Poster Abstracts

Name/Affiliation:  Marco Mittag (Hamburger Sternwarte)

Title:  First results of the Hamburg Ca II survey with TIGRE

Abstract:
The first results of the Hamburg Ca II survey with TIGRE (Telescopio Internacional de Guanajuato,Robotico-Espectroscopico) are presented. This program was started in Aug. 2013 with the monitoring of several stars. The goal of this program is to measure the short- and long term variability of stellar activity for stars of different spectral types in different spectral lines. A transformation equation of the TIGRE S-Index into the Mount Wilson S-Index was performed in order to compare our results to the vast body of S-Index measurements. Furthermore, the correlation between the S-Index and the lines of the Ca IRT was studied with absolutely simultaneous measurements.