TY - JOUR
T1 - Spectroscopic Time-series Performance of JWST/NIRSpec from Commissioning Observations
AU - Espinoza, Néstor
AU - Úbeda, Leonardo
AU - Birkmann, Stephan M.
AU - Ferruit, Pierre
AU - Valenti, Jeff A.
AU - Sing, David K.
AU - Rustamkulov, Zafar
AU - Regan, Michael
AU - Kendrew, Sarah
AU - Sabbi, Elena
AU - Schlawin, Everett
AU - Beatty, Thomas
AU - Albert, Loïc
AU - Greene, Thomas P.
AU - Nikolov, Nikolay
AU - Karakla, Diane
AU - Keyes, Charles
AU - Alves de Oliveira, Catarina
AU - Böker, Torsten
AU - Pena-Guerrero, Maria
AU - Giardino, Giovanna
AU - Kumari, Nimisha
AU - Manjavacas, Elena
AU - Proffitt, Charles
AU - Rawle, Timothy
N1 - Funding Information:
All figures were prepared using Python 3.8.13 with the aid of packages matplotlib 3.5.2, NumPy 1.22.4, SciPy 1.8.1 and juliet 2.2.0. This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program #01118. This paper includes data collected by the TESS mission. Funding for the TESS mission is provided by the NASA’s Science Mission Directorate.
Funding Information:
All figures were prepared using Python 3.8.13 with the aid of packages matplotlib 3.5.2 , NumPy 1.22.4 , SciPy 1.8.1 and juliet 2.2.0 . This work is based on observations made with the NASA/ESA/CSA James Webb Space Telescope. The data were obtained from the Mikulski Archive for Space Telescopes at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS 5-03127 for JWST. These observations are associated with program #01118. This paper includes data collected by the TESS mission. Funding for the TESS mission is provided by the NASA’s Science Mission Directorate.
Publisher Copyright:
© 2023. The Author(s). Published by IOP Publishing Ltd on behalf of the Astronomical Society of the Pacific (ASP). All rights reserved.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - We report on James Webb Space Telescope (JWST) commissioning observations of the transiting exoplanet HAT-P-14 b, obtained using the Bright Object Time Series (BOTS) mode of the NIRSpec instrument with the G395H/F290LP grating/filter combination (3-5 μm). While the data were used primarily to verify that the NIRSpec BOTS mode is working as expected, and to enable it for general scientific use, they yield a precise transmission spectrum which we find is featureless down to the precision level of the instrument, consistent with expectations given HAT-P-14 b’s small scale-height and hence expected atmospheric features. The exquisite quality and stability of the JWST/NIRSpec transit spectrum—almost devoid of any systematic effects—allowed us to obtain median uncertainties of 50-60 ppm in this wavelength range at a resolution of R = 100 in a single exposure, which is in excellent agreement with pre-flight expectations and close to the (or at the) photon-noise limit for a J = 9.094, F-type star like HAT-P-14. These observations showcase the ability of NIRSpec/BOTS to perform cutting-edge transiting exoplanet atmospheric science, setting the stage for observations and discoveries to be made in Cycle 1 and beyond.
AB - We report on James Webb Space Telescope (JWST) commissioning observations of the transiting exoplanet HAT-P-14 b, obtained using the Bright Object Time Series (BOTS) mode of the NIRSpec instrument with the G395H/F290LP grating/filter combination (3-5 μm). While the data were used primarily to verify that the NIRSpec BOTS mode is working as expected, and to enable it for general scientific use, they yield a precise transmission spectrum which we find is featureless down to the precision level of the instrument, consistent with expectations given HAT-P-14 b’s small scale-height and hence expected atmospheric features. The exquisite quality and stability of the JWST/NIRSpec transit spectrum—almost devoid of any systematic effects—allowed us to obtain median uncertainties of 50-60 ppm in this wavelength range at a resolution of R = 100 in a single exposure, which is in excellent agreement with pre-flight expectations and close to the (or at the) photon-noise limit for a J = 9.094, F-type star like HAT-P-14. These observations showcase the ability of NIRSpec/BOTS to perform cutting-edge transiting exoplanet atmospheric science, setting the stage for observations and discoveries to be made in Cycle 1 and beyond.
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U2 - 10.1088/1538-3873/aca3d3
DO - 10.1088/1538-3873/aca3d3
M3 - Article
AN - SCOPUS:85147436453
SN - 0004-6280
VL - 135
JO - Publications of the Astronomical Society of the Pacific
JF - Publications of the Astronomical Society of the Pacific
IS - 1043
M1 - 018002
ER -