Table 3: X-ray properties of Class III sources in $\rho $ Oph, IC 348, R CrA, Cha I and Orion Nebula observed with Chandra, and X-ray properties of Class III sources in $\rho $ Oph observed with XMM-Newton (using the default standard solar ISM abundances in XSPEC). Multiple entries of T correspond to a multiple temperature model.
Region Sources counts ${N}{_{\rm H,X}}$ (1022 cm-2) $\chi^2_\nu$ $\chi^2$/d.o.f.a $Q_{\rm proba}$ T(keV) $L_{\rm X}$b (1030 erg s-1)
  GY12 3730 3.58 (3.36-3.81) 1.07 117/110 28% 2.2(2.0-2.4) 4.91
  DoAr21 3097 1.04 (0.95-1.13) 1.14 133/117 15% 2.8 (2.6-3.2) 31.37
  S1 2846 2.43 (2.25-2.62) 1.20 97/81 11% 1.14(0.93-1.37) 3.49
              3.55 (fixed)  
  GY135 1580 2.10 (1.88-2.22) 1.06 56.6/53 34% 2.0 (1.8-2.3) 1.34
  GY156 319 3.63 (3.00-4.36) 0.99 16.8/17 47% 1.4 (1.1-1.8) 0.76
$\rho $ Oph B162607 728 2.98 (2.66-3.31) 1.04 33/32 40% 2.1 (1.8-2.4) 1.12
  VSSG11 627 1.46 (1.22-1.75) 1.15 39/34 25% 2.0 (1.6-2.5) 0.40
  LFAM8 354 3.49 (3.00-4.15) 1.00 14/14 45% 1.7 (1.4-2.1) 0.57
  SR20 195 0.96 (0.45-1.27) 1.06 9.6/9 39% 1.6 (1.1-3.0) 2.29
  SR12 7378 0.07(0.04-0.09) 1.06 104/98 31% 0.67(0.63-0.70) 1.26
              2.1 (fixed)  
  GY289 388 3.77 (2.99-4.47) 1.01 16.1/16 44% 1.9 (1.4-2.8) 0.60
  IRS 55/GY380 1976 0.96 (0.80-1.40) 1.17 82/70 15% 0.7 (0.3-1.0) 2.49
              2.3 (1.6-3.9)  
  WL5 1322 7.21 (6.56-7.96) 1.24 47/38 15% 2.0 (1.7-2.3) 4.39
  WL19 116 7.56 (4.40-14.8) 0.26 0.8/3 85% 2.90 (fixed) 0.36
  L91 315 0.41 (0.31-0.54) 1.00 12/12 44% 2.6 (1.9-4.1) 0.83
  L6 3416 0.68 (0.59-0.81) 1.05 100/96 35% 0.8 (0.7-0.9) 13.9
              2.8 (2.5-3.2)  
IC 348 L154 136 0.39 (0.14-0.62) 1.06 9.5/9 39% 1.4 (1.0-2.5) 0.28
  H93 348 0.42 (0.33-0.65) 1.23 34/28 19% 0.9 (0.7-1.1) 0.79
  L65 443 0.41 (0.25-0.65) 1.03 14.5/14 42% 0.7 (0.6-0.9) 8.82
              2.2 (1.7-3.2)  
  L58 361 0.31 (0.19-0.54) 1.16 14/12 30% 0.8 (0.2-1.3) 0.83
              2.8 (1.7-4.4)  
  H-IfA48 524 1.13 (0.99-1.31) 1.26 24/19 20% 3.1 (2.2-5.3) 5.78
              0.6 (0.3-0.7)  
  L36 532 0.88 (0.74-1.03) 1.16 21/18 29% 0.6 (0.5-0.8) 2.63
              1.9 (1.5-3.0)  
R CrA CrA PMS1 5141 0.35 (0.29-0.39) 1.20 128/107 8% 2.7 (2.5-3.3) 6.32
              0.4 (0.3-0.7)  
  CrA PMS3 825 0.37 (0.29-0.49) 1.19 35.6/30 22% 1.5 (1.2-1.8) 0.94
              0.77(0.64-0.9)  
  CHX13a 1023 0.34 (0.26-0.51) 1.13 38/34 27% 0.7 (0.6-0.8) 0.60
              2.6 (2.0-4.7)  
Cha I CHRX 37 2439 0.86 (0.74-1.00) 1.15 88/77 18% 0.22(0.17-0.24) 16.4
              1.6 (1.5-1.9)  
  GK1 2126 0.49 (0.40-0.57) 0.93 68/74 66% 0.8 (0.7-0.9) 1.17
              2.3 (2.0-2.5)  
  CHRX 40 2954 0.63 (0.53-0.74) 1.14 92/81 18% 0.90 (0.82-0.96) 4.62
              2.6 (2.1-3.5)  
              0.23 (0.20-0.24)  
  JW45 927 0.18 (0.13-0.25) 1.02 34.7/34 44% 0.75(0.70-0.84) 10
              2.1 (1.8-2.5)  
  JW 197 239 0.19 (0.10-0.42) 1.10 8.8/8 38% 1.2 (0.9-1.4) 1.0
ONC JW260 1724 0.71 (0.66-0.89) 1.25 77/62 9% 2.1 (fixed) 170
              0.6 (0.5-0.7)  
  P1889 477 0.12 (0.05-0.19) 1.18 20/17 27% 0.61 (0.55-0.67) 1.7
  P2074 280 0.68 (0.53-0.83) 1.00 10/10 76% 0.25 (0.2-0.31) 11.9
  WL19 152 14.7(7.70-23.52) 1.20 12/10 24% 1.62(0.98-3.74) 1.52
  GY380 3190 1.04 (0.94-1.15) 1.01 209/207 43% 0.66-2.52 4.66
  GY112 504 0.41 (0.33-0.52) 1.02 59/58 43% 0.88(0.77-1.00) 0.53
$\rho $ Oph GY193 619 1.16 (1.04-1.29) 0.94 43.2/46 59% 1.25(1.15-1.35) 0.85
( XMM) GY194 262 1.15 (0.71-1.49) 1.15 19/17 30% 1.25(1.0-1.73) 0.36
  GY253 704 4.39 (3.68-5.10) 1.19 93.8/79 12% 1.67(1.42-2.06) 1.97
  GY410 228 1.57 (1.21-1.87) 1.21 35/28 20% 1.91(1.57-2.34) 0.39
  B162730 494 0.83 (0.73-1.04) 1.03 67/65 40% 1.87(1.54-2.23) 0.55
a Degrees of freedom.
b Absorption corrected luminosity $L_{\rm X}$ (1030 erg s-1) from the X-ray spectrum in the 0.5-10 keV range.

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