Possible Quasi-Periodic modulation in the z = 1.1 $\gamma$-ray blazar PKS 0426-380

Pengfei Zhang, Dahai Yan, Nenghui Liao +3

We search for $\gamma$-ray and optical periodic modulations in a distant flat spectrum radio quasar (FSRQ) PKS 0426-380 (the redshift $z=1.1$). Using two techniques (i.e., the maximum l…