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July 21, 2010 KIAA, PKU NAOC and Steward Observatory of UA The South Galactic Cap U-band Sky Survey Zhou FAN (NAOC)

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Presentation on theme: "July 21, 2010 KIAA, PKU NAOC and Steward Observatory of UA The South Galactic Cap U-band Sky Survey Zhou FAN (NAOC)"— Presentation transcript:

1 July 21, 2010 KIAA, PKU NAOC and Steward Observatory of UA The South Galactic Cap U-band Sky Survey Zhou FAN (NAOC)

2 Scientific Goals 1.Supplying the input catalogue for LAMOST (Guo Shoujing); 2.Classifications of the stars, galaxies, AGN and quasars in the south Galactic cap region with the color-color diagram; 3.Detecting the red shift z<3 quasar candidates combining the photometry in other bands; 4.Improving the accuracy of measuring the red shift of the galaxies with PhotoZ combining the photometry in other bands; 5.Searching for the starburst galaxies candidates; 6.Estimating the metallicity of the stellar populations in the galaxies; 7.Identifying 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; 8.For the flux calibration of the LAMOST spectra.

3 Color-color Diagram 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 Age Estimation  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) Edward Olszewski(UA) Xiaohui Fan(UA) Yipeng Jing(SHAO) Zhaoji Jiang(NAOC/PKU) Xuebin Wu(PKU) Weipeng Lin(SHAO) Shiyin Shen(SHAO) Zhou Fan(NAOC) Zhenyu Wu(NAOC) …….

6 The 90-inch Bok Telescope 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 Bok 90 inch (2.3 meter) Reflector Telescope The Telescope

9 Flat fielding

10 Telescope Control Room

11 New CCD Mosaic: ITL of UA

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

13 The 3×3 Pointing one field of view= deg^2 Uncovered squre= deg^ % 1 time cover= deg^ % 2 time cover= deg^ %

14 The Telescope Moving Speed in RA N1= 28 N2= 30 V_RA(+)= SEC/DEG V_RA(-)= SEC/DEG

15 The Telescope Moving Speed in DEC N1= 30 N2= 30 V_DEC(+)= SEC/DEG V_DEC(-)= SEC/DEG

16 The weather statistics of Bok

17 The seeing distributions of Bok

18 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 Total Observation Time

19 Bok 300 s SDSS 53 s Comparison of Bok 300s exposure and SDSS in u band

20 Bok 300s: 1.5 mag deeper than SDSS Limiting Mag (S/N=10)= — Limiting Mag (S/N=10)= = 1.43 mag Limiting Mag (S/N= 5)= — Limiting Mag (S/N= 5)= = 1.59 mag

21 Bok 300s: 1.5 mag deeper than SDSS Limiting Mag (S/N=10)= — Limiting Mag (S/N=10)= = 1.52 mag Limiting Mag (S/N= 5)= — Limiting Mag (S/N= 5)= = 1.44 mag

22 The u-band Sky MAP Sep-Dec of

23 Survey Priority 6 dark nights / month from Sep to Dec

24 The Pan-Andromeda Archaeological Survey (PAndAS) PAndAS is an astronomical survey using the Canada-France- Hawaii Telescope, which will obtain g and i imaging of over 300 sq. degrees of the M31/M33 sub-group.Canada-France- Hawaii Telescope PI: Alan McConnachie

25 M31-M33 galactic interaction (gray nights)

26 Galactic Anti-center Survey (gray nights) Xuyi Schmidt telescope PI: Xiaowei Liu Bands: g r i

27 Flux calibration with SDSSIII

28 Color Term Examination

29 Flux Calibration: BATC 60/90 cm Schmidt Telescope >12e <4e RON <5%15 μm/pixel 1.7"/pixel 58’×58’ 2K × 2KOld Thick 92.2%12 μm/pixel 1.3"/pixel 93’×93’ 4K × 4KNew E2V BQE(~400nm)‏Pixel ScaleFOVSize

30 cp edo_a fits edo.fit ! for simple coord8 edo ! turn map, coordination, produce uedo.fit badline uedo ! bad line corrected sex uedo.fit ! produce test.cat 1538 chbercoo uedo ! produce uedo.coo, delete edge 10 line 1271 pip231 uedo 1245 coo2als uedo ! putcoo uedo coo2als.dat, will delete it 4 checkmis uedo ! produce miss.dat, all missed are cosmos 26 getcosmos uedo ! from uedo.als <-10, produce cosmos.dat, 107 ! reorder uedo.coo, count in coo2als.dat 1164 pip231 uedo 1163 coo2als uedo ! 0 checkmis uedo ! 108 getcosmos uedo ! cosmos.dat 109 ! uedo.coo 1162 pip231 uedo ! putcoo uedo cosmos.dat ! produce uedocosmos.fit putcoo uedo uedo.als ! produce uedoals.fit ds9 uedocosmos.fit ds9 uedoals.fit uedo.fits dispsfber uedo extrcat uedo ! extract..from test.cat & uedo.als, prod uedo.ext lastcat uedo [1.0] ! [1.0] is sharpness Data Reduction Catalogues

31 Photometry Comparisons

32 Thanks! Welcome to visit us:


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