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Table 1.

L′-band flux and magnitude of S2 and S65 for seven epochs over a 15-year interval from 2004.317 to 2018.307.

UT date Decimal date S2 flux (mJy) S65 flux (mJy) S2 mag S65 mag Observation ID
2004 April 25 2004.317 9.02 ± 0.30 14.56 ± 0.94 11.10 ± 0.04 10.59 ± 0.07 60.A-9026(A)
2005 May 14 2005.367 9.30 ± 0.30 15.07 ± 0.91 11.07 ± 0.04 10.55 ± 0.07 073.B-0085(D)
2006 May 29 2006.408 9.30 ± 0.30 15.07 ± 0.91 11.07 ± 0.04 10.55 ± 0.07 077.B-0552(A)
2007 April 01 2007.249 8.88 ± 0.19 14.49 ± 0.63 11.12 ± 0.02 10.59 ± 0.05 179.B-0261(A)
2008 May 26 2008.402 8.54 ± 0.15 14.19 ± 0.59 11.16 ± 0.02 10.61 ± 0.05 081.B-0648(A)
2013 May 09 2013.356 8.40 ± 0.25 14.82 ± 1.12 11.18 ± 0.03 10.57 ± 0.08 091.C-0159(A)
2018 April 22 2018.307 8.70 ± 0.10 13.62 ± 0.33 11.13 ± 0.01 10.64 ± 0.03 0101.B-0052(B)

Mean 8.88 ± 0.33 14.55 ± 0.48 11.12 ± 0.04 10.59 ± 0.03
difference (max − min) 0.90 1.45 0.11 0.09
2.52 4.53 0.22 0.51

Notes. The DIT for all cases is 0.200 s. Light-curve characteristics, namely the mean, the difference between the maximum and the minimum, and the fractional variability are also included. With the fractional variability of 2.52%, no significant difference is detected for S2 flux within the uncertainties. The reported fluxes are dereddened.

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