1. The KiDS survey

2. VISTA 4m telescope 0.6 sq.deg. InfraRed camera 16 2kx2k detectors 0.35” pixels VST 2.6m telescope 1 sq.deg. optical camera (OmegaCAM) 32 2kx4k detectors 0.21” pixels PARANAL OBSERVATORY 250 nights 440 nights

3. The VST (Naples obs.) VST: 2.6m f/5.5, 1.4 deg  field, active primary mirror Only one instrument: OmegaCAM = 16k x 16k CCD camera Operational in 2008

6. OmegaCAM 300 million pixels, 36 CCDs

7. Active optics / autofocus

8. 60 b=45 30 -75 b=-60 1500 sq.deg. in ugriZYJHK +2000 sq.deg. in i (+UKIDSS YJHK) SDSS + UKIDSS 2dF

9. KIDS + VIKING VST/OmegaCAM: 1 sq deg, 2.6m telescope VISTA/VISTACAM: 0.6 sqdeg, 4m telescope 1500 sq.deg. of ugri (~400n VST) + ZYJHK (~200n VISTA) Deeper in r, with good seeing VST 2m deeper than SDSS (1m shallower than CFHTLS) VISTA 1.5m deeper than UKIDSS <0.7” (40%) 0.7- 0.85” (20%) 0.85- 1.1” (20%) Dark (50%)r’g’u’ Grey (15%)--- Bright (35%)i’ filterExp time (s) Medn seeing (“) 5-  2” AB u’9001.024.8 g’9000.7525.4 r’18000.625.2 i’10800.7524.2 filterExp (s) 5-  2” AB cf. UKIDSS Z50023.1- Y40022.4+1.6 J40022.2+1.8 H30021.6+1.6 K50021.3+1.3

10. VST status New mirrors on the mountain Telescope main structure on mountain Mirror cell + actuators redesigned Commissioning 1st half 2008.

11. disassembly

12. salerno

13. livorno

14. To Paranal

15. Aug 3: On Paranal !

16. Summary 1500 sq.deg. U - K survey (9 bands) Photoz’s with few outliers Lensing from r band images (z med ~0.8) Dark energy from BAO, wk.lensing, gg lensing Main focus will be galaxy-galaxy lensing