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 160327A: 15 GHz upper limits from AMI
- GRB 160327A: Continued RATIR Optical and NIR Observations
- GRB 160327A: Early RAPTOR Limits
- GRB 160327A: JCMT SCUBA-2 sub-mm observation
- GRB 160327A: Imaging and spectroscopy from GTC
- GRB 160327A: Continued RATIR Optical and NIR Observations
- GRB 160327A: KAIT optical afterglow confirmation
- GRB 160327A: Mondy optical upper limit
- GRB 160327A: Swift-BAT refined analysis
- GRB 160327A: Swift/UVOT Upper Limits
- GRB 160327A: Swift-XRT refined Analysis
- GRB 160327A: Enhanced Swift-XRT position
- GRB 160327A: RATIR Optical and NIR Afterglow Detection
- GRB 160327A: Swift detection of a burst