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"14 results found.
- GRB 131229A: Suzaku WAM observation of the prompt emission
- GRB 131229A: Fermi GBM detection
- Konus-Wind observation of GRB 131229A
- GRB 131229A: CARMA 3mm observations
- GRB 131229A: Magellan upper limit
- GRB 131229A: GROND observations
- GRB 131229A: Swift-BAT refined analysis
- GRB 131229A: Swift-XRT refined Analysis
- GRB 131229A: Swift/UVOT Upper Limits
- GRB 131229A: Enhanced Swift-XRT position
- GRB 131229A: Deep Gemini-South Imaging
- GRB 131229A: KAIT Optical Upper Limit
- GRB 131229A: P60 nondetection
- GRB 131229A: Swift detection of a burst