KASINICS: Near Infrared Camera System for the BOAO 1.8a€‰m Telescope

摘要

WedevelopedKoreaAstronomyandSpacescienceInstitute(KASI)NearInfraredCameraSystem(KASINICS)tobeinstalledonthe1.8a€‰mtelescopeofBohyunsanOpticalAstronomyObservatory(BOAO)inKorea.Weusea512$$ imes$$512InSbarray(AladdinIIIQuadrant,RaytheonCo.)toenable$$L$$bandobservationsaswellas$$J,H$$,and$$K_s$$bands.Thefield-of-viewofthearrayis3$${ lap{hskip.75pt{^prime}}hskip.75pt.hskip1pt}$$3$$ imes$$3$${ lap{hskip.75pt{^prime}}hskip.75pt.hskip1pt}$$3witharesolutionof0$${ lap{hskip.75pt{^{primeprime}}}hskip.75pt.hskip1.75pt}$$39$$/$$pixel.WeadoptanOffnerrelayopticalsystem,whichprovidesacoldstoptoeliminatethermalbackgroundemissionfromthetelescopestructures.Mostpartsofthecamera,includingthemirrors,weremanufacturedfromthesameingotofaluminumalloytoensureahomologouscontractionfromroomtemperatureto80a€‰K.Wealsodevelopedareadoutelectronicssystemforthearraydetector.Basedonpreliminaryresultsfromtestobservations,thelimitingmagnitudesare$$J=$$17.6,$$H=$$17.5,$$K_s=$$16.1,and$$L$$(narrow)$$=$$10.0a€‰magatasignal-to-noiseratioof10foranintegrationtimeof100a€‰s.