Science

Euclid Reference Publications: the Euclid Instruments

Consortium, ESA, Publication, Science, Telescope and instruments / By

In our mini-series about the Euclid Consortium’s set of new reference papers we are now turning to instrument descriptions: Paper 2 (Euclid. II. The VIS Instrument, Euclid Collaboration: Cropper et al. 2024) describe the VIS instrument, papers 3 and 4 (Euclid. III. The NISP Instrument, Euclid Collaboration: Jahnke et al.; Euclid. IV. The NISP Calibration Unit, Euclid Collaboration: Hormuth et al.) the NISP instrument.

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Euclid Reference Publications: the Flagship Simulations

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In our final post on the Euclid Consortium’s new set of reference papers we are turning to an essential part, the final ingredient to enable Euclid’s cosmology goal: Paper 5 (Euclid. V. The Flagship galaxy mock catalogue: a comprehensive simulation for the Euclid mission, Euclid Collaboration: Castander et al. 2024) is about the newly completed cosmological simulation, the Euclid Flagship Simulation, providing a fully-controlled input for testing and characterising the Euclid science pipeline.

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First Early Release Observation science and reference paper release

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Euclid survey operations have only started in February, and tuning the science data pipeline will take several more months. The first results from Euclid’s wide and deep main surveys will take until fall, first cosmology papers at least until late 2025.

However, before Euclid’s surveys started, the special ‘Early Release Observation’ (ERO) programme was initiated by ESA. A call was made to propose astronomical targets and connected science cases to showcase the capabilities of Euclid and its two instruments, VIS and NISP. A selection was done, 17 targets were observed in November and December 2023, and today, May 23rd, 2024, ESA and the Euclid Consortium has published the first ERO science results!

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Cutout of throughput change when warming up mirror during first Euclid decontamination campaign.

Euclid successfully de-iced, gains 15% sensitivity

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Every space mission starts on Earth, in humid air and warm temperatures. After launch all satellites are then exposed to the vacuum of space, all air just rushes out, and everything cools down fast, to freezing temperatures of -150°C in the case of the Euclid space telescope. Once in space all that is left is the metal and Silicon Carbide and other materials that the instruments are made of. And a bit of water – which has consequences if it ends up as a thin layer on mirrors or lenses. Euclid just successfully removed ice and gained 15% of light transmission.

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Euclid successfully de-iced, gains 15% sensitivity Read More »

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