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Gemini/GMOS Transmission Spectral Survey: Complete Optical Transmission Spectrum of the Hot Jupiter WASP-4b

  • Authors: C. M. Huitson, J-. M Désert, J. L. Bean, J. J. Fortney, K. B. Stevenson, and M. Bergmann

2017 The Astronomical Journal 154 95.

  • Provider: AAS Journals

Caption: Figure 1.

Sample extracted spectra for R150 transit 1 as well as a sample extracted spectrum from R150 transit 3 to illustrate the improvement in sensitivity and reduction in fringing from the new detector. All spectra were extracted at a similar airmass, around 1.25, and normalized by exposure time. Since the pixels in the two detectors are different sizes, the spectrum from R150 transit 3 has a different number of pixels in the covered wavelength range than the other spectra. We therefore also normalized the spectrum from R150 transit 3 by the ratio of the pixel sizes in order to compare all the spectra on the same scale. Prominent stellar and telluric features are labeled. Fringing is apparent at wavelengths longer than 700 nm for transit 1. The gaps in wavelength coverage are due to the physical gaps between individual CCDs in the detector.

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