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"16 results found.
- GRB 111029A: RAPTOR Limits During the Gamma-ray Emitting Interval
- GRB 111029A: SAO RAS optical limits
- GRB 111029A: Super-LOTIS early limits
- GRB111029A: MITSuME Ishigakijima Optical Upper Limits
- GRB 111029A: TNT optical upper limit, Correction to GCN 12503
- GRB 111029A: Swift-XRT refined Analysis
- GRB 111029A: PAIRITEL NIR Upper Limits
- GRB 111029A: Swift/UVOT Upper Limits
- GRB 111029A: KAIT optical limits
- GRB 111029A: Swift-BAT refined analysis
- GRB 111029A: TNT optical upper limit
- GRB 111029A: Enhanced Swift-XRT position
- GRB 111029A: Faulkes Telescope North observations
- GRB 111029A: optical upper limit
- GRB 111029A: ROTSE-III Optical Limits
- GRB 111029A: Swift detection of a burst