GRB 100901A: TLS Observations: Break?
- GRB 060729: An update on the late-time Swift observations
- GRB 060729, SMARTS optical/IR observations
- GRB 060729: An update on the Swift XRT and UVOT observations
- GRB060806 is similar to previous activity of SGR1806-20
- GRB060729: ROTSE-III Observations of the Slow Optical Decay
- GRB 060729 redshift
- GRB 060729: Swift/UVOT Detections
- GRB 060729: Refined analysis of the Swift-BAT burst
- GRB 060729: Swift-XRT refined analysis
- GRB 060729 : Planned XMM-Newton observation
- GRB 060729: Swift/UVOT Observations
- GRB 060729: ROTSE-III Detection of Optical Counterpart
- GRB 060729: Swift detection of a burst with an UVOT optical counterpart