Table 3: Measured thermal IR irradiances of $\delta$ Vel A and B in S.I. units and in Jy. The relative uncertainty $\sigma$ on the irradiance values is listed in the last column.
Star Filter $\lambda$ ( $\mu$ m) 10^-14 W/m²/ $\mu$ m Jy $\sigma$

A PAH1 8.59 $36.93 \pm 2.68$ $9.10 \pm 0.66$ 7.3%

A PAH2 11.25 $12.38 \pm 1.22$ $5.24 \pm 0.52$ 9.9%

A NeII 12.81 $6.70 \pm 0.74$ $3.68 \pm 0.41$ 11.1%

B PAH1 8.59 $3.82 \pm 0.28$ $0.94 \pm 0.07$ 7.4%

B PAH2 11.25 $1.38 \pm 0.14$ $0.58 \pm 0.06$ 10.4%

B NeII 12.81 $0.56 \pm 0.19$ $0.31 \pm 0.11$ 34%

**Table 3:** Measured thermal IR irradiances of $\delta$ Vel A and B in S.I. units and in Jy. The relative uncertainty $\sigma$ on the irradiance values is listed in the last column.
Star	Filter	$\lambda$ ( $\mu$ m)	10^-14 W/m²/ $\mu$ m	Jy	$\sigma$
A	PAH1	8.59	$36.93 \pm 2.68$	$9.10 \pm 0.66$	7.3%
A	PAH2	11.25	$12.38 \pm 1.22$	$5.24 \pm 0.52$	9.9%
A	NeII	12.81	$6.70 \pm 0.74$	$3.68 \pm 0.41$	11.1%
B	PAH1	8.59	$3.82 \pm 0.28$	$0.94 \pm 0.07$	7.4%
B	PAH2	11.25	$1.38 \pm 0.14$	$0.58 \pm 0.06$	10.4%
B	NeII	12.81	$0.56 \pm 0.19$	$0.31 \pm 0.11$	34%

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