Calibration of full-disk He I 10830 Å filtergrams of the Chromospheric Telescope

Zili Shen, Andrea Diercke, Carsten Denker

The Chromospheric Telescope (ChroTel) is a small 10-cm robotic telescope at Observatorio del Teide on Tenerife (Spain), which observes the entire Sun in H$\alpha$, CaII K, and HeI 10830…