ZTF J1901+5309: a 40.6-min orbital period eclipsing double white dwarf system
ZTF J1901+5309: a 40.6-min orbital period eclipsing double white dwarf system
The Zwicky Transient Facility has begun to discover binary systems with orbital periods that are less than 1\,hr. Combined with dedicated follow-up systems, which allow for high-cadence photometry of these sources, systematic confirmation and characterization of these sources are now possible. Here, we report the discovery of ZTF J190125.42+530929.5, a …