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.
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"
12 results found.
- GRB 141005A: iTelescope.Net T21 Optical Observation
- GRB 141005A: Additional P60 imaging and afterglow confirmation
- GRB 141005A: GROND observations
- Konus-Wind observation of GRB 141005A
- GRB 141005A: Swift-XRT refined Analysis
- GRB 141005A: Swift/UVOT Upper Limits
- GRB 141005A: Swift-BAT refined analysis
- GRB 141005A: Fermi GBM Detection
- GRB 141005A: Enhanced Swift-XRT position
- GRB 141005A: RATIR Optical Observations
- GRB 141005A: P60 probable afterglow deteaction
- GRB 141005A: Swift detection of a burst