NICER observation list: Target ID 260401

WZ Sge is the prototype of a subclass of dwarf novae with extremely long recurrence periods. It is also a unique and puzzling source exhibiting 27.87 s and 28.97 s periods in the optical data. In the X-rays, the former was seen in the ASCA data while the latter was seen in the XMM-Newton data. The 27.87 s period has often been interpreted as the spin period of a magnetic white dwarf, but then we do not have a satisfactory explanation of the 28.97 s period. If it is a magnetic system, that could lengthen the recurrence period between successive dwarf nova outbursts, but there are other long recurrence period systems that are almost certainly nonmagnetic. Here we propose a NICER observation to investigate the X-ray periods of WZ Sge, and to investigate their possible origins.