Abstract

The STELLA robotic observatory is made up of two 1.2m telescopes. One is feeding an échelle spectrograph with a spectral resolution of 55,000 since 2006, the other is equipped with an imaging instrument with a field of view of 220. Data are collected during every clear night, calibration data are also taken during bad weather periods to assure the functionality of the system. All CCD frames are stored locally and immediately queued for transfer to the AIP. All environmental data together with meta-data about the scientific observations are stored in a SQL database, which is replicated to our data center in Potsdam. Data reduction is started after each observing night, results of the post-reduction analysis, like radial velocity and stellar parameters, along with the reduced spectra are inserted into the database. This database, with information spanning from how often a target is picked, when it has been successfully acquired, how big were the guiding errors, all the way to radial velocities measurements is an essential tool for both data analysis and quality control.