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"13 results found.
- Radio upper limit on the GRB 140713A with the GMRT
- GRB 140713A: AMI 15 GHz detection
- GRB 140713A: 10.4-m GTC deep optical observation
- GRB 140713A: CARMA mm detection
- GRB 140713A: Fermi GBM detection
- GRB 140713A: Swift-XRT refined Analysis
- GRB 140713A: Swift/UVOT Upper Limits
- GRB 140713A: NOT upper limits
- GRB 140713A : Xinglong TNT upper limit
- GRB 140713A: Enhanced Swift-XRT position
- GRB 140713A: Swift-BAT refined analysis
- GRB 140713A: T100 observations
- GRB 140713A: Swift detection of a burst