TY  - JOUR
AU  - de Putter, R.
AU  - Takada, M.
PY  - 2010
DA  - 2010//
TI  - Halo-galaxy lensing: A full sky approach
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 103522
EP  - 9pp
VL  - 82
IS  - 10
PB  - Amer Physical Soc
AB  - The halo-galaxy lensing correlation function or the average tangential shear profile over sampled halos is a very powerful means of measuring the halo masses, the mass profile, and the halo-mass correlation function of very large separations in the linear regime. We reformulate the halo-galaxy lensing correlation in harmonic space. We find that, counterintuitively, errors in the conventionally used flat-sky approximation remain at a percent level even at very small angles. The errors increase at larger angles and for lensing halos at lower redshifts: the effect is at a few percent level at the baryonic acoustic oscillation scales for lensing halos of z similar to 0.2, and comparable with the effect of primordial non-Gaussianity with f(NL) similar to 10 at large separations. Our results allow one to readily estimate/correct for the full-sky effect on a high-precision measurement of the average shear profile available from upcoming wide-area lensing surveys.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1007.4809
UR  - https://doi.org/10.1103/PhysRevD.82.103522
DO  - 10.1103/PhysRevD.82.103522
LA  - English
N1  - ISI:000284307100002
ID  - dePutter+Takada2010
ER  -