CTAO Telescopes (IMAGE) Cherenkov Telescope Array Caption Three classes of telescopes are required to cover the full CTAO energy range (20 GeV to 300 TeV). The "Alpha Configuration" details the approved configuration of the telescope arrays at the two sites for the Construction Phase of the CTAO Project. With this configuration, and for its core energy range (100 GeV to 10 TeV), the CTAO is planning 23 Medium-Sized Telescopes (MSTs). Four Large-Sized Telescopes (LSTs) and 37 Small-Sized Telescopes (SSTs) are planned to extend the energy range below 100 GeV and up to 300 TeV, respectively. Credit Gabriel Pérez Díaz, IAC. Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.