Gl 410, a red dwarf of 6th magnitude (at 1.7µm) with a surface temperature of 3200 °C, is one of the targets chosen for these guiding tests. Although the image of the star is distorted as a result of atmospheric turbulence, the 50 Hz tip-tilt system was shown to accurately maintain it on the entrance aperture at a precision of better than 0.01'' rms on 1 min intervals (© C. Moutou – CNRS/CFHT)
Time lapse of the spectrograph cryo-mechanics installation at the IRAP/P2IS plateform, in Toulouse
A new time lapse of the spectrograph cryo-mechanics full installation and cryostat closing in the SPIRou dedicated clean room, IRAP/P2IS plateform in Toulouse.
(©S.Etcheverry - OMP)
Closing of the SPIRou spectrograph before a new cooling cycle, in Toulouse @IRAP/OMP
(©SPIRou - IRAP/OMP)
The SPIRou Image Stabilization Unit (ISU) in action at 50Hz: the left panel shows the image of the artificial star kept well centered on the instrument entrance aperture while the star itself is moving randomly by as much as 0.5’’ rms over the exposure, whereas the right panel shows the ISU correction needed to maintain the artificial star well centered (green '+' signs for the 50 most recent corrections over the last second). Sudden image shifts occurring every minute (at t=41s in this movie) simulate the decentering effect of the wind, which the ISU is found to correct well. In average over the whole exposure the image of the artificial star is found to be centered on the hole down to a precision of 0.005'' to 0.01’’ rms, 5-10x better than the technical requirement.
(©S.Baratchart - IRAP/OMP)
Preparing the SPIRou spectrograph prior to the first cryogenic cycle at CFHT
(© S. Chastanet - CNRS/OMP)