Cherenkov Telescope Array science data analysis using the ctools

The ctools are a set of analysis executables that are being developed as a framework for analysing Cherenkov Telescope Array (CTA) high-level data products. The ctools are inspired by science analysis software available for existing high-energy astronomy instruments, and they follow the modular ftools model developed by the High Energy Astrophysics Science Archive Research Center (HEASARC). The ctools are based on Gamma Lib, a C++ library interfaced to Python that provides a framework for an instrument-independent analysis of gamma-ray data. We present the status of the software development, and describe possible workflows that can be implemented for the analysis of gamma-ray data.