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Further Evidence for the 9 s Pulsation in LS 5039 from NuSTAR and ASCA

Enoto, Teruaki; Makishima, Kazuo; Takahashi, Tadayuki +2 more

The present study aims to reinforce the evidence for the ~9 s pulsation in the gamma-ray binary LS 5039, derived from a Suzaku observation in 2007 and a NuSTAR observation in 2016. Through a reanalysis of the NuSTAR data incorporating the orbital Doppler correction, the 9.0538 s pulsation was confirmed successfully even in the 3-10 keV range, wher…