"nn" == nakisa nooraee writes:

nn does anybody know about the effect of redshift on gravititional
nn lensing ?

These are effectively independent processes. A redshifted object can
be gravitationally lensed.

nn and is gravititional lensing is searched on galaxies which move
nn toward us ,such as M31 ,in other word i want know about the effect
nn of blue shift on lensing

Certainly there have been searches for gravitational lensing toward
M31, and the teams conducting the search (the AGAPE team) have
detected events.

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