Table 1: Photometry of the J2341 system, given in Vega magnitudes. The errors of the NIR photometry are $\le $0.1 mag. (2) Default 2MASS PSF photometry includes both objects. The R-mag is taken from USNO-B. (3) 2MASS 4 $^{\prime \prime }$aperture photometry. (4) ISPI aperture photometry, R-mag taken from the VLT acquisition frame. (5) Peak flux ratio of quasar-to-companion from nuclear (1 $^{\prime \prime }$) Gaussian fitting. (6) Fraction of total flux contained in nuclear Gaussian fits (quasar + companion); the complementary flux is due to extended emission.
Filter 2MASS 2MASS ISPI QSO/comp nuclear/total
(1) (2) (3) (4) (5) (6)
R 17.52 - 18.02 3.0 0.34
J 16.505 16.065 16.01 3.1 0.35
H 15.502 15.234 15.21 3.3 0.42
$K_{\rm s}$ 14.555 14.577 14.49 5.5 0.44

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