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Table 2

Average magnitudes and amplitude of variability of the targets.

Source D B D V D R D I N B N V N R N I
(mag) (mag) (mag) (mag) (mag) (mag) (mag) (mag)

2S 0114+65 12.17 11.03 10.33 9.58 0.17 0.15 0.16 0.09 10 10 10 8
4U 0115+63 16.92 15.34 14.34 13.22 0.67 0.85 1.02 1.04 27 27 27 22
IGR J01363+6610 14.72 13.31 12.32 11.37 0.21 0.16 0.16 0.17 16 16 16 16
IGR J01583+6713 15.71 14.41 13.51 12.66 0.07 0.08 0.08 0.06 9 9 9 9
RX J0146.9+6121 12.09 11.42 11.00 10.52 0.20 0.20 0.18 0.19 26 26 26 20
RX J0240.4+6112 11.61 10.75 10.19 9.55 0.19 0.15 0.12 0.16 11 11 10 10
V 0332+53 17.16 15.42 14.26 13.04 0.28 0.28 0.30 0.35 9 9 9 7
RX J0440.9+4431 11.42 10.73 10.28 9.76 0.18 0.34 0.42 0.48 14 14 14 14
1A 0535+262 9.74 9.19 8.77 8.30 0.27 0.32 0.45 0.44 7 7 7 6
IGR J06074+2205 12.85 12.21 11.80 11.32 0.12 0.27 0.35 0.45 6 6 6 6
AX J1845.0-0433 16.24 14.06 12.71 11.42 0.19 0.11 0.08 0.06 11 11 11 9
4U 1907+09 19.41 16.35 14.40 12.53 0.20 0.18 0.10 0.08 14 14 14 10
XTE J1946+274 18.76 16.92 15.62 14.38 0.31 0.16 0.14 0.11 7 7 7 6
KS 1947+300 15.16 14.22 13.53 12.88 0.14 0.10 0.13 0.13 18 18 18 15
EXO 2030+375 22.16 19.41 17.32 15.18 0.6 0.23 0.14 0.18 6 8 8 8
GRO J2058+42 16.04 14.89 14.16 13.35 0.21 0.25 0.35 0.44 21 21 21 17
SAX J2103.5+4545 15.34 14.20 13.49 12.75 0.39 0.58 0.70 0.86 21 21 21 18
IGR J21343+4738 14.68 14.16 13.80 13.42 0.23 0.18 0.17 0.12 6 6 6 6
4U 2206+54 10.11 9.84 9.64 9.43 0.19 0.20 0.09 0.13 27 28 27 23
SAX J2239.3+6116 16.26 14.80 13.89 12.92 0.15 0.21 0.28 0.28 7 7 7 7

Notes. Dj is the difference between the largest and smallest measured magnitudes.

(†)

Affected by a large uncertainty due to the faintness of the source in this band.

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