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.
- GRB 170214A: Swift-XRT afterglow detection
- GRB 170214A: Mondy optical upper limit
- GRB 170214A: VLT/X-shooter spectroscopy and tentative redshift
- GRB170214A: RATIR Optical and NIR Afterglow Confirmation
- GRB 170214A: GROND detection in all bands
- GRB 170214A: NOT optical afterglow confirmation
- GRB 170214A: Swift/UVOT Upper Limits
- GRB170214A: RATIR Optical and NIR Observations
- GRB 170214A: Swift-XRT observations
- Konus-Wind observation of GRB 170214A
- GRB 170214A: Swift ToO observations
- GRB 170214A: Fermi-LAT detection
- GRB 170214A: Fermi GBM detection