TelCorAl beta release: a user-friendly web app for telluric correction

Infrared spectra that are observed at ground-based telescopes are heavily contaminated by absorption features from the Earth's atmosphere. The decontamination process, known as telluric correction, is usually complex and time-consuming, mainly because of the intricate and unstable behaviour of the atmospheric transmission spectrum. TelCorAl (Telluric Correction from Alicante) is a web application that deals with these complications. On the one hand, the Python 3 core extracts the atmospheric transmission spectrum from fitting the observation of a Vega-type standard star, and uses it to correct telluric absorptions from science spectra. On the other hand, the user-friendly web interface shows useful plots and allows users interact with the processes to fine-tune the results.

In the previous scientific meeting of the SEA, we gave a talk to present the TelCorAl method together with a preliminary version of the web interface. Since then, both the Python code and the web app have significantly evolved toward a more robust beta version that is released for final testing by a broader audience.

The TelCorAl beta release is announced for the first time in this poster, and made publicly available during the 2024 SEA meeting.