Apsidal motion and TESS light curves of three southern close eccentric eclipsing binaries: GM Nor, V397 Pup, and PT Vel

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Table 5.

Apsidal motion elements of GM Nor, V397 Pup, and PT Vel.

Element	Unit	GM Nor	V397 Pup	PT Vel
T₀	BJD	41683.7157 (5)	48502.4531 (6)	48293.4745 (8)
P_s	days	1.88457721 (12)	3.0044198 (7)	1.8020229 (6)
P_a	days	1.88469921 (12)	3.0044936 (8)	1.8020782 (6)
e	–	0.0478 (12)	0.285 (3)	0.1195 (2)
${\dot{ω}}_{obs}$ $\dot{\omega}_{\mathrm{obs}}$	deg ${cycle}^{- 1}$ $\:\rm{cycle^{-1}}$	0.0233 (14)	0.0088 (4)	0.01105 (8)
${\dot{ω}}_{obs}$ $\dot{\omega}_{\mathrm{obs}}$	deg ${yr}^{- 1}$ $\:\rm{yr^{-1}}$	4.52 (27)	1.07 (7)	2.24 (13)
ω₀	deg	178.8 (1.1)	19.1 (1.0)	257.5 (0.8)
U	years	79.7 (4.8)	335 (25)	160.7 (13)

Σw(O − C)²	day²	4.1 × 10⁻³	9.23 × 10⁻³	1.93 × 10⁻³

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