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"15 results found.
- GRB 060801: XRT/SDSS Frame Offset and Refined XRT Position
- GRB 060108: IR observations of afterglow
- GRB 060108: further analysis of VLT images
- GRB 060108: Evidence for an XRT Position Offset
- GRB 060108: VLT K-band observations
- GRB 060108: z-band imaging from Gemini-North
- GRB 060108: ISAS early observations and near IR upper limit
- GRB 060108: early UKIRT K-band observations
- GRB 060108: a dark burst?
- GRB 060108: Refined XRT analysis
- GRB 060108: VLT J-band observations
- GRB 060108: Mitsume optical observations
- GRB 060108: Swift/UVOT upper limits
- GRB 060108: Refined analysis of the Swift-BAT burst
- GRB 060108: Swift XRT position