TY - JOUR T1 - Searches for gravitational waves from known pulsars at two harmonics in the second and third LIGO-Virgo observing runs JO - The Astrophysical Journal PY - 2022/05/25 AU - Abbott R AU - Abe H AU - Acernese F AU - Ackley K AU - Adhikari N AU - Adhikari RX AU - Adkins VK AU - Adya VB AU - Affeldt C AU - Agarwal D AU - Agathos M et al ED - DO - DOI: 10.3847/1538-4357/ac6acf PB - American Astronomical Society VL - 935 IS - 1 Y2 - 2024/12/23 ER -