The EChO payload instrument – an overview

The Exoplanet Characterisation Observatory (EChO) mission was one of the proposed candidates for the European Space Agency’s third medium mission within the Cosmic Vision Framework. EChO was designed to observe the spectra from transiting exo-planets in the 0.55–11 micron band with a goal of covering from 0.4 to 16 micron. The mission and its associated scientific instrument has undergone a rigorous technical evaluation phase. This paper provides an overview of the payload instrument design for the mission, showing how the system acts together to fulfill the mission objectives. We report on the results of an extensive simulation of the instrument performance and show that EChO would have been photon noise dominated for targets from a faint limit similar to GJ1214 to the brightest targets similar to 55Cnc.

[1]  Bruce Macintosh,et al.  Experimental Design for the Gemini Planet Imager , 2011, 1103.6085.

[2]  C.V.M. Fridlund.  The DARWIN project - An ESA cornerstone candidate mission , 2004 .

[3]  Bruce Swinyard,et al.  The phase 0/A study of the ESA M3 mission candidate EChO , 2015 .

[4]  Judith L. Pipher,et al.  Development of sensitive long-wave infrared detector arrays for passively cooled space missions , 2013, 1306.6897.

[5]  Enzo Pascale,et al.  Data analysis pipeline for EChO end-to-end simulations , 2014, 1402.4408.

[6]  M. R. Haas,et al.  Kepler Mission Design, Realized Photometric Performance, and Early Science , 2010, 1001.0268.

[7]  E. Agol,et al.  A TWO-DIMENSIONAL INFRARED MAP OF THE EXTRASOLAR PLANET HD 189733b , 2012, 1202.1883.

[8]  Simon Albrecht,et al.  The orbital motion, absolute mass and high-altitude winds of exoplanet HD 209458b , 2010, Nature.

[9]  David Charbonneau,et al.  A map of the day–night contrast of the extrasolar planet HD 189733b , 2007, Nature.

[10]  Maurizio Pancrazzi,et al.  The visible and near infrared module of EChO , 2015 .

[11]  Carl Christian Liebe,et al.  Accuracy performance of star trackers - a tutorial , 2002 .

[12]  Markus Loose,et al.  High-performance focal plane arrays based on the HAWAII-2RG/4G and the SIDECAR ASIC , 2007, SPIE Optical Engineering + Applications.

[13]  O. Boulade,et al.  The mid-infrared channel of the EChO mission , 2014, Astronomical Telescopes and Instrumentation.

[14]  R. Gilliland,et al.  Detection of an Extrasolar Planet Atmosphere , 2001, astro-ph/0111544.

[15]  A. Gould,et al.  Kepler Mission Design , 2005 .

[16]  Gert Finger,et al.  Mercury cadmium telluride focal plane array developments at Selex ES for astronomy and spectroscopy , 2014, Defense + Security Symposium.

[17]  Bruce Swinyard,et al.  Exoplanet atmospheres Characterization Observatory payload short-wave infrared channel: EChO SWiR , 2014, Astronomical Telescopes and Instrumentation.

[18]  Gautam Vasisht,et al.  The presence of methane in the atmosphere of an extrasolar planet , 2008, Nature.