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Table 2.

Optical counterparts of XMMU J045315.1−693242, XMMU J045736.9−692727, and RX J0524.2−6620.

Source V (a) Q (a,b) 2MASS J H Ks RA Dec D (d)
name (J2000) (c)
(mag) (mag) (mag) (mag) (mag) (h m s) (° ′ ″) (″)
J0453 15.49 −0.85 04531503 − 6932416 15.51 15.19 15.27 04 53 15.05 −69 32 41.5 0.97
J0457 14.22 −1.33 04573695 − 6927275 13.50 13.38 13.18 04 57 36.95 −69 27 27.5 0.39
J0524 14.87 −0.94 05241180 − 6620512 14.70 14.69 14.59 05 24 11.81 −66 20 51.1 0.37

Notes.

(a)

Magnitudes and colours from Zaritsky et al. (2004).

(b)

Reddening-free parameter Q = U − B − 0.72(B − V). For the distribution of the Q parameter of BeXRBs in the SMC see Haberl & Sturm (2016).

(c)

Position of the optical counterpart from Gaia EDR3 (see Gaia Collaboration 2021, 2016).

(d)

Angular distance between XMM-Newton and Gaia position.

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