Table 7: NIR/X-ray flare flux densities. The peak flux densities of the flares detected in the individual wavelength bands are given. The spectral index is calculated assuming band centers of 2.2 $\mu $m and 1.6 $\mu $m in the near-infrared and 4 keV in the X-ray domain. The X-ray flares $\phi $2, $\phi $3 and $\phi $4 have been detected simultaneously in the NIR. For flare $\phi $1 only an upper limit in the H-band is available. For flare V no X-ray data exist. See comments on the candidate X-ray flare events $\phi $1, $\phi $2, and $\phi $4 in the text and in in Table 4.
X-ray NIR X-ray flux NIR flux NIR spectral
flare flare density density band index
ID ID (nJy) (mJy)   $\alpha_{\rm NIR/X-ray}$
$\phi $1   22$\;\pm\;$27 2.6$\;\pm\;$0.5 H -1.34$\;\pm\;$0.2
$\phi $2 I 31$\;\pm\;$27 $\ge$5.7 K -1.35$\;\pm\;$0.2
  II <20 $\sim $3.0 K <-1.34
$\phi $3 III 223$\;\pm\;$27 6$\;\pm\;$1.5 K -1.12$\;\pm\;$0.05
$\phi $4 IV 37$\;\pm\;$27 5$\;\pm\;$1.5 K -1.35$\;\pm\;$0.2
  V - 4$\;\pm\;$1.0 K -


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