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"13 results found.
- GRB 160712A: Swift-BAT refined analysis
- GRB 160712A: Further GROND observations
- GRB 160712A: Swift/UVOT Upper Limits
- GRB 160712A: RATIR Optical and NIR Observations
- Konus-Wind observation of GRB 160712A
- GRB 160712A: GROND observations
- GRB 160712A: Swift-XRT refined Analysis
- GRB 160712A: Skynet R-COP observations
- GRB 160712A: Enhanced Swift-XRT position
- GRB 160712A: Initial Swift/UVOT observations
- GRB 160712A: Swift-XRT observations
- GRB 160712A: Global MASTER-Net optical observation
- GRB 160712A: Swift detection of a burst