An Observational Study of Systematics in Differential Transmission Spectroscopy Using HFOSC on the Himalayan Chandra Telescope

arXiv:2608.06749 · astro-ph.EP, astro-ph.IM · Submitted 2026-08-07 · Read on arXiv

Manjunath Bestha, Athira Unni, T Sivarani, Parvathy M, Devika Divakar

astro-ph.EP, astro-ph.IM

Submitted: 2026-08-07

Updated: 2026-08-10

Comments: Submitted to SPIE Astronomical Telescopes + Instrumentation 2026

Code: https://github.com/jradavenport/pykosmos

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Transmission spectroscopy — 22× in this paper · explained in 2 episodes
• Trace — 21× in this paper · explained in 2 episodes
• Himalayan Chandra Telescope — 9× in this paper
• Aperture — 6× in this paper · explained in 1 episode
• Hanle Faint Object Spectrograph Camera — 5× in this paper
• Metallicity — 3× in this paper · explained in 3 episodes
• Indian Astronomical Observatory — 2× in this paper
• Alignment — 1× in this paper · explained in 1 episode
• Calibration — 1× in this paper · explained in 7 episodes

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