BICEP Optical Pointing Telescope

Required pointing accuracy: ~ 10 arcsec (< 1 % of beam size)

10 dynamic pointing model parameters: flexure [°/cos(el), °/sin(el)], tilt [mag,az], tilt_el, enc_zero [az,el,th], collimation error [mag,dir]

=> Must see >20 stars (magnitude 2.8 in daylight - Antarctic summer)

[2006/4/17] Manual star pointing

[2006/1/15-19] Pointed @ ~26 stars down to magnitude 2.89 (except DelCen, too low).

x: Left(-) <=> Right(+)

y: Front(-) <=> Back(+)

1.5 arcmin / turn (CCW=up)

Reference

Astrovid StellaCam EX Setting description, Pinouts EXview HAD CCD ICX248ALL (768 x 494 pixels, 7.40mm x 5.95mm) 0.4° x 0.3° FoV Pixel: 8.4μm x 9.8μm (1.9" H x 2.2" V)	2-axis Stage Controller SHOT-102	Flat (λ/10) Circular Mirror, 2", Protected Gold Fused Silica (0.55x10^-6/K) Milbond Adhesive to Invar (~1x10^-6/K)	Window 6.5mm thick, D=95mm Borosilicate (3x10^-6/K) Window Cell dwg (SS)
Is photometric 1.25" filter (IR72) 1.25" Diameter Eyepiece Extension Tubes Flocked light trap	SGSP20-20 Linear Motor Stage (20.920 mm) 1/(901mm) = 1/(921mm) + 1/(41.5m)	45° Elliptical Flat Mirror, Protected Gold 3"x4.243": λ/D = 2.2" Pyrex (3.2x10^-6/K)	Lens (crown/flint glasses) D = 100 mm f = 901 mm 720-950 nm 1.22λ/D = 2.3" Lens cell Titanium (~9x10^-6/K)