2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Overview of Korean Activities at Maidanak
Myungshin Im(Seoul National University)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Successful Installation of SNU4kCAM (2006. 8)
M15 M31
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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.)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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.
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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⊙
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Binary QSO at z=0.111(SNUQSO 2319+4032; Lee, Im, et al. 2010)
Digitized Sky Survey Image
110”
27.3”
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Binary QSO at z=0.111
Maidanak 1.5m/SNUCAM (4 hrs)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Binary QSO at z=0.111
Maidanak 1.5m/SNUCAM (4 hrs)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Binary QSO at z=0.111
Maidanak 1.5m/SNUCAM (4 hrs)2009 September 20-22
TidalFeature
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
• 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
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
New Filters – is (ishort) and iz
is Y
z=5.5 z=6.5 z=7.0
iz
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
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
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Publications (2007 ~)
• SCI publications: 6
• SCIE publications: 2 (JKAS)
• Others: 1 (PKAS)
• Master’s thesis: 2
• Conference presentations: ~20
• GCN Circulars: a few
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Desired improvements
• Internet access
• Efficient data transfer method
• Stable power supply
• Regular cleaning/coating of the mirror
• Efficient communication
• Infrastructure improvements (building, etc)
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Concluding Remarks
• SNUCAM on the Maidanak 1.5m is a powerful imaging tool
• Unique filters
• Improvement of the facility more use by Korean astronomers
2010 June 21-22 The 2nd Maidanak User’s Meeting (UBAI, Tashkent, Uzbekistan)
Thank you
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