Overview of Korean Activities at Maidanak

2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)

Overview of Korean Activities at Maidanak

Myungshin Im(Seoul National University)


Background1997: Collaboration talk started when Prof. Shuhrat Ehgamberdiev visited Korea to discuss collaboration

2003.8: Prof. Sang-Gak Lee, Hyung Mok Lee, andChangbom Park, Hwankyung Sung visited Maidanak observatory.Memorandum of Understanding (MOU) was signed to provide 2 months/year access to 1.5m

2004 Summer: Dr. Mansur Ibrahimov, Abbas Aliev, et al.Visited Korea


Key MOU Items

• Annual contribution to the operating cost

• 2 Month per year access to 1.5m

• Provide a new observation equipment by 2005

• Consideration for a new telescope at Maidanak


Activities

2009 Summer: The 1st Maidanak User’s Meeting was held at Seoul National University

2006 August: Installation of SNUCAM (Seoul NationalUniversity 4k x 4k CCD Camera) at 1.5m

2006 Fall: Scientific observations with SNUCAM began


Spectral Instrument 4k x 4k CCD Camera (SNUCAM)

• Fairchild 4k x 4k, Back Illuminated CCD chip

• Cryogenic cooling (–108 C)

• 5 position 4-inch filter wheel

• Bessell UBVRI filters + H-alpha + SDSS ugriz (ARCSEC + KIAS) + Y + new filters

• 18’ x 18’ field of view

Scientific publications with SNUCAM: Please cite Im et al. (2010, JKAS, 43, 77)


Successful Installation of SNU4kCAM (2006. 8)

M15 M31


Limiting magnitude(1 hr, 5-sigma, Vega or AB)

August 30, 2007 2009 Seeing

(arcsec)

U … 23.9 1.0

B 25.0 26.3 1.0

R 24.5 25.8 0.9

I 22.6 23.9 0.8

Z … 22.7 AB 1.0

Y … 21.3 AB 1.0

SDSS: u ~ 22.4, g ~ 22.6, r ~ 22.6, I ~ 21.7, z ~ 20.9 mag (50% complete; Abazajian et al. 2004)


Scientific Programs

• Standard star campaign (Sung, H. + Lim, B.)

• Open cluster observations (Sung, H., Lee, S. G. )

• Exoplanet transit observations (Lee, S. G. + Kang, W., Yang, Y.)

• Globular cluster observations (Lee, H. M.)

• Extragalactic programs (Im, M. + Jeon, Y., Choi, C., Lee, I., Cho, Y., Ko, J., Kim, D., Hong, J.)


Observation Campaigns

• 2006. 8 (J. Ko, Y. Cho, M. Im) – Installation of SNU4kCAM + test observation of extragalactic field + M31 Microlensing

• 2006. 10 (C. Choi & Y. Cho) – Deep z-band observation of high redshift quasar candidates + Supernovae follow-up observation

• 2007. 6 (I. Lee, Y. Jeon, M. Im) – BRI imaging of AKARI NEP-Wide Survey field + Optical imaging of SNUQSO quasars

• 2008. 8 (C. Choi, Y. Jeon, M. Im) – Re-installation of SNU4kCAM + Y-band imaging of extragalactic fields

• 2009. GRB observations, Deep Imaging of SNUQSO quasars and high redshift quasar candidates

• 2010.


Programs for 2010

• Merging signature in Early-type galaxies and Type-1 quasars physical mechanism?

• The is- and iz-band observations of z ~ 5.5 quasar candidates

• Environment of supermassive black holes with M ~ 1010 M⊙


Merging Signatures

• 73% of early-type galaxies (Tomer et al. 2009)

• Early-type galaxies with optical-NIR color gradients (Ko & Im 2005; Duho Kim)

• Host galaxies of luminous Quasars (Jueun Hong)

: z < 0.15, MB < -22

(Tomer et al. 2009)


Binary QSO at z=0.111(SNUQSO 2319+4032; Lee, Im, et al. 2010)

Digitized Sky Survey Image

110”

27.3”


Binary QSO at z=0.111

Maidanak 1.5m/SNUCAM (4 hrs)


Binary QSO at z=0.111

Maidanak 1.5m/SNUCAM (4 hrs)2009 September 20-22

TidalFeature


• No BH with 1010 M⊙ at z ~ 6• But, BH with 1010 M⊙ at z ~ 5• BH with 1010 M⊙ are emerging at z ~ 5.5 Critical Era for understanding

SMBH growth• But, very few z ~ 5.5 QSOs are known

Shen et al. (2007)

?

Im et al.(2010)

AKARISDSS

Quasars at z ~ 5.5


Not many QSOs at z ~ 5.5 so far

• Because r-drop out technique cannot be applied to z ~ 5.5 QSOs

• Too much stellar contamination

Chiu, K. et al.(2006)


New Filters – is (ishort) and iz

is Y

z=5.5 z=6.5 z=7.0

iz


Expected number

• Over 4000 deg2 (UKIDSS LAS area), z_AB < 20 mag,

• 30 quasars at 5.2 < z < 5.8

• 90 quasars at 4.7 < z < 5.2


Publications (2007 ~)

• SCI publications: 6

• SCIE publications: 2 (JKAS)

• Others: 1 (PKAS)

• Master’s thesis: 2

• Conference presentations: ~20

• GCN Circulars: a few


Desired improvements

• Internet access

• Efficient data transfer method

• Stable power supply

• Regular cleaning/coating of the mirror

• Efficient communication

• Infrastructure improvements (building, etc)


Concluding Remarks

• SNUCAM on the Maidanak 1.5m is a powerful imaging tool

• Unique filters

• Improvement of the facility more use by Korean astronomers


Thank you

Overview of Korean Activities at Maidanak

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