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Low-resolution transit spectroscopy of three hot Jupiters using the 2 m Himalayan Chandra telescope

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dc.contributor.author Unni, Athira
dc.contributor.author Sivarani, T
dc.contributor.author Goyal, Jayesh
dc.contributor.author Joshi, Yogesh C
dc.contributor.author Oza, Apurva V
dc.contributor.author Banyal, R. K
dc.date.accessioned 2024-12-05T05:51:33Z
dc.date.available 2024-12-05T05:51:33Z
dc.date.issued 2024-11
dc.identifier.citation Monthly Notices of the Royal Astronomical Society, Vol. 535, No. 1, pp. 1123-1135 en_US
dc.identifier.issn 0035-8711
dc.identifier.uri http://hdl.handle.net/2248/8597
dc.description Open Access en_US
dc.description This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited
dc.description.abstract Here, we present the low-resolution transmission spectroscopy of three giant planets using the Himalayan Faint Object Spectrograph Camera (HFOSC) on the 2 m Himalayan Chandra Telescope (HCT) in Hanle, India. It is the first application of transmission spectroscopy with HCT. This study presents results from a single transit, each for three planets: HAT-P-1b, KELT-18b, and WASP-127b. The selection of suitable reference stars assisted in accurately tracking slit losses for the long cadence observations that are needed to achieve the required signal-to-noise ratio (SNR). We employ the common mode correction technique, utilizing a white light transit curve to minimize time-dependent systematic errors. The observed spectra for WASP-127b and HAT-P-1b agree with previouslow-resolution transitspectroscopic observations using other observing facilities. We confirm the presence of Rayleigh scattering in the atmosphere of WASP-127b. In addition, we provide the first low-resolution transmission spectrum for KELT-18b. Modelling the exoplanet atmosphere with HFOSC and available IR observations from HST and Spitzer for WASP-127b and HAT-P-1b shows that HFOSC can be an alternative optical instrument to use in conjunction with IR observations to constrain the atmospheric parameters better. en_US
dc.language.iso en en_US
dc.publisher Oxford University Press on behalf of Royal Astronomical Society en_US
dc.relation.uri https://doi.org/10.1093/mnras/stae2396
dc.rights © 2024 The Author(s)
dc.subject Instrumentation: spectrographs en_US
dc.subject Methods: observational en_US
dc.subject Techniques: spectroscopic en_US
dc.subject Telescopes en_US
dc.subject Planets and satellites: atmospheres en_US
dc.subject Planets and satellites: gaseous planets en_US
dc.title Low-resolution transit spectroscopy of three hot Jupiters using the 2 m Himalayan Chandra telescope en_US
dc.type Article en_US


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