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Table 1

Measured magnitudes and colours of the red clump peaks along the line of sight and their derived extinction and distances based on twodifferent extinction laws.

Brighter peak Fainter peak
Ks [mag] 14.07 ± 0.05 14.78 ± 0.09
(JKs) [mag] 1.52 ± 0.04 1.62 ± 0.14
E(JKs) [mag] 0.92 1.02
AK [mag] 0.44a (0.67)b 0.49a (0.74)b
D [kpc] 11.0 ± 2.4a (10.1)b 14.8 ± 3.6a (13.5)b

Notes. (a)AK = 0.484 × E(JK) (final adopted value); (b)AK = 0.725 × E(JK) (Cardelli et al. 1989)

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