The Chromospheric Telescope

TL;DR

The paper introduces the Chromospheric Telescope (ChroTel), a new multi-wavelength solar imaging instrument, and presents its design, initial performance, and a method for deriving solar chromospheric velocity maps from its observations.

Contribution

It details the design and initial performance of ChroTel and proposes a novel method for deriving line-of-sight velocity maps from filtergrams.

Findings

ChroTel successfully captures full-disk solar chromosphere images.

The method enables velocity mapping using He I 10830 Å filtergrams.

Initial observations demonstrate the instrument's capability for synoptic solar studies.

Abstract

We introduce the Chromospheric Telescope (ChroTel) at the Observatorio del Teide in Izana on Tenerife as a new multi-wavelength imaging telescope for full-disk synoptic observations of the solar chromosphere. We describe the design of the instrument and summarize its performance during the first one and a half years of operation. We present a method to derive line-of-sight velocity maps of the full solar disk from filtergrams taken in and near the He I infrared line at 10830 \AA.