Research Article

The STELLA Robotic Observatory on Tenerife

Figure 1

An example spectrum from the SES. What is shown is the  mag K0III RS CVn binary XX Triangulum. Exposure time was 1 hour, spectral resolution is 55,000, an ratio of was achieved. The top panel shows the full spectrum (note the increasing order gaps redwards of 725 nm). The lower panels zoom into the Ca II H&K region, Balmer Hα, and one of the Ca II infrared triplets.