Astronomy & Astrophysics

Table 1: Principal lines present in the AR_MON CDS-NIS study. Wavelengths are taken from the CHIANTI database. When only one decimal place is indicated, the lines are blends of at least two transitions. Some of the principal blends are listed, as well as the number of transitions within a multiplet. The approximate temperature of maximum ionization fraction is also indicated. The lines used for the EM loci plots in the loop (L) and background (B) regions are marked with a star. Some are not selected because of low intensities or blends. Those in parentheses have been used only in a limited number of cases. The lines used for density diagnostics are marked with a "d'' (the Fe XIV 353.8/334.1 Å ratio is in the low-density limit and has not been used).
Table 2: CDS and TRACE measurements concerning the selected regions (A-E), in the loop leg (Loop), the adjacent background areas (Backgr.), and the corresponding background-subtracted values. The averaged distances along the loop (starting from the limb, where region A is) are shown in the first row. Electron densities $N_{\rm e}$ (10⁸ cm^-3) have been derived from the averaged CDS spectra and the Del Zanna et al. (2001a) calibration. Temperatures, derived from the DEM method, and total emission measures $EM = \int DEM(T) {\rm d}T$ are also shown. The bottom part shows the averaged TRACE count rates (DN s $\rm ^{-1}$ pix $\rm ^{-1}$ ) in the two bands, I (173 Å) and I (195 Å), together with their ratios.