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.
- GRB 220706A : NICER detection of re-brightening 1 day after the Swift trigger
- GRB 220706A: Swift/UVOT Upper Limits
- GRB 220706A: Swift-BAT refined analysis
- GRB 220706A: LCO Optical Upper Limits
- GRB 220706A: Swift-XRT refined Analysis
- GRB 220706A, GROND observations
- GRB 220706A: Optical observations from NOT
- GRB 220706A: MAXI/GSC detection 84 minutes after the Swift Trigger
- GRB 220706A: Nanshan/NEXT optical upper limits
- GRB 220706A: Enhanced Swift-XRT position
- Swift GRB 220706A: Global MASTER-Net observations report
- GRB 220706A: Zadko observatory - Gingin optical observations
- GRB 220706A: Prompt enhanced Swift-XRT position
- GRB 220706A: Swift detection of a burst