| Name: | Komal Bali |
| Affiliation: | Master's Thesis Student, Department of Physical Sciences, IISER Mohali |
| Conference ID : | ASI2023_238 |
| Title : | Use of sky fiber to correct for solar light contamination in EPRV |
| Authors : | Komal Bali, Dr. Joe Philip Ninan, The NEID Team
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| Mode of Presentation: | Poster |
| Abstract Category : | Instrumentation and Techniques |
| Abstract : | Solar light contamination from the lunar and atmospheric scattering of sunlight results in systematic errors in stellar radial velocity (RV) measurements. It can significantly reduce the 10 cms-1 sensitivity required to detect and characterize terrestrial exoplanets in or near habitable zones of Sun-like stars (Roy et al., 2020).
NEID (NN-EXPLORE Exoplanet Investigations with Doppler spectroscopy) is an optical EPRV Spectrograph on the WIYN 3.5-meter Telescope at Kitt Peak National Observatory, Arizona, USA. The NEID fiber head comprises of sky fiber, science fiber, calibration fiber, and coherent fiber bundles (CFBs).
The addition of low-level spectral contamination at variable effective velocity offsets introduces systematic noise when measuring velocities using classical mask-based cross-correlation techniques. In this work, I will present the effectiveness of using the simultaneous data from the sky fiber to correct for the solar light contamination in the science fiber spectra of the star. This correction technique is expected to reduce this source of sky contamination error to below the photon-noise limit of typical stellar observations |
