Pyobs - a Python-based, open source observation control system for robotic telescopes

pyobs is a Python-based, open source framework for operating robotic telescopes. It defines interfaces and the means of communication for so-called modules, which are single pyobs processes handling a single task, like controlling a piece of hardware or performing some kind of operation. While pyobs ships with many ready-to-use modules (several camera types, auto-focus, acquisition & guiding, etc), it is easily extendable to support new hardware and procedures due to its implementation in Python. A graphical user interface for remote operations is provided as well as a full robotic mode based on Las Cumbres Observatory's observation control system -- while other backends can be added as easily. We are currently running pyobs on four telescope, ranging from 50cm to 1.2m, including a solar telescope. The framework is published under a free license and uses open standards wherever possible.