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"16 results found.
- GRB 130912A: AAO optical upper limit
- GRB 130912A: Swift/UVOT Upper Limits
- GRB 130912A: 5.8 GHz VLA upper limit
- GRB 130912A: RATIR Optical and NIR Upper Limits
- Konus-Wind observation of GRB 130912A
- GRB 130912A: WHT confirmation of optical counterpart
- GRB 130912A: P60 Observations
- GRB 130912A: Swift-XRT refined Analysis
- GRB 130912A: Fermi GBM detection
- GRB 130912A: Skynet DSO-14/Yerkes-41/PROMPT-CTIO observations
- GRB 130912A: Enhanced Swift-XRT position
- GRB 130912A, Swift-BAT refined analysis
- GRB 130912A: REM optical/NIR upper limits
- GRB 130912A: GROND observations
- GRB 130912A: KAIT optical upper limit
- GRB 130912A: Swift detection of a short burst