A1261037722dSURs

1
SUBARU Instrument Status and Prospects Hiroshi
TERADA and the members from Science Operation
Division
New CCD Upgrade
Major Problem and Upgrade of MOIRCS
Suprime-Cam Project Status Final evaluation
and performance confirmation is on-going
Readout time 20sec (detailed
tuning planned) Readout noise 5e-
Preparation done for testing on Hilo
simulator Schedule Plan 2008 Early Jun
Start to replace into the new CCDs system
after the last observing run. 2008 Late July
Engineering run For up-to-date detailed
information, please refer to
http//subarutelescope.org/Observing/Instruments/S
Cam/upgrade.html.
MOIRCS Main Issue Operating Engineering grade
array on Channel-1 due to array problem.
Characteristics of Channel-1 array Ring
shaped anomaly on dark frame High dark
current ( 20e- / sec) High reset
anomaly for the first image High noise
level and latents Sensitivity, linearity,
readout noise As long as the anomaly region
is avoided, Note Although
performance level of the normal regions is as
good as Channel-2, the anomaly region spreads
over almost the entire array. Therefore, special
caution should be paid if Channel-1 data is
used. For more detail information, please
refer to http//subarutelescope.org/Observing/In
struments/MOIRCS/chip1info.html. Upgrade High
Dispersion VPH Grisms (R3,000 _at_ J- and H-bands)
Will be open to public use from S08B (limited
number of proposals) Note that the
sensitivity curve highly depends on the slit
position
Q.E. 1 Non-Linearity Readout Noise
Ch.1 75 74,000e- 27.7e-
Ch.2 82 110,000e- 29.5e-
FOCAS Project Status Purchase of CCD chips is
on-going. CCDs will be the same as the ones
for Hyper-SuprimeCam. Thickness of the
depletion layer gt TBD (200um or 300um) ?
t300um better sensitivity, less fringe in red,
but worse image quality Schedule Plan
2008/05,06 Delivery of New CCDs --2008/09
Evaluation of the new CCDs fabrication of new
dewar --2009/03 Assembly, control software
check, and laboratory test --2009/08
Engineering run
VPH grism (J)
Newly Opening of AO188
IRCSAO188
Status Will be open from S08B (Shared risk)
with limited nights, proposals, and functions
ImageRotator in AO188 is brand-new. ?
Caution needed for image rotation.
Prospects Open after S09A Finer pixel
scale (12.5mas/pix gt1.8um) Coronagraph mask
(0.2, 0.5, 0.8) Polarimetry (0.9-5.5um)
Recoating ImageRotator at NsIR ? Better
sensitivity for IRCS _at_ thermal band High
Resolution Upgrade Status Ion beam
dry-etching method established for Si
immersion grating
Coronagraph mask
F-conversion Optics
Si Immersion grating
High Resolution Spectrograph Unit
Test piece for Si immersion grating and its
performance
No Major Status Change
HDS Status Continue stable operation in 2007.
To ensure high precision spectroscopy,
detailed evaluation and investigation of
linearity is on-going.
COMICS Status Four cold head failures on the
imaging side occurred during S07A B. ? its
cause is still under investigation Now stable
after replacing all the components related to the
cooler.
SUBARU USERS MEETING 2007
NAOJ in Mitaka 2008/01/30,31