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 130408A: Suzaku WAM observation of the prompt emission
- GRB 130408a: Skynet Optical Observations
- GRB 130408A: SMARTS optical/IR afterglow observations
- GRB 130408A, Swift-BAT refined analysis
- GRB 130408A: Zadko observatory - Gingin optical observations
- GRB130408A: Swift/UVOT followup observations
- GRB 130408A: Swift-XRT refined Analysis
- Konus-Wind observation of GRB 130408A
- GRB 130408A: Enhanced Swift-XRT position
- GRB 130408A - Gemini-S/GMOS redshift determination
- GRB 130408A - VLT/X-shooter redshift determination
- GRB 130408A: GROND detection of the afterglow
- GRB 130408A: Swift/UVOT Detection of the Optical Afterglow
- GRB 130408A: Liverpool Telescope Optical candidate detection
- GRB 130408A: Swift detection of a burst