CSO and CARMA Observations of L1157. I. A Deep Search for Hydroxylamine
  (NH$_2$OH)
  A deep search for the potential glycine precursor hydroxylamine (NH$_2$OH)
using the Caltech Submillimeter Observatory (CSO) at $\lambda = 1.3$ mm and the
Combined Array for Research in Millimeter-wave Astronomy (CARMA) at $\lambda =
3$ mm is presented toward the molecular outflow L1157, targeting the B1 and B2
shocked regions. We report non-detections of NH$_2$OH in both sources. We a
perform non-LTE analysis of CH$_3$OH observed in our CSO spectra to derive
kinetic temperatures and densities in the shocked regions. Using these
parameters, we derive upper limit column densities of NH$_2$OH of $\leq1.4
\times 10^{13}$~cm$^{-2}$ and $\leq1.5 \times 10^{13}$~cm$^{-2}$ toward the B1
and B2 shocks, respectively, and upper limit relative abundances of
$N_{NH_2OH}/N_{H_2} \leq1.4 \times 10^{-8}$ and $\leq1.5 \times 10^{-8}$,
respectively.
