CTA, with focus on LSTTeV Gamma Ray Astronomy
Masahiro Teshima
ICRR, The University of Tokyo
Max-Planck-Institute for Physics

GeV/TeV Gamma-Raydetectors
MAGIC-IIFermi Gamma-Ray Satellite

VERITAS
HAWC

HESS-II

CTA Telescopes
Array Configurations
CTA Observatory consists of two sites, Chile Paranal and Spain
Canary Island to coverall sky.

0-500500

1000500

1500

CTA South
Paranal, Chile-5000500

LST 23m (8MEuro) Low-Energy-1500-1000-5000

CTA North
La Palma, Spain-1500-1000-5000500

LST (N 4, S 4)
MST(N15, S25)
SST (N15000, S70)1000

MST 12m (2.5MEuro)
Mid-Energy

SST 4.3m(0.5MEuro)
High-Energy

CTA North and South Array
Sensitivity x10, Angular Resolution x2
Energy Range > 20GeV

100 hrs

GRBsAGNs

CTA-LST array contributes to the sensitivity in low energies>20GeV Threshold Energy
Distant AGNs are observable up to z=2
X10000 sensitivity for GRBs and AGN flares than Fermi
First firm observation of GRBs from groundTimeline of CTA Project
4LST Array will comeImaging Cherenkov
Telescopes# of Photons:50photons/m2 at 1TeV

T1T３ Energy range
 CR Rejection
 Angular Res.
 Energy Res.
 Effective Area
 Sensitivity

T２T４

20GeV ~ 300TeV~99.9%~0.02 degrees~10%~106m2~0.1% Crab Flux
(10-14 erg/cm2s)

TeV ガンマ線からの空気シャワー

Proton からの空気シャワー

MAGICMovie

なぜガンマ線を観測するのか？
宇宙線の源を探る

見かけの方向宇宙線

ガンマ線は直進する

宇宙線 + X ->  + X‘

0 -> ガンマ線

Science with CTA
Energy frontier of Astrophysics

Origin of CR
UHECR

Cosmic Accelerators

Super Massive
Blackhole

Dark Matter Origin of Cosmic Rays (Cosmic Accelerators)

Extragalactic

 High Energy Phenomena around Blackholes Gamma Rays from Dark Matter Annihilation

AGN

Gamma Ray Bursts

Galactic Sources

TeVCAT

Super Nova Rem.

Binaries
11

Shell Type Super Nova Remnants are identified ascosmic ray sources~30,000 yrs
Cas-A (300yrs)~3000yrs~300yrs
RXJ 1713 (2,000yrs)

CTA
From S.Funk We need 200-300 SNRs to explain the energetics of galactic
cosmic rays
 What is the maximum attainable energy with SNRs

W51 (35,000yrs)

Super Massive Black Holes 〜108 M◎
Candidates Sources for >1018eV Cosmic Rays

 What is the Maximum Energy?
 Can reach to 1020eV?
 Energy source is accretion disk orrotation energy of Black Hole?
 Explore Black Hole sub Horizon

Red closed circles are Super Massive Black Holes
observed MAGIC, HESS, and VERITAS

M87

Plasma Jet has a speed of 99% light velocity

IC170922A / TXS 0506+056
Ice Cube Observation (~300TeV)

Lepto-Hadronic Scenario

MAGIC Observation
Fermi LAT Observation (GeV) (>100GeV)

VERITAS Obs.

GTC Observation z = 0.3365
S. Paiano etl al 2018

CTA is the ultimate survey machine
observing the early Universe up to 1.6 billion
years after big bang (z<2.0)

Visible Universe with VHE
Gamma rays now

Universe 9 billion years after Big Bang

CTA will expand thevisible Universe

Universe 3 billion years after Big BangGRBs: good targets for CTA-LSTs
Study the newborn baby black holes
CTA Simulation(Template GRB080916C)

Bulk Lorenz Factor 100−1000

Toward the discovery of Dark Matter

Interaction probability

Complementarity with different approaches

Xenon 1ton
(Underground exp.)

LHCCTA(Gamma Rays)(Accelerator)

Mass of DM
 Explore Dark Matter in the Galactic Center and DwarfSph. Galaxies
 CTA has the best sensitivity above 700GeV

持帰不可

高感度での暗黒物質探索
質量領域Mχ:200GeV - 10TeV

素粒子物理項対消滅で放出されるガンマ線は1/10 Mχにバンプを作る
20GeV – 1TeV 領域でのガンマ線観測が重要

宇宙天体物理項CTA は、銀河中心、矮小楕円銀河の観測により理論的な予測より厳しいリミットを与える

CTA North at ORM
Observatorio del Roque de los Muchachos

CTA North
Array Configurations
CTA Observatory consists of two sites, Chile Paranal and Spain
Canary Island to coverall sky.

CTA North
La Palma, Spain

LST 23m Low-Energy

MST 12m
Mid-Energy

Focal Plane Instr.
Electronics (JP/IT/ES)
Camera body (ES)Camera Supporting
Structure (FR/IT)

CTA-LST Project : Big International Effort
BR(Brazil), CH(Switzerland), DE(Germany), ES(Spain), FR(France),IN(India), IT(Italy), HR(Croatia), JP(Japan), SE(Sweden)

Mirror (JP)Interface Plate(DE/BR/JP)
Actuator (JP/CH)
CMOS-Cam (JP)Star Guider (SE)Calibration Box (IN/IT)

Flywheel, UPS (JP)Computers, network (JP)INFRA (ES)

Structure (DE/ES)
Access Tower (DE/ES)
Drive (ES/FR)
Bogie (ES/DE/IT)
Rail (ES/DE)
Foundation (ES)LST1 construction
Dish installed on the understructure, Dec 4, 2017

LST1 constructionVery good test for the ice load
No damage after ice storm Feb 6, 2018

CTA LST1 Construction
Dummy CSS for balancing
Dummy CSS installed 17 Feb. 2018

Status of LST1 construction
Camera mechanics finishedNov 2017

IT computer center installed, 2k Cores, 3PB

Dec 2017

Backplanes of the camera installed

Power and Network readyDieselATS, Transformer

Jan 2018

Mar 2018

500kW Flywheel Power Units

The LST-1 Site
on 11. May 2018

LST1 with 123Mirrors

Camera Access Tower
Energy Containers
UC2-UC4 (500kW/each)

IT Container
2000 core, 3PB

Camera Access Tower Upper partCamera Access Tower

198 Mirrors for LST1
The Radius of Curvature of mirrors
as a function of distance of the center

Red: Individual mirrors
Blue: ideal parabola

198 Mirrors are brought to the LST1 site

Preparation of Interface Plates andActuators in MIRCA
Assembled Interface plates and Actuators

LST1 construction
Installing Mirror Interface Plates and actuators

3 March 2018

Interface Platesand Actuators

Flywheel Energy Container
50kW  400kW boosterMirror Installation

Special offer for you:
We can put your name with 5kEuro

23 May 2018
181 mirrors

Camera Supporting Structureby LAPP/IN2P3
Camera support structure :• production : finished• Trial mounting : done in February• Shipment : in progress• Expected arrival date on site : 21 May

Camera Supporting Structureon the trailer

LST1 Status 2018.06.22
Camera Support Structure ArchIntegration and final test on-goingat IFAECTA North IT System
2000 cores, 3PBytes

InsideCTA North Computing System
2000 cores, 3PB storage

100GBICRRIT Container
Frontal side
Rear SideInside

28 June 2018

Camera Access Tower

IT Container
2000 Core, 3PB

CTA-N INFRA in Phase 1

Phase 1 Schedule:
Detailed Design 2018 Q2-Q3
Start the Construction 2019 Q2Telescope installation 2020 Q2

Summary• The construction of LST1 is going very smooth• So far we did not see any major problem in the LST1
construction and also LST components• We expect the first light in Sep 2018

• LST2-4 will come in 2018-2021• October 10, 2018, Inauguration of LST1 isscheduled
Breaking News: Large Size PACMAN showed up
at ORM, La Palma Canaries on 11th of May 2018 !!

IT Container
Frontal sideRear SideInside