SPIP is a new-generation near-infrared spectropolarimeter / high-precision velocimeter to be mounted at the 2m Telescope Bernard Lyot (TBL) at Pic du Midi de Bigorre, the French Pyrénées astronomical observatory (alt. 2877 m), by end-2024, and mostly copied from SPIRou in operation at the 3.6 Canada-France-Hawaii Telescope (MaunaKea, Hawaii, alt. 4200 m) since 2018. Observing in the 0.95-2.5 μm range (YJHK bands), SPIP, like SPIRou, will be dedicated to the detection and characterization of planetary worlds around nearby red dwarfs and to the study of how stellar magnetic fields impact star / planet formation. This paper presents the work performed on integrating and testing the cryogenic spectrograph unit (cooled down at 70K and thermally stabilized at 1mK), benefiting from both the robustness of SPIRou and the design improvements implemented for SPIP.
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