Table 2: Integrated strength of the PAH emission features.
Object 3.3 6.2 "7.7'' 8.6 11.2(3) 12.7 16.4 Ref.
  $[\mu \rm m]$ $[\mu \rm m]$ $[\mu \rm m]$ $[\mu \rm m]$ $[\mu \rm m]$ $[\mu \rm m]$ $[\mu \rm m]$  
AB Aur <1a 4.4(0.3) 4.2(0.6) 2(0.2) 2(0.6) - - (1)
HD 100546 2.5(0.5) 14.3(0.4) 19.2(0.8) 4.6(0.5) -b - - (1)
HD 142527 1(0.6) <1.5 - - <0.5 - - (1)
HD 179218 1.7(0.2) 8.1(0.4) 14.4(0.6) 1.6(0.4) - - - (1)
HD 100453 1.3(0.2) 2.6(0.5) - - 1.2(0.3) - - (1)
HD 135344 <0.5 <1.5 ? - <1 - - (2)
HD 139614 <0.5 <1.5 - - <0.5 - - (2)
HD 169142 1(0.2) 2.8(0.3) - - 2.3(0.5) - - (1)
HD 104237 <0.5 <1.5 - - - - - (2)
HD 142666 0.3(0.2) 2.6(0.3) - - - - - (1)
HD 144432 <0.5 <1.5 - - - - - (2)
HD 150193 <0.08a <1.5 - - - - - (2)
HD 163296 <0.2a <1.5 - - - - - (2)
HD 97048 1.3(0.3) 6.9(0.8) 11.8(1.3) 2.4(0.6) 3.4(0.4) 1(0.2) - (2)
Elias 1 0.5c(0.1) 6.1(0.6) 9.4(0.1) 2.3(0.1) -d - - (2)
Lk H$\alpha $ 25 0.076(0.006)             (3)
HK Ori 0.087(0.045)             (3)
HD 245185 0.035(0.018)             (3)
Lk H$\alpha $ 198 <0.15             (3)
BD+61$^{\circ}$154 <0.09             (3)
T Ori <0.15             (3)
V380 Ori <0.1             (3)
HD 250550 <0.12             (3)
Lk H$\alpha $ 208 <0.03             (3)
VV Ser <0.05             (3)
WW Vul <0.09             (3)
BD+46$^{\circ}$3471 <0.1             (3)
Lk H$\alpha $ 233 <0.04             (3)
WL 16 0.17(0.03)       5(0.4)     (4)
Integrated fluxes (after continuum substraction) and uncertainty (in between brackets) are in units of 10-14 W/m2. For non-detections, we give for the 3.3, 6.2 and 11.3 $\mu $m feature 5$\sigma $ limits estimated from the spectrum of Meeus et al. (2001) and assuming constant feature widths taken from Li & Draine (2001a). We have not included the 11.2(3) $\mu $m band for the sources with strong silicate emission.
a From Brooke et al. (1993).
b In the spectrum of HD 100546 a 11.2(3) $\mu $m PAH feature is present but may be blended with the crystalline olivine band at 11.3 $\mu $m (Malfait et al. 1998).
c Measured in ground-based spectrum (Geballe 1997).
d Hanner et al. (1994) report the presence of an 11.2 $\mu $m feature in their UKIRT spectrum. They attribute this feature to the presence of crystalline silicate but it could also be a PAH band.
References: (1) Van Kerckhoven et al. (2002); (2) Meeus et al. (2001); (3) Brooke et al. (1993); (4) From the spectrum of Tokunaga et al. (1991) and Hanner et al. (1992) for the 3.3 and 11.3 $\mu $m feature, respectively.

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