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Table 2.

Equivalent widths and column densities for the hot WHIM.

Instr. O VII Heα
O VIII Lyα
EWa logN(ion)a EWa logN(ion)a
cm−2 cm−2
A1 (z = 0.00878; λO VII = 21.79 Å; λO VIII = 19.14 Å)
RGS1 2.2 ± 1.8 14.9 < 2.1 < 15.2
HRC < 2.6 < 15.0 < 1.2 < 15.0
A2 (z = 0.01892; λO VII = 22.01 Å; λO VIII = 19.33 Å)
RGS1 < 1.2 < 14.6 < 2.0 < 15.2
HRC < 1.0 < 14.6 < 2.4 < 15.3
A3 (z = 0.05425; λO VII = 22.77 Å; λO VIII = 20.00 Å)
RGS1 < 4.0 < 15.2 < 1.0 < 14.9
HRC < 4.6 < 15.2 < 2.3 < 15.2
A4 (z = 0.05683; λO VII = 22.83 Å; λO VIII = 20.05xs Å)
RGS1 < 0.8 < 14.5 < 1.4 < 15.0
HRC < 5.8 < 15.4 < 2.3 < 15.3
A5 (z = 0.08062; λO VII = 23.34 Å; λO VIII = 20.50 Å)
RGS1 b b < 1.9 < 15.2
HRC b b < 2.6 < 15.3
A6 (z = 0.10569; λO VII = 23.89 Å; λO VIII = 20.97 Å)
RGS1 < 1.8 < 14.8 < 1.4 < 15.0
HRC < 1.6 < 14.8 < 2.6 < 15.3

Notes.

(a)

The constrains or the upper limits at 1σ confidence level for the equivalent width (EW) and the ion column densities (logN(ion)), where the uncertainties include both the statistical uncertainty and the systematic 2% uncertainty of the flux.

(b)

The wavelengths coincide with the instrumental feature.

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