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"19 results found.
- GRB 141212A: GMG observation limit
- GRB 141212A iTelescope observation
- GRB 141212A: Zadko observatory - Gingin optical observations
- GRB 141212A: Swift/UVOT Upper Limits
- GRB 141212A: VLA upper limit
- GRB 141212A: Gemini-N spectroscopy and photometry
- GRB 141212A: Swift-BAT refined analysis
- GRB 141212A: MITSuME Okayama upper limits
- GRB 141212A: Swift-XRT refined Analysis
- GRB 141212A: extended object within the XRT error circle
- GRB141212A: xinglong TNT upper limit
- GRB 141212A: Khureltogot optical upper limit
- GRB 141212A: 1.23m CAHA I-band observations
- GRB 141212A: Enhanced Swift-XRT position
- GRB 141212A: Correction to GCN 17162
- GRB 141212A: MASTER early optical observations
- GRB 141212A: Skynet R-COP Observations
- GRB 141212A: MITSuME Akeno upper limits
- GRB 141212A: Swift detection of a short burst