Spectral calibration of hyperspectral imagery using atmospheric absorption features

2006 ◽  
Vol 45 (10) ◽  
pp. 2360 ◽  
Author(s):  
Luis Guanter ◽  
Rudolf Richter ◽  
José Moreno
Keyword(s):  
Hyperspectral Imagery ◽  
Atmospheric Absorption ◽  
Spectral Calibration ◽  
Absorption Features

Wavelength calibration of imaging spectrometer using atmospheric absorption features

2012 ◽  
Author(s):  
Jiankang Zhou ◽  
Yuheng Chen ◽  
Xinhua Chen ◽  
Yiqun Ji ◽  
Weimin Shen
Keyword(s):  
Atmospheric Absorption ◽  
Imaging Spectrometer ◽  
Wavelength Calibration ◽  
Absorption Features

Characterization of fine resolution field spectrometers using solar Fraunhofer lines and atmospheric absorption features

2010 ◽  
Vol 49 (15) ◽  
pp. 2858 ◽  
Author(s):  
Michele Meroni ◽  
Lorenzo Busetto ◽  
Luis Guanter ◽  
Sergio Cogliati ◽  
Giovanni Franco Crosta ◽  
...  
Keyword(s):  
Atmospheric Absorption ◽  
Fine Resolution ◽  
Absorption Features

scholarly journals Detection of Fe I and Fe II in the atmosphere of MASCARA-2b using a cross-correlation method

2020 ◽  
Vol 638 ◽  
pp. A26 ◽  
Author(s):  
M. Stangret ◽  
N. Casasayas-Barris ◽  
E. Pallé ◽  
F. Yan ◽  
A. Sánchez-López ◽  
...  
Keyword(s):  
Cross Correlation ◽  
Correlation Method ◽  
High Spectral Resolution ◽  
Transmission Model ◽  
Atmospheric Transmission ◽  
Atmospheric Absorption ◽  
Hot Jupiters ◽  
Night Side ◽  
Absorption Features ◽  
Hot Jupiter

Ultra-hot Jupiters are gas giants planets whose dayside temperature is greater than 2200 K as a consequence of the strong irradiation received from the host star. These kinds of objects are perfect laboratories to study the chemistry of exoplanetary upper atmospheres via transmission spectroscopy. Exo-atmospheric absorption features are buried in the noise of the in-transit residual spectra. However we can retrieve information of hundreds of atmospheric absorption lines by performing a cross-correlation with an atmospheric transmission model, which allows us to greatly increase the exo-atmospheric signal. The Rossiter–McLaughlin effect and centre-to-limb variation contribute strongly at the high spectral resolution of our data. We present the first detection of Fe I and confirmation of absorption features of Fe II in the atmosphere of the ultra-hot Jupiter MASCARA-2b/KELT-20b, by using three transit observations with HARPS-N. After combining all transit observations we find a high cross-correlation signal of Fe I and Fe II with signal-to-noise ratios of 10.5 ± 0.4 and 8.6 ± 0.5, respectively. The peak absorption for both species appear to be blue-shifted with velocities of − 6.3 ± 0.8 km s−1 for Fe I and − 2.8 ± 0.8 km s−1 for Fe II, suggesting the presence of winds from the day- to night-side of the atmosphere of the planet. These results confirm previous studies of this planet and add a new atomic species (Fe I) to the long list of detected species in the atmosphere of MASCARA-2b, making it, together with KELT-9b, the most feature-rich ultra-hot Jupiter to date.

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