Data analysis pipeline for EChO end-to-end simulations

Waldmann, I. P.; Pascale, Enzo

doi:10.1007/s10686-014-9408-z

Cited by 7 publications

(14 citation statements)

References 35 publications

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“…EChOSim does not provide data reduction software to reconstruct the planet and star spectra, and their uncertainties from the simulated timelines. A reduction pipeline to reconstruct the spectra from EChOSim simulations has been developed for the EChO assessment study [10] and was used by [11] to compare the retrieved atmospheric properties (temperature structure, composition and cloud properties) with the known input values.…”

Section: The Echosim Simulatormentioning

confidence: 99%

“…This allows the validation of the reduction pipeline in reconstructing the signal in the presence of correlated and uncorrelated noise sources, and systematics. A data reduction pipeline has been developed to analyse EChOSim simulations in the context of the EChO mission study [10]. Case studies discussed in the last paragraph of this section have been analysed using this reduction software.…”

Section: Use Of Echosimmentioning

confidence: 99%

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EChOSim: The Exoplanet Characterisation Observatory software simulator

et al. 2015

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EChOSim is the end-to-end time-domain simulator of the Exoplanet Characterisation Observatory (EChO) space mission. EChOSim has been developed to assess the capability of the EChO mission concept to detect and characterise the atmospheres of transiting exoplanets. Here we discuss the details of the EChOSim implementation and describe the models used to represent the instrument and to simulate the detection. Software simulators have assumed a central role in the design of new instrumentation and in assessing the level of systematics affecting the measurements of existing experiments. Thanks to its high modularity, EChOSim can simulate basic aspects of several existing and proposed spectrometers including instruments on the Hubble Space Telescope and Spitzer, ground-based and balloon-borne experiments . A discussion of different uses of EChOSim is given, including examples of simulations performed to assess the EChO mission.

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Section: The Echosim Simulatormentioning

confidence: 99%

Section: Use Of Echosimmentioning

confidence: 99%

EChOSim: The Exoplanet Characterisation Observatory software simulator

et al. 2015

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“…The degeneracy of solutions embedded in the current transit observations [95,100,105,159,161,187] inhibits any serious attempt to estimate the elemental abundances. New and better quality data are needed for this purpose.…”

Section: Exoplanets Todaymentioning

confidence: 99%

“…The frequency band over which the requirement applies is between 2.8×10 −5 Hz and 3.7 mHz, or~5 min to 10 h [60,122,127,187]. This implies having the capability to remove any residual systematics and to co-add the elementary observations from many repeat visits to a given target.…”

Section: Echo Performance Requirementsmentioning

confidence: 99%

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The EChO science case

et al. 2015

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The discovery of almost two thousand exoplanets has revealed an unexpectedly diverse planet population. We see gas giants in few-day orbits, whole multi-planet systems within the orbit of Mercury, and new populations of planets with masses between that of the Earth and Neptune-all unknown in the Solar System. Observations to date have shown that our Solar System is certainly not representative of the general population of planets in our Milky Way. The key science questions that urgently need addressing are therefore: What are exoplanets made of? Why are planets as they are? How do planetary systems work and what causes the exceptional diversity observed as compared to the Solar System? The EChO (Exoplanet Characterisation Observatory) space mission was conceived to take up the challenge to explain this diversity in terms of formation, evolution, internal structure and planet and atmospheric composition. This requires in-depth spectroscopic knowledge of the atmospheres of a large and well-defined planet sample for which precise physical, chemical and dynamical information can be obtained. In order to fulfil this ambitious scientific program, EChO was designed as a dedicated survey mission for transit and eclipse spectroscopy capable of observing a large, diverse and well-defined planet sample within its 4-year mission lifetime. The transit and eclipse spectroscopy method, whereby the signal from the star and planet are differentiated using knowledge of the planetary ephemerides, allows us to measure atmospheric signals from the planet at levels of at least 10 −4 relative to the star. This can only be achieved in conjunction with a carefully designed stable payload and satellite platform. It is also necessary to provide broad instantaneous wavelength coverage to detect as many molecular species as possible, to probe the thermal structure of the planetary atmospheres and to correct for the contaminating effects of the stellar photosphere. This requires wavelength coverage of at least 0.55 to 11 μm with a goal of covering from 0.4 to 16 μm. Only modest spectral resolving power is needed, with R~300 for wavelengths less than 5 μm and R~30 for wavelengths greater than this. spectroscopy technique means that no spatial resolution is required. A telescope collecting area of about 1 m 2 is sufficiently large to achieve the necessary spectro-photometric precision: for the Phase A study a 1.13 m 2 telescope, diffraction limited at 3 μm has been adopted. Placing the satellite at L2 provides a cold and stable thermal environment as well as a large field of regard to allow efficient time-critical observation of targets randomly distributed over the sky. EChO has been conceived to achieve a single goal: exoplanet spectroscopy. The spectral coverage and signal-to-noise to be achieved by EChO, thanks to its high stability and dedicated design, would be a game changer by allowing atmospheric composition to be measured with unparalleled exactness: at least a factor 10 more precise and a factor 10 to 1000 more accurate tha...

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The phase 0/A study of the ESA M3 mission candidate EChO

et al. 2014

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EChO, the Exoplanet Characterisation Observatory, has been one of the five M-class mission candidates competing for the M3 launch slot within the science programme Cosmic Vision 2015-2025 of the European Space Agency (ESA). As such, EChO has been the subject of a Phase 0/A study that involved European Industry, research institutes and universities from ESA member states and that concluded in Exp Astron EChO is a concept for a dedicated mission to measure the chemical composition and structure of hundreds of exoplanet atmospheres using the technique of transit spectroscopy. With simultaneous and uninterrupted spectral coverage from the visible to infrared wavelengths, EChO targets extend from gas giants (Jupiter or Neptune-like) to super-Earths in the very hot to temperate zones of F to M-type host stars, opening up the way to large-scale, comparative planetology that would place our own solar system in the context of other planetary systems in the Milky Way. A review of the performance requirements of the EChO mission was held at ESA at the end of 2013, with the objective of assessing the readiness of the mission to progress to the Phase B1 study phase. No critical issues were identified from a technical perspective, however a number of recommendations were made for future work. Since the mission was not selected for the M3 launch slot, EChO is no longer under study at ESA. In this paper we give an overview of the final mission concept for EChO as of the end of the study, from scientific, technical and operational perspectives.

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Data analysis pipeline for EChO end-to-end simulations

Cited by 7 publications

References 35 publications

EChOSim: The Exoplanet Characterisation Observatory software simulator

EChOSim: The Exoplanet Characterisation Observatory software simulator

The EChO science case

The phase 0/A study of the ESA M3 mission candidate EChO

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