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Table 1

Definition of the bandpasses of the I-band indices.

Index Element Central bandpass Continuum bandpasses
(μm) (μm)

Pa1 i (n = 3)  0.8461–0.8474   0.8474–0.8484, 0.8563–0.8577
Ca1 Ca ii  0.8484–0.8513   0.8474–0.8484, 0.8563–0.8577
Ca2 Ca ii  0.8522–0.8562   0.8474–0.8484, 0.8563–0.8577
Pa2 i (n = 3)  0.8577–0.8619   0.8563–0.8577, 0.8619–0.8642
Ca3 Ca ii  0.8642–0.8682   0.8619–0.8642, 0.8700–0.8725
Pa3 i (n = 3)  0.8730–0.8772   0.8700–0.8725, 0.8776–0.8792
Mg Mg i  0.8802–0.8811   0.8776–0.8792, 0.8815–0.8850
Pa4 i (n = 3)  0.8850–0.8890   0.8815–0.8850, 0.8890–0.8900
Pa5 i (n = 3)  0.9000–0.9030   0.8983–0.8998, 0.9040–0.9050
FeClTi  Fe i,Cl i,Ti i   0.9080–0.9100   0.9040–0.9050, 0.9125–0.9135
Pa6 i (n = 3)  0.9217–0.9255   0.9152–0.9165, 0.9265–0.9275

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