The Large Sky Area Multi-Object Fibre Spectroscopic Telescope (LAMOST)
  Quasar Survey: Quasar Properties from Data Release Two and Three
  This is the second installment for the Large Sky Area Multi-Object Fibre
Spectroscopic Telescope (LAMOST) Quasar Survey, which includes quasars observed
from September 2013 to June 2015. There are 9024 confirmed quasars in DR2 and
10911 in DR3. After cross-match with the SDSS quasar catalogs and NED, 12126
quasars are discovered independently. Among them 2225 quasars were released by
SDSS DR12 QSO catalogue in 2014 after we finalised the survey candidates. 1801
sources were identified by SDSS DR14 as QSOs. The remaining 8100 quasars are
considered as newly founded, and among them 6887 quasars can be given reliable
emission line measurements and the estimated black hole masses. Quasars found
in LAMOST are mostly located at low-to-moderate redshifts, with a mean value of
1.5. The highest redshift observed in DR2 and DR3 is 5. We applied emission
line measurements to H$\alpha$, H$\beta$, Mg{\sc ii} and C{\sc iv}. We deduced
the monochromatic continuum luminosities using photometry data, and estimated
the virial black hole masses for the newly discovered quasars. Results are
compiled into a quasar catalog, which will be available online.
