An X-ray and Infrared Survey of the Lynds 1228 Cloud Core
  The nearby Lynds 1228 (L1228) dark cloud at a distance of ~200 pc is known to
harbor several young stars including the driving sources of the giant HH 199
and HH 200 Herbig-Haro outflows. L1228 has been previously studied at optical,
infrared, and radio wavelengths but not in X-rays. We present results of a
sensitive 37 ks Chandra ACIS-I X-ray observation of the L1228 core region.
Chandra detected 60 X-ray sources, most of which are faint (<40 counts) and
non-variable. Infrared counterparts were identified for 53 of the 60 X-ray
sources using archival data from 2MASS, Spitzer, and WISE. Object classes were
assigned using mid-IR colors for those objects with complete photometry, most
of which were found to have colors consistent with extragalactic background
sources. Seven young stellar object (YSO) candidates were identified including
the class I protostar HH 200-IRS which was detected as a faint hard X-ray
source. No X-ray emission was detected from the luminous protostar HH 199-IRS.
We summarize the X-ray and infrared properties of the detected sources and
provide IR spectral energy distribution modeling of high-interest objects
including the protostars driving the HH outflows.
