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 160203A: RATIR Upper Limits
- GRB 160203A: MITSuME Akeno optical upper limits
- GRB 160203A: Zadko observatory - Gingin optical detection
- GRB 160203A: Swift-BAT refined analysis
- GRB 160203A: TSHAO optical observations
- GRB 160203A: RATIR Optical Observations
- GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
- GRB 160203A: Swift-XRT refined Analysis
- GRB 160203A: TAROT La Silla - TAROT Calern - Zadko observations
- GRB 160203A: Swift/UVOT Detection
- GRB 160203A: Enhanced Swift-XRT position
- The bright GRB160203A: X-shooter spectroscopy and redshift
- GRB 160203A: LCOGT-Cerro Tololo optical afterglow confirmation
- GRB 160203A: GROND Afterglow Candidate
- GRB 160203A: Swift detection of a burst