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June 30 , 2010 Nanning, Guangxi

NAOC and Steward Observatory of UA The South Galactic Cap U-band Sky Survey with Bok 2.3m Telescope. Fan Zhou (NAOC). June 30 , 2010 Nanning, Guangxi. Why do we need the survey?. To supply the input source catalogue for LAMOST;

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June 30 , 2010 Nanning, Guangxi

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  1. NAOC and Steward Observatory of UA The South Galactic Cap U-band Sky Survey withBok 2.3m Telescope Fan Zhou (NAOC) June 30, 2010 Nanning, Guangxi

  2. Why do we need the survey? • To supply the input source catalogue for LAMOST; • To classify of the stars, galaxies, AGN and quasars in the south Galactic cap region with the color-color diagram; • To detect the red shift z<3 quasar candidates combining the photometry in other bands; • To estimate the red shift of the galaxies with PhotoZ combining the photometry in other bands; • To find out some starburst galaxies candidates; • It can help us estimate the metallicity of the stellar populations in the galaxies; • To identify the type of the stars in the color-color diagram combining the photometry in other bands, which can help us the control the completeness of the star type for the LAMOST observations; • It can be helpful for the flux calibration of the LAMOST spectra.

  3. Science 图1：SDSS测光中的恒星（×），星系（△）和类星体（其中红移z< 3.5的源用□表示，红移z≥ 3.5的源用■表示）的双色图。 图2：不同类型的恒星在双色图上的位置是不同的

  4. Science • 图1：BC03模型中太阳金属丰度下星族的谱能量分布随年龄的变化。

  5. Project Members PI: Xu Zhou(NAOC) PI: Michael Lesser (SO/UA) Yipeng Jing(SHAO) Zhaoji Jiang(NAOC/PKU) Xuebin Wu(PKU) Weipeng Lin(SHAO) ShiyinShen(SHAO) Zhou Fan(NAOC) ZhenyuWu(NAOC) ……. Edward Olszewski(UA) Xiaohui Fan(UA)

  6. The Bok • Organization: Steward Observatory. • Location: Kitt Peak, Arizona, USA • Wavelength: optical, infrared • Diameter: 2.3m (90 inches)

  7. Location―Kitt Peak • Altitude: 6,900 ft (2071 m) • Latitude: +31° 57' 46.5“ • Longitude: 111°36' 01.6"W • Time Zone: +7 hours

  8. The Telescope The Bok 90 inch (2.3 meter) Reflector Telescope

  9. Flat fielding

  10. 10-second Flat

  11. Telescope Control Room

  12. Michael was working in the Lab…

  13. CCD Lab

  14. CCD configuration NAOC has spent $365,000 for the new CCD Mosaic according to the contract.

  15. The 3×3 Pointings one field of view= 1.028 deg^2 Uncovered squre= 0.001 deg^2 0.141% 1 time cover= 0.116 deg^2 11.288% 2 time cover= 0.911 deg^2 88.571%

  16. The Telescope Moving Speed in RA N1= 28 N2= 30 V_RA(+)= 6.50402451 SEC/DEG V_RA(-)= 7.75749779 SEC/DEG

  17. The Telescope Moving Speed in DEC N1= 30 N2= 30 V_DEC(+)= 12.63 SEC/DEG V_DEC(-)= 12.56 SEC/DEG

  18. The weather statistics of Bok

  19. The seeing distributions of Bok

  20. Total Observation Time • If we have 55 nights, then Exp Time of Each Field=(55 nights ×10 hours / nights ×65% useful night )/ 3700deg^2=5.80 min/deg^2 • If we have 80 nights, then Exp Time of Each Field=(80 nights ×10 hours / nights ×65% useful night )/3700deg^2=8.43 min/deg^2

  21. Bok 300 s Bok 300s exposure is ~1.5 mag deeper than SDSS SDSS 53 s

  22. Bok 300s e ~1.5 mag deeper than SDSS Limiting Mag (S/N=10)= 21.91 — Limiting Mag (S/N=10)= 20.48 = 1.43 magLimiting Mag (S/N= 5)= 22.68 — Limiting Mag (S/N= 5)= 21.09 = 1.59 mag

  23. Bok 300s e ~1.5 mag deeper than SDSS Limiting Mag (S/N=10)= 21.91 — Limiting Mag (S/N=10)= 20.39 = 1.52 magLimiting Mag (S/N= 5)= 22.68 — Limiting Mag (S/N= 5)= 21.24 = 1.44 mag

  24. The u-band Sky MAP

  25. The u-band Sky Survey and SDSS Dr7

  26. Survey Priority

  27. SDSSIII Fields Use SDSS data to do the Flux Calibration for our uband survey?

  28. Extinction Distribution

  29. The BATC Fields

  30. Data Reduction • cp edo_a1413.0053.fits edo.fit ! for simple • coord8 edo ! turn map, coordination, produce uedo.fit • badlineuedo ! bad line corrected • -------------------------------------------------------------------------------- • sex uedo.fit ! produce test.cat 1538 • chbercoouedo ! produce uedo.coo, delete edge 10 line 1271 • pip231 uedo 1245 • coo2als uedo ! putcoouedo coo2als.dat, will delete it 4 • checkmisuedo ! produce miss.dat, all missed are cosmos 26 • getcosmosuedo ! from uedo.als <-10, produce cosmos.dat, 107 • ! reorder uedo.coo, count in coo2als.dat 1164 • pip231 uedo 1163 • coo2als uedo ! 0 • checkmisuedo ! 108 • getcosmosuedo ! cosmos.dat 109 • ! uedo.coo 1162 • pip231 uedo ! 1162 • -------------------------------------------------------------------------------- • putcoouedo cosmos.dat ! produce uedocosmos.fit • putcoouedo uedo.als ! produce uedoals.fit • ds9 uedocosmos.fit • ds9 uedoals.fit uedo.fits • dispsfberuedo 5 • -------------------------------------------------------------------------------- • extrcatuedo ! extract ..from test.cat & uedo.als, prod uedo.ext • lastcatuedo [1.0] ! [1.0] is sharpness Catalogues

  31. Photometry Comparisons

  32. Color Term

  33. Thanks!Welcome to visit us: http://batc.bao.ac.cn/Uband/

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