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.
Advanced Search Examples (click to copy):
subject:"Swift"body:"GRB"submitter:"Judith Racusin"13 results found.
- GRB 160228A: GROND afterglow confirmation and X-shooter host candidate redshift
- GRB 160228A: Swift/UVOT Upper Limits
- GRB160228A: Further analyses on spectral lag and extended emission
- GRB 160228A: Mondy optcial observations
- GRB 160228A: RATIR Optical and NIR Observations
- GRB 160228A: MASTER-Amur prompt observations
- GRB 160228A: Swift-XRT refined Analysis
- GRB 160228A: GROND Afterglow Candidate
- GRB 160228A: Swift-BAT refined analysis
- GRB 160228A: optical observations
- GRB 160228A: Enhanced Swift-XRT position
- GRB 160228A: Prompt enhanced Swift-XRT position
- GRB 160228A: Swift detection of a burst