A WISE measurement of the ISW effect
  The Integrated Sachs-Wolfe effect (ISW) measures the decay of the
gravitational potential due to cosmic acceleration and is thus a direct probe
of Dark Energy. In some of the earlier studies, the amplitude of the ISW effect
was found to be in tension with the predictions of the standard $\Lambda$CDM
model. We measure the cross-power of galaxies and AGN from the WISE mission
with CMB temperature data from WMAP9 in order to provide an independent
measurement of the ISW amplitude. Cross-correlations with the recently released
Planck lensing potential maps are used to calibrate the bias and contamination
fraction of the sources, thus avoiding systematic effects that could be present
when using auto-spectra to measure bias. We find an amplitude of the
cross-power of $\mathcal{A} = 1.24\pm 0.47$ from the galaxies and $\mathcal{A}
= 0.88 \pm 0.74$ from the AGN, fully consistent with the $\Lambda$CDM
prediction of $\mathcal{A} =1$. The ISW measurement signal-to-noise ratio is
2.7 and 1.2 respectively, giving a combined significance close to $3 \sigma$.
Comparing the amplitudes of the galaxy and AGN cross-correlations, which arise
from different redshifts, we find no evidence for redshift evolution in Dark
Energy properties, consistent with a Cosmological Constant.
