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Overview of FMOS Deployment and Future Plans

Learn about the current status, development history, active members, and engineering progress of the Fibre Multi-Object Spectrograph (FMOS), a groundbreaking instrument for astronomical observations. Explore the wavelength coverage, field of view, multiplicity options, spectral resolution, and expected limiting magnitude to understand the capabilities of FMOS. The article also provides insights into the tentative schedule for open use, highlighting key testing phases and system refinements slated for the coming months.

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Overview of FMOS Deployment and Future Plans

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  1. Current Status of FMOSand Schedule Toward the Common Use Naruhisa Takato

  2. 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

  3. 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)

  4. A Quick History of FMOS • 2005/07, 10 1st and 2nd 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.

  5. Photo: M. Kimura

  6. IRS１（Univ. Kyoto) IRS２（UK) TUE-IR / Subaru

  7. F5 fibre installation

  8. 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)

  9. 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

  10. Stellar images in AG fibre

  11. 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

  12. … need stable instrument for open use

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