The Spectral Energy Distributions and Infrared Luminosities of z \approx
  2 Dust Obscured Galaxies from Herschel and Spitzer
  Dust-obscured galaxies (DOGs) are a subset of high-redshift (z \approx 2)
optically-faint ultra-luminous infrared galaxies (ULIRGs, e.g. L_{IR} > 10^{12}
Lsun). We present new far-infrared photometry, at 250, 350, and 500 um
(observed-frame), from the Herschel Space Telescope for a large sample of 113
DOGs with spectroscopically measured redshifts. Approximately 60% of the sample
are detected in the far-IR, confirming their high IR luminosities, which range
from 10^{11.6} Lsun < L_{IR} (8-1000 um) <10^{13.6} Lsun. 90% of the Herschel
detected DOGs in this sample are ULIRGs and 30% have L_{IR} > 10^{13} Lsun. The
rest-frame near-IR (1 - 3 um) SEDs of the Herschel detected DOGs are predictors
of their SEDs at longer wavelengths. DOGs with "power-law" SEDs in the
rest-frame near-IR show observed-frame 250/24 um flux density ratios similar to
the QSO-like local ULIRG, Mrk 231. DOGs with a stellar "bump" in their
rest-frame near-IR show observed-frame 250/24 um flux density ratios similar to
local star-bursting ULIRGs like NGC 6240. For the Herschel detected DOGs,
accurate estimates (within \approx 25%) of total IR luminosity can be predicted
from their rest-frame mid-IR data alone (e.g. from Spitzer observed-frame 24 um
luminosities). Herschel detected DOGs tend to have a high ratio of infrared
luminosity to rest-frame 8 um luminosity (the IR8= L_{IR}(8-1000 um)/v L_{v}(8
um) parameter of Elbaz et al. 2011). Instead of lying on the z=1-2 "infrared
main-sequence" of star forming galaxies (like typical LIRGs and ULIRGs at those
epochs) the DOGs, especially large fractions of the bump sources, tend to lie
in the starburst sequence. While, Herschel detected DOGs are similar to scaled
up versions of local ULIRGs in terms of 250/24 um flux density ratio, and IR8,
they tend to have cooler far-IR dust temperatures (20-40 K for DOGs vs. 40-50 K
for local ULIRGs). Abridged.
