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"16 results found.
- GRB060313: Radio Observations
- GRB 060313: early afterglow NIR upper limits with REM
- Konus-Wind observation of GRB 060313
- GRB060313: SSO 40inch Observations
- GRB 060313: Further analysis of the Swift-BAT bright short hard burst
- GRB 060313: PROMPT Observations
- GRB 060313: Swift/UVOT Observations
- GRB060313:Gemini South Observations
- GRB 060313: Swift-XRT team refined analysis
- GRB060313: optical observations of the afterglow candidate
- GRB 060313: Refined analysis of the Swift-BAT bright short hard burst
- GRB 060313, SMARTS optical counterpart?
- GRB 060313: Possible optical counterpart
- GRB 060313: Swift XRT position
- GRB 060313, SMARTS optical/IR observations
- GRB 060313: Swift-BAT detection of a bright short hard burst