https://heasarc.gsfc.nasa.gov/docs/nicer/schedule/too_individual/43141.html
Request 43141: ZTF J1838+3223
requestztf
https://collaborate.princeton.edu/en/publications/the-radio-variability-of-the-gravitational-lens-pmn-j1838-3427/
The radio variability of the gravitational lens PMN J1838-3427 - Princeton University
the radiovariabilitygravitational