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We report on Chandra, NuSTAR, and MDM observations of two INTEGRAL sources,namely IGR J17528-2022 and IGR J20063+3641. IGR J17528-2022 is an unidentifiedINTEGRAL source, while IGR J20063+3641 was recently identified as a magneticcataclysmic variable (mCV) by Halpern et al. (2018). The Chandra observation ofIGR J17528-2022 has allowed us to locate the optical counterpart to the sourceand to obtain its optical spectrum, which shows a strong H$\alpha$ emissionline. The optical spectrum and flickering observed in the optical time-seriesphotometry in combination with the X-ray spectrum, which is well fit by anabsorbed partially covered thermal bremsstrahlung model, suggests that thissource is a strong mCV candidate. The X-ray observations of IGR J20063+3641reveal a clear modulation with a period of 172.46$\pm0.01$ s, which weattribute to the white dwarf spin period. Additional MDM spectroscopy of thesource has also allowed for a clear determination of the orbital period at0.731$\pm0.015$ d. The X-ray spectrum of this source is also well fit by anabsorbed partially covered thermal bremsstrahlung model. The X-ray spectrum,spin periodicity, and orbital periodicity allow this source to be furtherclassified as an intermediate polar.

Chandra, NuSTAR, and Optical Observations of the Cataclysmic Variables IGR J17528-2022 and IGR J20063+3641