Hanle Echelle Spectrograph Archives - Astrobiology

Observed spectra after dividing by the out-of-transit spectrum (residuals), shown in the stellar rest frame. Vertical orange and green dotted lines indicate the positions of the Na D2 and D1 lines, respectively. The region between the two horizontal dotted lines corresponds to in-transit observations, while regions outside represent out-of-transit data. The tilted red lines at the positions of Na D2 and D1 indicate the expected shift of the planetary absorption signal. -- astro-ph.EP

Astronomy & Telescopes, Atmospheres, Climate, Weather, Exoplanets, -moons, -comets, Imaging & Spectroscopy, Status Report

An Initial Assessment Of The Hanle Echelle Spectrograph For Exoplanet Atmosphere Studies

by Keith CowingSeptember 24, 2025September 24, 2025

Transmission spectroscopy is an effective technique for probing exoplanetary atmospheres.