(45mユーザーの観点から) 45活用術：2020年までにしたい4つのこと

45活用術：2020年までにしたい4つのこと
Four things to do until 2020 to make the best of the 45 m
Yoichi Tamura (IoA, UTokyo)
NRO User’s Meeting 2014
24 Jul 2014
1
Four things?
Science
Test bench
Education /
Training
Think next
2
My standpoint?
❖ as a user in a broad meaning (FMLO development,
education/classes at UTokyo, next-generation SD telescope)
❖ High-z studies w/ ASTE/NMA/ALMA
❖ in a self-checking and encouraging view point.
❖ I won’t present my own studies, but will kick things off to
share the issues with you and to look for the way to go with
the 45m.
❖ Boundary conditions
❖
❖
Human/financial resources are very limited
going to shrink/shutdown in ~10 yr
3
(1) Science
Do it yourself!
But after being screened properly.
4
(1) Science
❖ 1. Accepting challenging and/or strategic proposals
❖
e.g. Optical/NIR mid-class (or even 8-m class) telescopes in the TMT/
E-ELT era (cosmological surveys with UKIRT, CFHT, CTIO), 1-m class
robotic telescopes, coordination network among Japanese universities
❖ 2. Operating the legacy programs properly
❖
Construct a concrete scientific plan from feasibility studies (hardware/
software development, reduction strategies, appropriate personnel) to
publications!
❖
❖
Clarify the policy of data release!
How many Ph.D./M.S. projects have been involved?
❖ 3. Attempting a new framework of call for proposals
❖
❖
E.g., monthly call at CARMA, as a window to pilot/TOO studies
Call for PI instrument proposals?
5
(2) Test bench
❖ Use the 45 m as a testing platform to try selected items
relevant to the “next”
❖ e.g. large-format bolometer array, FTS/filter-bank spectrograph,
polarizer, holography, metrology, calibration/scan
❖
Do not remember the resources are very limited.
❖ Proper coordination between the observatory and users /
proper review by SAC, etc.
❖ Letter of intent (e.g. DESHIMA/ASTE/UTokyo), call for proposals
6
Example: FMLO
(Frequency-Modulating Local Oscillator)
❖ Highly accessible test bench (compared with ASTE)
❖ Bring resources with an external user
❖ Resources offered by 45m/NRO
❖
❖
❖
❖
Engineering schemes + research (Tatamitani-san)
Control system + administration (S. Takahashi-san, Maekawa-san)
Hardware (TZ+SAM)
Telescope time (2d+2d in 2013/14)
FMLO
(Upper sideband)
Position S/W
(Upper sideband)
tobs = 10.0 s
ton-source = 10.0 s
dTA* = 130 mK
tobs = 30.0 s
ton-source = 10.0 s
dTA* = 167 mK
2.2x more sensitive for fixed t(obs).
4.9x more efficient for fixed dTA*.
Position S/W
(Lower sideband)
FMLO
(Lower sideband)
7
(3) Education and training
Outreach
❖ What would you imagine when I tell
you “education/training” at 45m?
❖ to make/help a student graduate your
Undergrad
school/defend him/her thesis by
supporting him/her to take/reduce data.
❖
to transfer methodologies/knowledge of
operation/development to students/PDs/
technicians.
❖
to feedback scientific outcomes to the
general public.
❖
What I’m just receiving/learning from my
supervisor.
❖
I don’t care!
Grad. student /
Telescope user
Staff /
Telescope
developer
8
Old Paradigm
LSST and the future decade of
optical transient surveys
Tony Tyson
University of California, Davis
Astronomer+
pencil+paper
1
STELLANOVAE, CAPE TOWN SOUTH AFRICA, FEBRUARY 2013
INSTRUMENT
TELESCOPE
19
drawn from Tony Tyson’s viewgraph 9
New Paradigm
LSST and the future decade of
optical transient surveys
Tony Tyson
University of California, Davis
DATA ENABLED
DISCOVERY
1
STELLANOVAE, CAPE TOWN SOUTH AFRICA, FEBRUARY 2013
345 PB finally!! ←
(~1 GB/s)
INSTRUMENT
TELESCOPE
20
drawn from Tony Tyson’s viewgraph 10
Current Situation
in (Japanese) Radio Astronomy?
ALMA
SDs
Receivers
45m
SKA
45m
❖ Getting mature, rich in diversity of science/technologies!
11
Making the best of 45m for education
❖ Summer school / classes
❖
❖
❖
NRO summer school
(Titech,) JUEN, UTokyo
Mounting teaching materials
❖ Class @ UTokyo
❖
❖
“Don’t use the telescope just
as a black box”
4
$
$
$
! 
As a prototype of flow/cycle
of scientific research
proposal
❖ Legacy as a training room
❖
young people who will be
able to support existing
facilities / foster new ideas
based on existing facilities/
instruments.
(1)
(2)
12
Courtesy of Taniguchi-san
(4) Think next
❖ From NRO+ASTE to ALMA
❖
People who have been trained at NRO are now ‘workhorses’ in Chile:
K. Nakanishi-san, Kamazaki-san, Matsushita-san, Sawada-san,
Asayama-san, M. Sugimoto-san, Okuda-san, Sa. Takahashi-san,
Kurono-san, A. Hirota-san, (+M. Saito-san, Higuchi-san, Miura-san)
(as of 2014 Apr)
❖
Natural extension from NMA/ASTE, but what about 45m?
❖ What should be the successor to 45m/ASTE?
❖
From my own view point, ...
❖
❖
❖
From the success in the AzTEC/ASTE Survey
From the on-going developments of TESCAM + DESHIMA
From the hard battle (!) in the 45m High-z Legacy Survey (45m is
a “mapping telescope”!)
13
LST
Simulated Sky from SMG Surveys
(LST, CCAT, ASTE)
SZ clusters
Core Surveys
LARGE SUBMILLIMETER TELESCOPE
z=
z=
z=
Comoving Y
(h-1 Mpc)
z=
z=
LST
2-deg2 Survey
z=
z=
Comoving distance (h-1 Mpc)
Basic concept
✴
✴
✴
✴
Largest collecting area (D = 50m, 45 micron r.m.s.) @ ≤ 700 GHz
Wide FoV (0.5 deg.) @ ≤ 420 GHz
Wide frequency coverage, 70–950 GHz (up to 1 THz as a goal)
50 % of time in a year(1) capable for sub-mm observations (≦ 1 mm)
[Note 1: best ten months]
14
(4) Think next
❖ Key technologies with LST
❖
Large-format bolometer array, FTS/filter-bank spectrograph, polarizer,
holography, metrology, calibration/scan ==> need test benches
❖
45m? ==> New framework of call for proposals of PI instruments
❖ From 45m to 50m: Large Submillimeter Telescope (LST)
❖
「天文学・宇宙物理学中規模計画の展望第22期日本学術会議物理学委員会
天文学・宇宙物理学分科会」2013年12月25日
❖
「2.6.8 天文学・宇宙物理学分科会からのコメント（中略）学術コミュニティ
での合意状況：国内外の大学・研究機関の研究者との検討会合や国際ワークシ
ョップの開催や宇宙電波懇談会等での計画紹介を行ってきている。同じような
サイエンスを目指す外国のミリ波・サブミリ波望遠鏡計画である CCAT25m や
LMT50m 鏡計画に圧倒できるような優位性を持った計画にするよう、今後コ
ミュニティでの議論を深めてほしい。」
15
Summary
Science
Challenging / strategic proposals
Operating legacy programs properly
Attempting new framework
Using 45m in classes at universities
Legacy as a training room
Education /
Training
Test bench
Challenging / strategic proposals
Operating legacy programs properly
Attempting new framework
NRO to ALMA as a good role model
Large Submillimeter Telescope
Think next
16

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