[vsnet-alert 24284] ASASSN-19lb: long orbital period

Taichi Kato tkato at kusastro.kyoto-u.ac.jp
Sun May 17 08:33:18 JST 2020

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ASASSN-19lb: long orbital period

   Josch Hambsch has been reporting observations since
Mar. 19.  The data show modulations with a period
of 17.39(6) d.  Assuming that the variation reflects
ellipsoidal modulation, this period is most likely
the orbital period (longest ever recorded in dwarf novae).
The full amplitude is 0.15 mag.

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