And now I have a new problem.
The deflection is an illusion, or whether there actually runs something along the arc instead of straight?
I checked this using the Shapiro delay (for straight ray).
and in terms of distance: z(r) = -cdt
Direction of the wavefront tarns:
tan a = dz/dr, for small angles: tan a = ~ a
Thus, the rays run straight, only the wavefront rotates due to the diversity of delays.
Similarly, stellar aberration - here the wavefront turns by a fixed angle of ~ v/c, and we see the images moved forward.
Conclusion: we can not observe the stars below the edge of the Sun.