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Published byElfreda Shepherd Modified over 8 years ago
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Current Status of FMOS and Schedule Toward the Common Use Naruhisa Takato
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What is FMOS? Fibre Multi-Object Spectrograph wavelength coverage: 0.9 – 1.8 um FOV: φ30 ‘ 400 multiplicity OH – airglow suppression spectral resolution: R=500 & 2200 expected limiting magnitude: ( 1 hour, S/N=5) J = 22.3, H = 20.9
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A Quick History of FMOS 2000 : project approved design and development of - Fibre positioner (Echidna): AAO - Prime Focus Unit (PIR): Kyoto/NAOJ - Spectrograph IRS1: Kyoto/NAOJ, IRS2: Oxford, RAL (UK) - F5 fibre: Durham (UK)
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A Quick History of FMOS 2005/07, 10 1 st and 2 nd PIR test on telescope - Corrector was offseted/tilted, but could not correct it because corrector could move only along 1-axis and… - PIR cable wrapper broken mechanically Cable wrapper and corrector moving mechanism were re-designed and newly fabricated.
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Photo: M. Kimura
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IRS 1( Univ. Kyoto)IRS 2( UK) TUE-IR / Subaru
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F5 fibre installation
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Current Active Members Hawaii M. Akiyama, N. Tamura, M. Kimura, P. Tait, N. Takato Kyoto F. Iwamuro, T. Maihara, K. Ohta Oxford Univ., Univ. Durham, Rutherford Appleton Lab. (UK) Anglo Australian Observatory (AU)
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Progress in FMOS engineering Obs. - Coma aberration can be canceled by adjusting corrector lens using SH wavefront measurement - optics: 0.3-0.5 arcsec, - actural image size (incl. seeing): 0.8-1” - telescope distortion modeling: 0.8” rms => 6 stars were acquired at the same time in AG fiber - Obtained Sky spectrum
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Stellar images in AG fibre
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A Tentative Schedule Toward Open Use 2007/12 : PIR test on the telescope (I)(II) 2008/01 : Echidna test on the telescope (I) 2008/02: refine Echidna and Spectrograph control on the telescope(II) 2008/05: IRS1,2 test (I) 2008/06: IRS1,2 test (II) 2008/08-: tune-up the total system 2008/12? - : start GT? 2009/06 : provide maintenance document 2009/08??: start Open Use
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… need stable instrument for open use
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