Led_Zep SuperJovian
Number of posts : 721 Location : France Registration date : 2011-09-09
| Subject: ExTrA (Exoplanets in Transits and their Atmospheres) 20th May 2017, 5:07 pm | |
| https://www.eso.org/public/unitedkingdom/teles-instr/lasilla/extra/?langExoplanets in Transits and their Atmospheres ExTrA employs a novel approach to the transit method; it observes at infrared wavelengths, where M dwarfs are brighter, and adds spectral information to the usual photometric measurements. Its three telescopes collect light from the target and from four comparison stars; the light is then fed through optical fibres into a near-infrared spectrograph. In this cost-efficient approach, the light from all three telescopes is fed into just one multi-object spectrograph. This innovative approach of adding spectroscopic information to traditional photometry helps to correct the disruptive effect of Earth’s atmosphere, as well as errors from instruments and detectors. In addition, M dwarfs appear much brighter at infrared wavelengths — increasing the precision achievable and boosting the survey’s efficiency. | |
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Led_Zep SuperJovian
Number of posts : 721 Location : France Registration date : 2011-09-09
| Subject: Re: ExTrA (Exoplanets in Transits and their Atmospheres) 24th January 2018, 11:09 am | |
| http://www.eso.org/public/unitedkingdom/news/eso1803/?langFirst Light for Planet Hunter ExTrA at La SillaA new national facility at ESO’s La Silla Observatory has successfully made its first observations. The ExTrA telescopes will search for and study Earth-sized planets orbiting nearby red dwarf stars. ExTrA’s novel design allows for much improved sensitivity compared to previous searches. Astronomers now have a powerful new tool to help in the search for potentially habitable worlds | |
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