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We present and study cosmic voids identified using the watershed void finderVIDE in the Sloan Digital Sky Survey Data Release 9, compare these voids toones identified in mock catalogs, and assess the impact of the survey mask onvoid statistics such as number functions, ellipticity distributions, and radialdensity profiles. The nearly 1,000 identified voids span three nearlyvolume-limited samples from redshift z = 0.43 to 0.7. For comparison we use 98of the publicly available 2LPT-based mock galaxy catalogs of Manera et al., andalso generate our own mock catalogs by applying a Halo Occupation Distributionmodel to an N-body simulation. We find that the mask reduces the number densityof voids at all scales by a factor of three and slightly skews the relativesize distributions. This engenders an increase in the mean ellipticity byroughly 30%. However, we find that radial density profiles are largely robustto the effects of the mask. We see excellent agreement between the data andboth mock catalogs, and find no tension between the observed void propertiesand the properties derived from {\Lambda}CDM simulations. We have added thevoid catalogs from both data and mock galaxy populations discussed in this workto the Public Cosmic Void Catalog at http://www.cosmicvoids.net.

Voids in the SDSS DR9: observations, simulations, and the impact of the survey mask