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Based on time-series observations collected from Zwicky Transient Facility(ZTF), we derived period-luminosity-metallicity (PLZ) andperiod-Wesenheit-metallicity (PWZ) relations for RR Lyrae located in globularclusters. We have applied various selection criteria to exclude RR Lyrae withproblematic or spurious light curves. These selection criteria utilizedinformation on the number of data points per light curve, amplitudes, colors,and residuals on the period-luminosity and/or period-Wesenheit relations. Dueto blending, a number of RR Lyrae in globular clusters were found to beanomalously bright and have small amplitudes of their ZTF light curves. We usedour final sample of ~750 RR Lyrae in 46 globular clusters covering a widemetallicity range (-2.36 < [Fe/H] < -0.54 dex) to derive PLZ and PWZ relationsin gri bands. In addition, we have also derived the period-color-metallicity(PCZ) and for the first time, the PQZ relations where the Q-index isextinction-free by construction. We have compared our various relations toempirical and theoretical relations available in literature, and found a goodagreement with most studies. Finally, we applied our derived PLZ relation to adwarf galaxy, Crater II, and found its true distance modulus should be largerthan the most recent determination.

Zwicky Transient Facility and Globular Clusters: The RR Lyrae gri-Band Period-Luminosity-Metallicity and Period-Wesenheit-Metallicity Relations