Table 2: Main results from the observations.
    Emission lines    
Source z Id. $\lambda _{\rm obs}$ Flux EW (rest) $N_{\rm H}$ $L_{2-10~\rm keV}$
      ($\mu$m) 10-16 erg cm-2 s-1 Å (1022 cm-2) (1044 erg s-1)
Abell2690#029 2.0875 H$\alpha $(broad) 2.0266 $\pm$ 0.0015 20 $\pm$ 4 260 $\pm$ 50 2.2 +2.7-1.7 9.7
    [OIII]5007 1.5457 $\pm$ 0.0008 1.2 $\pm$ 0.2 37 $\pm$ 7    
    H$\beta$(broad) - <1 -    
BPM16274#069 1.3553 [OIII]5007 $1.1790\pm0.0002$ $4.6\pm0.5$a $43\pm5$ 2.6 +1.5-1.0 3.9
    [OIII]4960 $1.1680\pm0.0005$ $1.7\pm0.5$a $13\pm4$    
    H$\beta$(narrow) $1.1446\pm0.0005$ $2.1\pm0.6$a $21\pm6$    
    H$\alpha $(narrow) $1.5463\pm0.0005$ $2.3\pm0.7$a $10\pm3$    
    [NII]6583 $1.5502\pm0.0005$ $2.8\pm0.7$a $12\pm3$    
Abell2690#075 2.13b H$\alpha $(?)b $2.0574\pm0.0020$b $0.81\pm0.15$b $30\pm6$ 36 +47-22b 15.0b
a Highly uncertain flux calibration. b Redshift and other derived quantities based
  on the tentative identification of the feature at 2.0574 $\mu$m with H$\alpha $.

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