Discovery of a damped Ly$\alpha$ galaxy at z $\sim$ 3 towards the quasar
  SDSS J011852+040644
  We report the detection of the host galaxy of a damped Ly$\alpha$ system
(DLA) with log N(HI) $ [\rm cm^{-2}]$ = $21.0 \pm 0.10$ at $z \approx 3.0091$
towards the background quasar SDSS J011852+040644 using the Palomar Cosmic Web
Imager (PCWI) at the Hale (P200) telescope. We detect Ly$\alpha$ emission in
the dark core of the DLA trough at a 3.3$\sigma$ confidence level, with
Ly$\alpha$ luminosity of $L_{\rm Ly\alpha}$ $\rm = (3.8 \pm 0.8) \times
10^{42}\ erg\ s^{-1}$, corresponding to a star formation rate of $\gtrsim 2\
\rm M_{\odot}\ yr^{-1}$ (considering a lower limit on Ly$\alpha$ escape
fraction $f_{esc}^{Ly{\alpha}} \sim 2\%$) as typical for Lyman break galaxies
at these redshifts. The Ly$\alpha$ emission is blueshifted with respect to the
systemic redshift derived from metal absorption lines by $281 \pm 43$ km/s. The
associated galaxy is at very small impact parameter of $\lesssim 12 \rm\ kpc$
from the background quasar, which is in line with the observed anticorrelation
between column density and impact parameter in spectroscopic searches tracing
the large-scale environments of DLA host galaxies.
