The soft X-ray counterpart of Hanny's Voorwerp near IC 2497
  We report the detection in Chandra ACIS archival data of an elongated soft
(<3 keV) X-ray feature tp the south of the Compton Thick Active Galactic
Nucleus (CT AGN) galaxy IC 2497, coincident with the emission feature known as
Hanny's Voorwerp (HV). The data are consistent with the spatial correspondence
between X-ray, optical emission line, and radio features detected in nearby
obscured AGNs (e.g., ESO 428-G014). The X-ray luminosity of the (0.3-3.0 keV)
soft feature is ~1.2x10^40 erg/s. We infer an [OIII]/Soft-X-ray ratio in the
range of ~200, consistent with the highest values measured in some of the
clouds of NGC 4151. Overall, given the uncertainties, Hanny's Voorwerp appears
to be a feature consistent with the ionization cone emission of nearby AGNs. We
estimate an X-ray recombination time of 2x10^7 yr, longer than the [OIII]
recombination time (~8000 yr). This suggests that extended soft X-ray
components may be a better diagnostic of overall long-term activity, while
detection of an [OIII] HV would point to a time-limited activity burst.
