The transiting exoplanet community early release science program for JWST

Jacob L. Bean; Kevin B. Stevenson; Natalie M. Batalha; Zachory Berta-Thompson; Laura Kreidberg; Nicolas Crouzet; Björn Benneke; Michael Line; David K. Sing; Hannah R. Wakeford; Heather A. Knutson; Eliza M.R. Kempton; Jean Michel Désert; Ian Crossfield; Natasha E. Batalha; Julien de Wit; Vivien Parmentier; Joseph Harrington; Julianne I. Moses; Mercedes Lopez-Morales; Munazza K. Alam; Jasmina Blecic; Giovanni Bruno; Aarynn L. Carter; John W. Chapman; Leen Decin; Diana Dragomir; Thomas M. Evans; Jonathan J. Fortney; Jonathan D. Fraine; Peter Gao; Antonio García Muñoz; Neale P. Gibson; Jayesh M. Goyal; Kevin Heng; Renyu Hu; Sarah Kendrew; Brian M. Kilpatrick; Jessica Krick; Pierre Olivier Lagage; Monika Lendl; Tom Louden; Nikku Madhusudhan; Avi M. Mandell; Megan Mansfield; Erin M. May; Giuseppe Morello; Caroline V. Morley; Nikolay Nikolov; Seth Redfield; Jessica E. Roberts; Everett Schlawin; Jessica J. Spake; Kamen O. Todorov; Angelos Tsiaras; Olivia Venot; William C. Waalkes; Peter J. Wheatley; Robert T. Zellem; Daniel Angerhausen; David Barrado; Ludmila Carone; Sarah L. Casewell; Patricio E. Cubillos; Mario Damiano; Miguel De Val Borro; Benjamin Drummond; Billy Edwards; Michael Endl; Nestor Espinoza; Kevin France; John E. Gizis; Thomas P. Greene; Thomas K. Henning; Yucian Hong; James G. Ingalls; Nicolas Iro; Patrick G.J. Irwin; Tiffany Kataria; Fred Lahuis; Jérémy Leconte; Jorge Lillo-Box; Stefan Lines; Joshua D. Lothringer; Luigi Mancini; Franck Marchis; Nathan Mayne; Enric Palle; Emily Rauscher; Gaël Roudier; Evgenya Shkolnik; John Southworth; Mark R. Swain; Jake Taylor; Johanna Teske; Giovanna Tinetti; Pascal Tremblin; Gregory S. Tucker; Roy Van Boekel; Ingo P. Waldmann; Ian C. Weaver; Tiziano Zingales

doi:10.1088/1538-3873/aadbf3

The transiting exoplanet community early release science program for JWST

Jacob L. Bean, Kevin B. Stevenson, Natalie M. Batalha, Zachory Berta-Thompson, Laura Kreidberg, Nicolas Crouzet, Björn Benneke, Michael Line, David K. Sing, Hannah R. Wakeford, Heather A. Knutson, Eliza M.R. Kempton, Jean Michel Désert, Ian Crossfield, Natasha E. Batalha, Julien de Wit, Vivien Parmentier, Joseph Harrington, Julianne I. Moses, Mercedes Lopez-MoralesMunazza K. Alam, Jasmina Blecic, Giovanni Bruno, Aarynn L. Carter, John W. Chapman, Leen Decin, Diana Dragomir, Thomas M. Evans, Jonathan J. Fortney, Jonathan D. Fraine, Peter Gao, Antonio García Muñoz, Neale P. Gibson, Jayesh M. Goyal, Kevin Heng, Renyu Hu, Sarah Kendrew, Brian M. Kilpatrick, Jessica Krick, Pierre Olivier Lagage, Monika Lendl, Tom Louden, Nikku Madhusudhan, Avi M. Mandell, Megan Mansfield, Erin M. May, Giuseppe Morello, Caroline V. Morley, Nikolay Nikolov, Seth Redfield, Jessica E. Roberts, Everett Schlawin, Jessica J. Spake, Kamen O. Todorov, Angelos Tsiaras, Olivia Venot, William C. Waalkes, Peter J. Wheatley, Robert T. Zellem, Daniel Angerhausen, David Barrado, Ludmila Carone, Sarah L. Casewell, Patricio E. Cubillos, Mario Damiano, Miguel De Val Borro, Benjamin Drummond, Billy Edwards, Michael Endl, Nestor Espinoza, Kevin France, John E. Gizis, Thomas P. Greene, Thomas K. Henning, Yucian Hong, James G. Ingalls, Nicolas Iro, Patrick G.J. Irwin, Tiffany Kataria, Fred Lahuis, Jérémy Leconte, Jorge Lillo-Box, Stefan Lines, Joshua D. Lothringer, Luigi Mancini, Franck Marchis, Nathan Mayne, Enric Palle, Emily Rauscher, Gaël Roudier, Evgenya Shkolnik, John Southworth, Mark R. Swain, Jake Taylor, Johanna Teske, Giovanna Tinetti, Pascal Tremblin, Gregory S. Tucker, Roy Van Boekel, Ingo P. Waldmann, Ian C. Weaver, Tiziano Zingales

CLAS-NS: Earth and Space Exploration, School of (SESE)

Research output: Contribution to journal › Article

30 Scopus citations

Abstract

The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. However, the high-precision, timeseries observations required for such investigations have unique technical challenges, and prior experience with Hubble, Spitzer, and other facilities indicates that there will be a steep learning curve when JWST becomes operational. In this paper, we describe the science objectives and detailed plans of the Transiting Exoplanet Community Early Release Science (ERS) Program, which is a recently approved program for JWST observations early in Cycle 1. We also describe the simulations used to establish the program. The goal of this project, for which the obtained data will have no exclusive access period, is to accelerate the acquisition and diffusion of technical expertise for transiting exoplanet observations with JWST, while also providing a compelling set of representative data sets that will enable immediate scientific breakthroughs. The Transiting Exoplanet Community ERS Program will exercise the timeseries modes of all four JWST instruments that have been identified as the consensus highest priorities, observe the full suite of transiting planet characterization geometries (transits, eclipses, and phase curves), and target planets with host stars that span an illustrative range of brightnesses. The observations in this program were defined through an inclusive and transparent process that had participation from JWST instrument experts and international leaders in transiting exoplanet studies. The targets have been vetted with previous measurements, will be observable early in the mission, and have exceptional scientific merit. Community engagement in the project will be centered on a twophase Data Challenge that culminates with the delivery of planetary spectra, timeseries instrument performance reports, and open-source data analysis toolkits in time to inform the agenda for Cycle 2 of the JWST mission.

Original language	English (US)
Article number	114402
Journal	Publications of the Astronomical Society of the Pacific
Volume	130
Issue number	993
DOIs	https://doi.org/10.1088/1538-3873/aadbf3
State	Published - Nov 2018

Keywords

Methods: Observational
Planets and satellites: Atmospheres
Planets and satellites: Individual

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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Bean, J. L., Stevenson, K. B., Batalha, N. M., Berta-Thompson, Z., Kreidberg, L., Crouzet, N., Benneke, B., Line, M., Sing, D. K., Wakeford, H. R., Knutson, H. A., Kempton, E. M. R., Désert, J. M., Crossfield, I., Batalha, N. E., de Wit, J., Parmentier, V., Harrington, J., Moses, J. I., ... Zingales, T. (2018). The transiting exoplanet community early release science program for JWST. Publications of the Astronomical Society of the Pacific, 130(993), [114402]. https://doi.org/10.1088/1538-3873/aadbf3

The transiting exoplanet community early release science program for JWST. / Bean, Jacob L.; Stevenson, Kevin B.; Batalha, Natalie M.; Berta-Thompson, Zachory; Kreidberg, Laura; Crouzet, Nicolas; Benneke, Björn; Line, Michael; Sing, David K.; Wakeford, Hannah R.; Knutson, Heather A.; Kempton, Eliza M.R.; Désert, Jean Michel; Crossfield, Ian; Batalha, Natasha E.; de Wit, Julien; Parmentier, Vivien; Harrington, Joseph; Moses, Julianne I.; Lopez-Morales, Mercedes; Alam, Munazza K.; Blecic, Jasmina; Bruno, Giovanni; Carter, Aarynn L.; Chapman, John W.; Decin, Leen; Dragomir, Diana; Evans, Thomas M.; Fortney, Jonathan J.; Fraine, Jonathan D.; Gao, Peter; Muñoz, Antonio García; Gibson, Neale P.; Goyal, Jayesh M.; Heng, Kevin; Hu, Renyu; Kendrew, Sarah; Kilpatrick, Brian M.; Krick, Jessica; Lagage, Pierre Olivier; Lendl, Monika; Louden, Tom; Madhusudhan, Nikku; Mandell, Avi M.; Mansfield, Megan; May, Erin M.; Morello, Giuseppe; Morley, Caroline V.; Nikolov, Nikolay; Redfield, Seth; Roberts, Jessica E.; Schlawin, Everett; Spake, Jessica J.; Todorov, Kamen O.; Tsiaras, Angelos; Venot, Olivia; Waalkes, William C.; Wheatley, Peter J.; Zellem, Robert T.; Angerhausen, Daniel; Barrado, David; Carone, Ludmila; Casewell, Sarah L.; Cubillos, Patricio E.; Damiano, Mario; Borro, Miguel De Val; Drummond, Benjamin; Edwards, Billy; Endl, Michael; Espinoza, Nestor; France, Kevin; Gizis, John E.; Greene, Thomas P.; Henning, Thomas K.; Hong, Yucian; Ingalls, James G.; Iro, Nicolas; Irwin, Patrick G.J.; Kataria, Tiffany; Lahuis, Fred; Leconte, Jérémy; Lillo-Box, Jorge; Lines, Stefan; Lothringer, Joshua D.; Mancini, Luigi; Marchis, Franck; Mayne, Nathan; Palle, Enric; Rauscher, Emily; Roudier, Gaël; Shkolnik, Evgenya; Southworth, John; Swain, Mark R.; Taylor, Jake; Teske, Johanna; Tinetti, Giovanna; Tremblin, Pascal; Tucker, Gregory S.; Boekel, Roy Van; Waldmann, Ingo P.; Weaver, Ian C.; Zingales, Tiziano.

In: Publications of the Astronomical Society of the Pacific, Vol. 130, No. 993, 114402, 11.2018.

Research output: Contribution to journal › Article

Bean, JL, Stevenson, KB, Batalha, NM, Berta-Thompson, Z, Kreidberg, L, Crouzet, N, Benneke, B, Line, M, Sing, DK, Wakeford, HR, Knutson, HA, Kempton, EMR, Désert, JM, Crossfield, I, Batalha, NE, de Wit, J, Parmentier, V, Harrington, J, Moses, JI, Lopez-Morales, M, Alam, MK, Blecic, J, Bruno, G, Carter, AL, Chapman, JW, Decin, L, Dragomir, D, Evans, TM, Fortney, JJ, Fraine, JD, Gao, P, Muñoz, AG, Gibson, NP, Goyal, JM, Heng, K, Hu, R, Kendrew, S, Kilpatrick, BM, Krick, J, Lagage, PO, Lendl, M, Louden, T, Madhusudhan, N, Mandell, AM, Mansfield, M, May, EM, Morello, G, Morley, CV, Nikolov, N, Redfield, S, Roberts, JE, Schlawin, E, Spake, JJ, Todorov, KO, Tsiaras, A, Venot, O, Waalkes, WC, Wheatley, PJ, Zellem, RT, Angerhausen, D, Barrado, D, Carone, L, Casewell, SL, Cubillos, PE, Damiano, M, Borro, MDV, Drummond, B, Edwards, B, Endl, M, Espinoza, N, France, K, Gizis, JE, Greene, TP, Henning, TK, Hong, Y, Ingalls, JG, Iro, N, Irwin, PGJ, Kataria, T, Lahuis, F, Leconte, J, Lillo-Box, J, Lines, S, Lothringer, JD, Mancini, L, Marchis, F, Mayne, N, Palle, E, Rauscher, E, Roudier, G, Shkolnik, E, Southworth, J, Swain, MR, Taylor, J, Teske, J, Tinetti, G, Tremblin, P, Tucker, GS, Boekel, RV, Waldmann, IP, Weaver, IC & Zingales, T 2018, 'The transiting exoplanet community early release science program for JWST', Publications of the Astronomical Society of the Pacific, vol. 130, no. 993, 114402. https://doi.org/10.1088/1538-3873/aadbf3

Bean, Jacob L. ; Stevenson, Kevin B. ; Batalha, Natalie M. ; Berta-Thompson, Zachory ; Kreidberg, Laura ; Crouzet, Nicolas ; Benneke, Björn ; Line, Michael ; Sing, David K. ; Wakeford, Hannah R. ; Knutson, Heather A. ; Kempton, Eliza M.R. ; Désert, Jean Michel ; Crossfield, Ian ; Batalha, Natasha E. ; de Wit, Julien ; Parmentier, Vivien ; Harrington, Joseph ; Moses, Julianne I. ; Lopez-Morales, Mercedes ; Alam, Munazza K. ; Blecic, Jasmina ; Bruno, Giovanni ; Carter, Aarynn L. ; Chapman, John W. ; Decin, Leen ; Dragomir, Diana ; Evans, Thomas M. ; Fortney, Jonathan J. ; Fraine, Jonathan D. ; Gao, Peter ; Muñoz, Antonio García ; Gibson, Neale P. ; Goyal, Jayesh M. ; Heng, Kevin ; Hu, Renyu ; Kendrew, Sarah ; Kilpatrick, Brian M. ; Krick, Jessica ; Lagage, Pierre Olivier ; Lendl, Monika ; Louden, Tom ; Madhusudhan, Nikku ; Mandell, Avi M. ; Mansfield, Megan ; May, Erin M. ; Morello, Giuseppe ; Morley, Caroline V. ; Nikolov, Nikolay ; Redfield, Seth ; Roberts, Jessica E. ; Schlawin, Everett ; Spake, Jessica J. ; Todorov, Kamen O. ; Tsiaras, Angelos ; Venot, Olivia ; Waalkes, William C. ; Wheatley, Peter J. ; Zellem, Robert T. ; Angerhausen, Daniel ; Barrado, David ; Carone, Ludmila ; Casewell, Sarah L. ; Cubillos, Patricio E. ; Damiano, Mario ; Borro, Miguel De Val ; Drummond, Benjamin ; Edwards, Billy ; Endl, Michael ; Espinoza, Nestor ; France, Kevin ; Gizis, John E. ; Greene, Thomas P. ; Henning, Thomas K. ; Hong, Yucian ; Ingalls, James G. ; Iro, Nicolas ; Irwin, Patrick G.J. ; Kataria, Tiffany ; Lahuis, Fred ; Leconte, Jérémy ; Lillo-Box, Jorge ; Lines, Stefan ; Lothringer, Joshua D. ; Mancini, Luigi ; Marchis, Franck ; Mayne, Nathan ; Palle, Enric ; Rauscher, Emily ; Roudier, Gaël ; Shkolnik, Evgenya ; Southworth, John ; Swain, Mark R. ; Taylor, Jake ; Teske, Johanna ; Tinetti, Giovanna ; Tremblin, Pascal ; Tucker, Gregory S. ; Boekel, Roy Van ; Waldmann, Ingo P. ; Weaver, Ian C. ; Zingales, Tiziano. / The transiting exoplanet community early release science program for JWST. In: Publications of the Astronomical Society of the Pacific. 2018 ; Vol. 130, No. 993.

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title = "The transiting exoplanet community early release science program for JWST",

abstract = "The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. However, the high-precision, timeseries observations required for such investigations have unique technical challenges, and prior experience with Hubble, Spitzer, and other facilities indicates that there will be a steep learning curve when JWST becomes operational. In this paper, we describe the science objectives and detailed plans of the Transiting Exoplanet Community Early Release Science (ERS) Program, which is a recently approved program for JWST observations early in Cycle 1. We also describe the simulations used to establish the program. The goal of this project, for which the obtained data will have no exclusive access period, is to accelerate the acquisition and diffusion of technical expertise for transiting exoplanet observations with JWST, while also providing a compelling set of representative data sets that will enable immediate scientific breakthroughs. The Transiting Exoplanet Community ERS Program will exercise the timeseries modes of all four JWST instruments that have been identified as the consensus highest priorities, observe the full suite of transiting planet characterization geometries (transits, eclipses, and phase curves), and target planets with host stars that span an illustrative range of brightnesses. The observations in this program were defined through an inclusive and transparent process that had participation from JWST instrument experts and international leaders in transiting exoplanet studies. The targets have been vetted with previous measurements, will be observable early in the mission, and have exceptional scientific merit. Community engagement in the project will be centered on a twophase Data Challenge that culminates with the delivery of planetary spectra, timeseries instrument performance reports, and open-source data analysis toolkits in time to inform the agenda for Cycle 2 of the JWST mission.",

keywords = "Methods: Observational, Planets and satellites: Atmospheres, Planets and satellites: Individual",

author = "Bean, {Jacob L.} and Stevenson, {Kevin B.} and Batalha, {Natalie M.} and Zachory Berta-Thompson and Laura Kreidberg and Nicolas Crouzet and Bj{\"o}rn Benneke and Michael Line and Sing, {David K.} and Wakeford, {Hannah R.} and Knutson, {Heather A.} and Kempton, {Eliza M.R.} and D{\'e}sert, {Jean Michel} and Ian Crossfield and Batalha, {Natasha E.} and {de Wit}, Julien and Vivien Parmentier and Joseph Harrington and Moses, {Julianne I.} and Mercedes Lopez-Morales and Alam, {Munazza K.} and Jasmina Blecic and Giovanni Bruno and Carter, {Aarynn L.} and Chapman, {John W.} and Leen Decin and Diana Dragomir and Evans, {Thomas M.} and Fortney, {Jonathan J.} and Fraine, {Jonathan D.} and Peter Gao and Mu{\~n}oz, {Antonio Garc{\'i}a} and Gibson, {Neale P.} and Goyal, {Jayesh M.} and Kevin Heng and Renyu Hu and Sarah Kendrew and Kilpatrick, {Brian M.} and Jessica Krick and Lagage, {Pierre Olivier} and Monika Lendl and Tom Louden and Nikku Madhusudhan and Mandell, {Avi M.} and Megan Mansfield and May, {Erin M.} and Giuseppe Morello and Morley, {Caroline V.} and Nikolay Nikolov and Seth Redfield and Roberts, {Jessica E.} and Everett Schlawin and Spake, {Jessica J.} and Todorov, {Kamen O.} and Angelos Tsiaras and Olivia Venot and Waalkes, {William C.} and Wheatley, {Peter J.} and Zellem, {Robert T.} and Daniel Angerhausen and David Barrado and Ludmila Carone and Casewell, {Sarah L.} and Cubillos, {Patricio E.} and Mario Damiano and Borro, {Miguel De Val} and Benjamin Drummond and Billy Edwards and Michael Endl and Nestor Espinoza and Kevin France and Gizis, {John E.} and Greene, {Thomas P.} and Henning, {Thomas K.} and Yucian Hong and Ingalls, {James G.} and Nicolas Iro and Irwin, {Patrick G.J.} and Tiffany Kataria and Fred Lahuis and J{\'e}r{\'e}my Leconte and Jorge Lillo-Box and Stefan Lines and Lothringer, {Joshua D.} and Luigi Mancini and Franck Marchis and Nathan Mayne and Enric Palle and Emily Rauscher and Ga{\"e}l Roudier and Evgenya Shkolnik and John Southworth and Swain, {Mark R.} and Jake Taylor and Johanna Teske and Giovanna Tinetti and Pascal Tremblin and Tucker, {Gregory S.} and Boekel, {Roy Van} and Waldmann, {Ingo P.} and Weaver, {Ian C.} and Tiziano Zingales",

year = "2018",

month = nov,

doi = "10.1088/1538-3873/aadbf3",

language = "English (US)",

volume = "130",

journal = "Publications of the Astronomical Society of the Pacific",

issn = "0004-6280",

publisher = "University of Chicago",

number = "993",

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TY - JOUR

T1 - The transiting exoplanet community early release science program for JWST

AU - Bean, Jacob L.

AU - Stevenson, Kevin B.

AU - Batalha, Natalie M.

AU - Berta-Thompson, Zachory

AU - Kreidberg, Laura

AU - Crouzet, Nicolas

AU - Benneke, Björn

AU - Line, Michael

AU - Sing, David K.

AU - Wakeford, Hannah R.

AU - Knutson, Heather A.

AU - Kempton, Eliza M.R.

AU - Désert, Jean Michel

AU - Crossfield, Ian

AU - Batalha, Natasha E.

AU - de Wit, Julien

AU - Parmentier, Vivien

AU - Harrington, Joseph

AU - Moses, Julianne I.

AU - Lopez-Morales, Mercedes

AU - Alam, Munazza K.

AU - Blecic, Jasmina

AU - Bruno, Giovanni

AU - Carter, Aarynn L.

AU - Chapman, John W.

AU - Decin, Leen

AU - Dragomir, Diana

AU - Evans, Thomas M.

AU - Fortney, Jonathan J.

AU - Fraine, Jonathan D.

AU - Gao, Peter

AU - Muñoz, Antonio García

AU - Gibson, Neale P.

AU - Goyal, Jayesh M.

AU - Heng, Kevin

AU - Hu, Renyu

AU - Kendrew, Sarah

AU - Kilpatrick, Brian M.

AU - Krick, Jessica

AU - Lagage, Pierre Olivier

AU - Lendl, Monika

AU - Louden, Tom

AU - Madhusudhan, Nikku

AU - Mandell, Avi M.

AU - Mansfield, Megan

AU - May, Erin M.

AU - Morello, Giuseppe

AU - Morley, Caroline V.

AU - Nikolov, Nikolay

AU - Redfield, Seth

AU - Roberts, Jessica E.

AU - Schlawin, Everett

AU - Spake, Jessica J.

AU - Todorov, Kamen O.

AU - Tsiaras, Angelos

AU - Venot, Olivia

AU - Waalkes, William C.

AU - Wheatley, Peter J.

AU - Zellem, Robert T.

AU - Angerhausen, Daniel

AU - Barrado, David

AU - Carone, Ludmila

AU - Casewell, Sarah L.

AU - Cubillos, Patricio E.

AU - Damiano, Mario

AU - Borro, Miguel De Val

AU - Drummond, Benjamin

AU - Edwards, Billy

AU - Endl, Michael

AU - Espinoza, Nestor

AU - France, Kevin

AU - Gizis, John E.

AU - Greene, Thomas P.

AU - Henning, Thomas K.

AU - Hong, Yucian

AU - Ingalls, James G.

AU - Iro, Nicolas

AU - Irwin, Patrick G.J.

AU - Kataria, Tiffany

AU - Lahuis, Fred

AU - Leconte, Jérémy

AU - Lillo-Box, Jorge

AU - Lines, Stefan

AU - Lothringer, Joshua D.

AU - Mancini, Luigi

AU - Marchis, Franck

AU - Mayne, Nathan

AU - Palle, Enric

AU - Rauscher, Emily

AU - Roudier, Gaël

AU - Shkolnik, Evgenya

AU - Southworth, John

AU - Swain, Mark R.

AU - Taylor, Jake

AU - Teske, Johanna

AU - Tinetti, Giovanna

AU - Tremblin, Pascal

AU - Tucker, Gregory S.

AU - Boekel, Roy Van

AU - Waldmann, Ingo P.

AU - Weaver, Ian C.

AU - Zingales, Tiziano

PY - 2018/11

Y1 - 2018/11

N2 - The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. However, the high-precision, timeseries observations required for such investigations have unique technical challenges, and prior experience with Hubble, Spitzer, and other facilities indicates that there will be a steep learning curve when JWST becomes operational. In this paper, we describe the science objectives and detailed plans of the Transiting Exoplanet Community Early Release Science (ERS) Program, which is a recently approved program for JWST observations early in Cycle 1. We also describe the simulations used to establish the program. The goal of this project, for which the obtained data will have no exclusive access period, is to accelerate the acquisition and diffusion of technical expertise for transiting exoplanet observations with JWST, while also providing a compelling set of representative data sets that will enable immediate scientific breakthroughs. The Transiting Exoplanet Community ERS Program will exercise the timeseries modes of all four JWST instruments that have been identified as the consensus highest priorities, observe the full suite of transiting planet characterization geometries (transits, eclipses, and phase curves), and target planets with host stars that span an illustrative range of brightnesses. The observations in this program were defined through an inclusive and transparent process that had participation from JWST instrument experts and international leaders in transiting exoplanet studies. The targets have been vetted with previous measurements, will be observable early in the mission, and have exceptional scientific merit. Community engagement in the project will be centered on a twophase Data Challenge that culminates with the delivery of planetary spectra, timeseries instrument performance reports, and open-source data analysis toolkits in time to inform the agenda for Cycle 2 of the JWST mission.

AB - The James Webb Space Telescope (JWST) presents the opportunity to transform our understanding of planets and the origins of life by revealing the atmospheric compositions, structures, and dynamics of transiting exoplanets in unprecedented detail. However, the high-precision, timeseries observations required for such investigations have unique technical challenges, and prior experience with Hubble, Spitzer, and other facilities indicates that there will be a steep learning curve when JWST becomes operational. In this paper, we describe the science objectives and detailed plans of the Transiting Exoplanet Community Early Release Science (ERS) Program, which is a recently approved program for JWST observations early in Cycle 1. We also describe the simulations used to establish the program. The goal of this project, for which the obtained data will have no exclusive access period, is to accelerate the acquisition and diffusion of technical expertise for transiting exoplanet observations with JWST, while also providing a compelling set of representative data sets that will enable immediate scientific breakthroughs. The Transiting Exoplanet Community ERS Program will exercise the timeseries modes of all four JWST instruments that have been identified as the consensus highest priorities, observe the full suite of transiting planet characterization geometries (transits, eclipses, and phase curves), and target planets with host stars that span an illustrative range of brightnesses. The observations in this program were defined through an inclusive and transparent process that had participation from JWST instrument experts and international leaders in transiting exoplanet studies. The targets have been vetted with previous measurements, will be observable early in the mission, and have exceptional scientific merit. Community engagement in the project will be centered on a twophase Data Challenge that culminates with the delivery of planetary spectra, timeseries instrument performance reports, and open-source data analysis toolkits in time to inform the agenda for Cycle 2 of the JWST mission.

KW - Methods: Observational

KW - Planets and satellites: Atmospheres

KW - Planets and satellites: Individual

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