kmtnet 현황과계획 과학연구home.kias.re.kr/mkg/upload/ssg/03_srkim.pdf · 2015-01-28 · 6...
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KMTNet 현황과 계획, 과학연구
김 승 리
한국천문연구원 광학천문본부 변광천체그룹
우주탐사회 워크숍 2015년 1월
2
Development of the KMTNet System
Korea Microlensing Telescope Network
Three Identical Observing Systems
24-hours uninterrupted Monitoring of night sky at Southern Hemisphere
It has been installed at CTIO in Chile, SAAO in South Africa, SSO in Australia.
Budget
Development : ~25.4 Billion KRW
for 6 years from 2009 to 2014
Operation : 2.0 Billion KRW per year
from 2015
Project Overview
Telescope3
Wide Field Optical Telescope
Primary Mirror with 1.6m Diameter
Prime Focus type Reflector
Equatorial Mount
Effective Focal Length of 5160mm
Four Field Corrector Lenses
Delivered Image Quality of 1.0 arcsec FWHM under 0.75 arcsec seeing
Detector4
Large-Format Mosaic CCD camera
Four e2v Chips with 9k by 9k pixels
10x10 microns pixel
0.4 arcsec/pixel, 2x2 square degree
Field Of View (FOV)
High Quantum Efficiency of 80~90%
Cryogenic Cooling System
Filter Changer and Shutter5
Cassette-Style Filter Changer
Four Spectral Filters with 310x310mm square
Johnson-Cousins B,V,R,I and SDSS g,r,i,z filter sets
Bonn-Style Shutter
Sliding Shutter with 325x325mm square
Clear Aperture
6
Telescope Camera FOV Site Target
PanSTARRS 4x1.8m 1400M pixel CCD 7.0 deg2 Haleakala, USA All sky survey
MOA 1.8m 80M pixel CCD 2.4 deg2 Mt. John, New Zealand Galactic Bulge
KMTNet 3x1.6m 340M pixel CCD 4.0 deg2 CTIO – SAAO – SSO Galactic Bulge
SkyMapper 1.35m 268M pixel CCD 5.7 deg2 SSO, Australia All sky survey
OGLE-IV 1.3m 268M pixel CCD 1.4 deg2 LCO, Chile Galactic Bulge
LCOGT 2x2.0m,
10x1.0m, 14x0.6m16M pixel CCD
0.03 deg2
0.2 deg2
Haleakala – Canary –
CTIO – SAAO – SSO
Follow-Up Obs.
Exoplanet, GRB
0
2
4
6
8
10
0 2 4 6 8 10
Wide Field Survey System
KMTNet Sites7
SAAO
SSOCTIO
KASI
KMTNet Sites8
CTIO SAAO
SSO
9
Data Process
Image Process and Photometric Database
Automatic Image Process Pipeline has been developed.
Difference Image Analysis (DIA) will be applied to the Bulge Monitoring Data to search for any variable objects.
Photometric Database for variable objects will be updated in 1~2 days after the observation and be used for light curve modeling.
Raw observation images of 560TB, processed images of 2.24PB, and photometric database of 200TB are expected for 5 years.
10
Installation of the First Telescope at CTIO in Chile
Finished the installation on May, 2014
Test observation for ~4 months using a pre-science 4K CCD camera
Current Status
11
Installation of the Second Telescope at SAAO in South Africa
Finished the installation on July, 2014
Test observation for ~4 months using a pre-science 4K CCD camera
Current Status
12
Installation of the Third Telescope at SSO in Australia
Finished the installation on Nov, 2014
Under the test observation using a pre-science 4K CCD camera
Current Status
13
Development of 18k Mosaic CCD camera
Under the test observation of the first and second cameras at two sites
The third camera is assembling at laboratory in OSU, USA
Current Status
14
Current Status
Test run of galaxies on 20 January, 2015 at CTIO. 120 sec exposure with I filter
FOV ~ 6x6 arcmin2
FWHM~1.0 arcsec
212”
373”
15
Detection of micro-Gravitational Lensing events
Monitoring the Galactic BulgeDiscovery of extra-solar planets
Main Sciences
16
Main Sciences
29%
65%
2% 2% 2% Radial Velocity
Transit
Imaging
Timing
Microlensing
17
Galactic Bulge Season (Red)
Search for Extra-solar Planets, especially, Earth-mass Planets in the Habitable Zone
Survey of Transiting Planets and Variable Stars
Non-Bulge Season (Blue)
Seven observation programs has been selected on 2012 and will be performed for 5 years from 2015
Survey of Supernovae
Survey of Asteroids and Comets especially, Near-Earth Objects
Multiband Photometry of External Galaxies
Others (e.g. Collaboration with Host Countries, Director/Maintenance Time)
Exo-Planets
Variable Stars
Asteroids
Comets
OthersGalaxies
Supernovae
Sciences
18
Development of the System
2015.02: Science run of the first CCD camera at CTIO in Chile
2015.03: Science run of the second CCD camera at SAAO in South Africa
2015.04: Science run of the third CCD camera at SSO in Australia
Short-term Schedule