z'-band Ground-based Detection of the Secondary Eclipse of WASP-19b

John Burton; Christopher Watson; Stuart Littlefair; Vikram Dhillon; Neil Gibson; Thomas Marsh; Don Pollacco

doi:10.1088/0067-0049/201/2/36

z'-band Ground-based Detection of the Secondary Eclipse of WASP-19b

John Burton, Christopher Watson, Stuart Littlefair, Vikram Dhillon, Neil Gibson, Thomas Marsh, Don Pollacco

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Abstract

We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z' band using the ULTRACAM triple-beam CCD camera mounted on the New Technology Telescope. The measurement shows a 0.088% ± 0.019% eclipse depth, matching previous predictions based on H- and K-band measurements. We discuss in detail our approach to the removal of errors arising due to systematics in the data set, in addition to fitting a model transit to our data. This fit returns an eclipse center, T 0, of 2455578.7676 HJD, consistent with a circular orbit. Our measurement of the secondary eclipse depth is also compared to model atmospheres of WASP-19b and is found to be consistent with previous measurements at longer wavelengths for the model atmospheres we investigated.

Original language	English
Article number	36
Number of pages	10
Journal	Astrophysical Journal
Volume	201
Issue number	2
DOIs	https://doi.org/10.1088/0067-0049/201/2/36 https://doi.org/10.1088/0067-0049/201/2/36
Publication status	Published - 02 Aug 2012

ASJC Scopus subject areas

Space and Planetary Science
Astronomy and Astrophysics

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title = "z'-band Ground-based Detection of the Secondary Eclipse of WASP-19b",

abstract = "We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z' band using the ULTRACAM triple-beam CCD camera mounted on the New Technology Telescope. The measurement shows a 0.088% ± 0.019% eclipse depth, matching previous predictions based on H- and K-band measurements. We discuss in detail our approach to the removal of errors arising due to systematics in the data set, in addition to fitting a model transit to our data. This fit returns an eclipse center, T 0, of 2455578.7676 HJD, consistent with a circular orbit. Our measurement of the secondary eclipse depth is also compared to model atmospheres of WASP-19b and is found to be consistent with previous measurements at longer wavelengths for the model atmospheres we investigated.",

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T1 - z'-band Ground-based Detection of the Secondary Eclipse of WASP-19b

AU - Burton, John

AU - Watson, Christopher

AU - Littlefair, Stuart

AU - Dhillon, Vikram

AU - Gibson, Neil

AU - Marsh, Thomas

AU - Pollacco, Don

PY - 2012/8/2

Y1 - 2012/8/2

N2 - We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z' band using the ULTRACAM triple-beam CCD camera mounted on the New Technology Telescope. The measurement shows a 0.088% ± 0.019% eclipse depth, matching previous predictions based on H- and K-band measurements. We discuss in detail our approach to the removal of errors arising due to systematics in the data set, in addition to fitting a model transit to our data. This fit returns an eclipse center, T 0, of 2455578.7676 HJD, consistent with a circular orbit. Our measurement of the secondary eclipse depth is also compared to model atmospheres of WASP-19b and is found to be consistent with previous measurements at longer wavelengths for the model atmospheres we investigated.

AB - We present the ground-based detection of the secondary eclipse of the transiting exoplanet WASP-19b. The observations were made in the Sloan z' band using the ULTRACAM triple-beam CCD camera mounted on the New Technology Telescope. The measurement shows a 0.088% ± 0.019% eclipse depth, matching previous predictions based on H- and K-band measurements. We discuss in detail our approach to the removal of errors arising due to systematics in the data set, in addition to fitting a model transit to our data. This fit returns an eclipse center, T 0, of 2455578.7676 HJD, consistent with a circular orbit. Our measurement of the secondary eclipse depth is also compared to model atmospheres of WASP-19b and is found to be consistent with previous measurements at longer wavelengths for the model atmospheres we investigated.

U2 - 10.1088/0067-0049/201/2/36

DO - 10.1088/0067-0049/201/2/36

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JO - The Astrophysical Journal

JF - The Astrophysical Journal

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ER -

z'-band Ground-based Detection of the Secondary Eclipse of WASP-19b

Abstract

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