  We introduce the LEnSed laeS in the Eboss suRvey (LESSER) project, which aims
to search for lensed Lyman-$\alpha$ Emitters (LAEs) in the Extended Baryon
Oscillation Spectroscopic Survey (eBOSS). The final catalog contains 361
candidate lensing systems. The lens galaxies are luminous red galaxies (LRGs)
at redshift $0.4 < z < 0.8$, and the source galaxies are LAEs at redshift $2 <
z < 3$. The spectral resolution of eBOSS ($\sim$2000) allows us to further
identify the fine structures of Lyman-$\alpha$ ($\rm Ly\alpha$) emissions.
Among our lensed LAE candidates, 281 systems present single-peaked line
profiles while 80 systems show double-peaked features. Future
spectroscopic/imaging follow-up observations of the catalog may shed light on
the origin of diverse $\rm Ly\alpha$ line morphology, and provide promising
labs for studying low mass dark matter haloes/subhaloes.
