First-lights of SWIMS and MIMIZUKU on Subaru - TAKAFUMI KAMIZUKA (IOA/UT) ON BEHALF OF TAO GROUP

First-lights of
SWIMS and MIMIZUKU
on Subaru
TAKAFUMI KAMIZUKA (IOA/UT)
ON BEHALF OF TAO GROUP

TAO Project

TAO: The University of Tokyo Atacama Observatory
   Constructing a 6.5-m infrared telescope
   at the summit of Co. Chajnantor in Chile (5640-m alt.)
Purpose: Giving opportunity to young researchers
         to make Survey or Challenging studies.

Engineering observations
      of TAO’s instruments on Subaru
          NIR Instrument: SWIMS             MIR Instrument: MIMIZUKU

These are the 1st gen. instruments for TAO.
                                                               Accepted
Eng. obs. prior to the completion of TAO were proposed.
                                                               in FY2016.
to secure their smooth startup of science operations on TAO.

SWIMS : 1st Gen NIR
Instrument for TAO 6.5m

Simultaneous-band Wide field Infrared
MOS Spectrograph
 Simultaneous imaging/spectroscopy
  in 2 bands (0.9-1.4 μm & 1.4-2.5 μm)       Slit mask
 Wide field-of-view with good pixel           or IFU
  resolution
  9.6’ Φ FoV, 0.126ʺ/pix,
  with 4k x 4k pixels (on TAO 6.5m)
 Multi-object spectroscopy with
  cooled multi-slit masks
  0.9-2.5 μ m simultaneous
  spectroscopy for ~30 objects (R~1000)
  IFU module also under development
 2m x 2m x 2m, 2.4ton

    First-light was achieved in May, 2018.               HAWAII-2RG
                                                         x4 for each

First Light : 2018/5/30

          JHKs three-color composite of S106

Courtesy : I. Tanaka

Imaging Performance

    Image Quality
        Best Seeing 0.37”@Ks 30sec
        0.095”/pix, FoV 6.4’ x 3.2’
        Distortion < 1pixel over the full FoV

    System Efficiency (incl. telescope)
        Detector 2 in blue-arm has lower QE

            System efficiencies in blue-arm
Filter             Detector #1         Detector #2
J                  0.31                0.23
H                  0.48                N/A (0.41)
Ks                 0.41                N/A (0.34)

Long Exposure Test : Jan. 2019

    No major problem found with ~1hr integration
    Preliminary Result
     : NB1261 imaging in 2019/Jan run
        Z=0.9 Large Scale Structure Field
        66min integration (2min x 33fr.)           4C65.22
        LimMag=21.8AB (3σ, 1.3”apert.)
           in good agreement with
            prediction of 22.0AB
        No strong crosstalk

Courtesy : T. Asano (Tohoku => U. Tokyo)

MOS First Light : Jan. 2019

   All the hardware / software
    work properly
       Slit Introduction : ~15min
       No need to point to zenith    0.9-1.4um
        during MOS slit exchange      raw spectra

                                      1.45-2.5um
    Paα emission of a z=0.15 merger   raw spectra

Summary and Future Plan

   SWIMS has been commissioned at Subaru Telescope
    in FY2018

   Both imaging and MOS spectroscopy are
    functioning well.

   Proposing to serve to the community as a PI
    instrument at Subaru for S20A-S21B

   It will then move to TAO 6.5m telescope.

MIMIZUKU : 1st Gen MIR
Instrument for TAO 6.5m

Mid-Infrared Multi-field Imager for gaZing
at the UnKnown Universe
   Wide wavelength coverage: 2–38 µm
       Imaging and Low-res. Spectroscopy
   High Spatial Resolution: ~1” @ 30 µm

   Accurate calibration of the telluric
    atmospheric absorption

                                                        MIMIZUKU
                                             (2.0 m x 2.0 m x 2.1 m; 2.4ton)

Field Stacker (FS)

                                               Telescope

Placing two movable pick-up mirrors on the telescope focal plane.
 Simultaneous observation of target and reference star.
 Compensate time variation of the atmosphere.  Accurate calibration!!
          Test this device in the engineering observation!!

First Light : 2018/7/3

MIMIZUKU on Subaru

                                        α Her (off-focus)

                     Moment of the FL

Normal Imaging Observation

N-band Image         Q-band Image
       (Log-scale)        (Linear-scale)
                                                        FWHM Sys. Eff.※
                                           N-band
                                                          0.32”               18%
                                           @ 11.6 µm
                                           Q-band
                                                          0.59”              2.1%
                                           @ 20.8 µm
α Her @ 11.6 µm      α Hya @ 20.8 µm                   ※ Sys. eff. incl. tel. and sky

  • Diffraction limited image is achieved
  • Acceptable system efficiencies are confirmed
     Low Q-band efficiency is due to sky condition?
                               Working almost as expected.

Field-Stacker Observations

    Imaging                                         Spectroscopy

         Field-Stacker observation of V582 Cas & V530 Cas
         (Angular separation: 4.3 arcmin)

Target acquisition software works well
• Targets can be introduced with one command
• Target positions can be adjusted graphically

Field-Stacker Observations

• Photometric counts show global fluctuation (~10%)
• But their ratio can be measured with a few % accuracy
We can compensate the atmospheric variation by using Field Stacker!!

Summary and Future Plan

   MIMIZUKU has been commissioned at Subaru
    Telescope in FY2018

   All observation modes are functioning well

   Field Stacker successfully compensates the time
    variation of the atmospheric absorption

   MIMIZUKU will be transported to TAO in FY2019

Summary

   SWIMS and MIMIZUKU have completed their engineering
    observations on Subaru
   We confirmed that all observation functions are working well

   SWIMS team is proposing science operation on Subaru for S20A–S21B.
   MIMIZUKU will be transported to TAO in FY2019.

   First-light of TAO/MIMIZUKU will be 2020 – 2021.
    First-light of TAO/SWIMS will be after 2022.

          We would like to thank all Subaru staff !!