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"11 results found.
- GRB 140710A: iTelescope.Net T11 Optical Observation
- GRB 140710A: Swift-XRT refined Analysis
- GRB 140710A: Swift-BAT refined analysis
- GRB 140710A: Swift/UVOT Upper Limits
- GRB 140710A: Gemini-N redshift of likely host
- GRB 140710A: Enhanced Swift-XRT position
- GRB 140710A: RATIR Optical and NIR Observations
- GRB 140710A: P60 Confirmation of Afterglow
- GRB 140710A: correction to GCN #16565
- GRB 140710A: GROND Detection of NIR Afterglow Candidate
- GRB 140710A: Swift detection of a burst