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The new NESSI: refurbishment of an NIR MOS for characterizing exoplanets using the Hale telescope

NESSI (New Mexico Exoplanet Spectroscopic Survey Instrument) was originally conceived, designed and built under a NASA NM-EPSCoR funded effort as a near-infrared multi-object spectrograph for characterizing exoplanet transits at the Magdalena Ridge Observatory. With the help of funding from JPL, we are moving NESSI to its new home on the Hale telescope in early 2018. Salient features of the New NESSI include a 6.5 arc minute field-of-view, low (R~250) or moderate (R~1100) spectral resolutions across J, H and/or K bands, the ability to stare at transits with high frame-rates, and finally a suite of on-board filters for imaging applications. We present the new design of NESSI, lessons learned in the refurbishment process, as well as an update for next steps in the process.