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"14 results found.
- Skynet/Dolomiti observations of GRB 110928A
- Skynet observations of GRB 110928A
- GRB 110928A: RAPTOR Limits During Gamma-ray Emitting Interval
- GRB 110928A: Swift/UVOT Upper Limits
- GRB 110928A: Swift-XRT refined Analysis
- GRB 110928A: Enhanced Swift-XRT position
- GRB 110928A: P60 Observations
- GRB 110928A: Further PAIRITEL NIR Observations
- GRB 110928A: Swift-BAT refined analysis
- GRB 110928A: Swift-XRT observations
- GRB 110928A: Swift/UVOT finding chart observation
- GRB 110928A: PAIRITEL NIR Observations
- GRB 110928A: ROTSE-III Optical Limits
- GRB 110928A: Swift detection of a burst