Lensed quasars in UMa and Leo

Dear friends,

I sat down the other night to pursue two well-known examples of gravitational lensing in Ursa Major and Leo, respectively.

For those interested, I kindly direct you to the following:

(1) www.perseus.gr/Astro-DSO-QSO-SBS0909+532.htm (mag 17.24)
(2) www.perseus.gr/Astro-DSO-QSO-FBQ0951+2635.htm (mag 17.31)

The second example above is especially significant since the optical
time delay between the two components is used for the study of the
Hubble parameter H(0).