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We present photometric and spectroscopic observations of two closequasar-quasar pairs found in the Large Bright Quasar Survey (LBQS) (Hewett etal. 1995, AJ, 109, 1498). The two components of the 2153-2056 pair ($z=1.845$,$\Delta\theta=7\farcs8$, $B=17.9$ and 21.3) have the same redshifts within therelatively large uncertainty, $\Delta v_{A-B} =-1100\pm1500 km s^{-1}$, of theobservations. The quasars are most likely spatially coincident although thepossibility that the pair is the result of gravitational lensing cannot beruled out. The two components of 1148+0055 ($z=1.879$, $B=18.5$ and $z=1.409$,$B=21.1$, $\Delta\theta=3\farcs9$) have disjoint redshifts and the pair hasattracted some attention in the context of gravitational lensing (e.g. Wampler1997, ApJ, 476, L55) following the independent discovery of the pair by Surdejand collaborators. Four close, $\Delta\theta \le10\farcs0$, quasar-quasar pairshave now been discovered in the LBQS and we discuss the probability ofidentifying pairs with disjoint redshifts and of locating spatially coincidentpairs from the systematic investigation of the well-defined quasar catalogue.Comment: Accepted for publication in the Astronomical Journal, Paper, 4  Figures + 1 Tabl

Two Close Separation Quasar-Quasar Pairs in the Large Bright Quasar Survey