The miniJPAS survey: A preview of the Universe in 56 colors

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Table 1.

Main technical characteristics of the JST/T250 telescope.

Mount:	Altazimuthal
Optical configuration:	Ritchey Chrétien modified,
	equipped with a field corrector
	and rotator
M1 diameter:	2.55 m
Field corrector:	3 aspherical lenses
Effective collecting area:	3.75 m²
Focus:	Cassegrain
F#:	3.5
Focal length:	9098 mm
Plate scale:	22.67 arcsec mm⁻¹
FoV (diameter)	3.0 deg
Étendue:	26.5 m² deg²
EE50 ^(a) (diameter, as-built)	12 μm
EE80 ^(a) (diameter, as-built)	25 μm

Notes.

^(a)

The encircled energy (EE) indicates the fraction of energy contained in a circular aperture of a given radius. In this case, EE50 and EE80 indicate the radius of the circular aperture encompassing the 50% and 80% of the energy.

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