Bibcode
Nortmann, Lisa; Pallé, E.; Murgas, Felipe; Dreizler, Stefan; Iro, Nicolas; Cabrera-Lavers, A.
Referencia bibliográfica
American Astronomical Society, ESS meeting #3, #111.20. BAAS volume 47 #6, November 2015.
Fecha de publicación:
12
2015
Número de citas
0
Número de citas referidas
0
Descripción
I will present one of the latest results of our GTC exoplanet transit
spectroscopy survey. Over the last years our group has obtained
ground-based optical (538 nm - 918 nm) spectrophotometric transit
observations for several hot Jupiters including HAT-P-32Ab using the
OSIRIS (Optical System for Imaging and low Resolution Integrated
Spectroscopy) instrument at the Spanish 10-meter telescope GTC.I will
discuss the source, nature and proper correction of instrument specific
systematic noise we found to affect our data. After its correction, we
were able to yield high quality results with a precision between 482 and
1703 ppm depending on the wavelength channel. We measure a flat optical
transmission spectrum for HAT-P-32Ab, consistent with the results of
Gibson et al. (2013, MNRAS, 436, 2974) obtained with GMOS at
Gemini-North. This independent reproduction of consistent results
re-establishes faith in the reliability of ground-based transmission
spectroscopy and emphasizes the high potential of OSIRIS at the GTC as a
tool to complement current and future space-based observations.