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"15 results found.
- GRB 100413A: GMRT observation of radio afterglow
- GRB 100413A: Radio Afterglow Detection with the EVLA
- GRB 100413A: Suzaku WAM observation of the prompt emission
- GRB 100413A: Swift-BAT final refined analysis
- GRB 100413A: GROND Upper limits
- GRB 100413A: Swift/UVOT Upper Limits
- Konus-Wind observation of GRB 100413A
- GRB 100413A: Faulkes Telescope South observations
- Tentative redshift of GRB100413A from X-ray data
- GRB 100413A: SARA upper limit
- GRB 100413A: Swift-XRT Refined Analysis
- GRB 100413A: Swift-BAT initial refined analysis
- GRB 100413A: Enhanced Swift-XRT position
- GRB 100413A: MASTER-Net optical observations
- GRB 100413A: Swift detection of a burst