**Table 1:** Properties of the three Herbig Ae stars observed with the CAMIRAS mid-InfraRed camera. First two columns: coordinates of the objects (right ascension and declination); third column: their spectral type; fourth column: their distance, as deduced from Hipparcos data; fifth column: flux in the IRAS 25 $\mu$ m band; sixth column: flux at 20 $\mu$ m obtained in this paper; seventh column: age of the objects in Myr.
Object	RA (2000)	Dec (2000)	Spectral type	Distance (pc)	F₂₅ (Jy)	F₂₀ (Jy)	Age (Myr)	References
HD 135344	15 15 48.4	-37 09 16	F4V	140 _-42⁺⁴²	6.7	5 $\pm$ 1	$8\pm4$	1, 2, 4, 8, 10, 11
HD 163296	17 56 21.4	-1 57 20	A3Ve	122 _-16⁺¹³	21	18 $\pm$ 4	$7\pm5$	3, 4, 5, 11, 12
CQ Tau	05 35 58.4	+24 44 54	A1-F5IVe	100 _-17⁺²⁵	20.6	$23 \pm 3$	10	6, 7, 9, 12

References: (1) Coulson et al. (1998); (2) Dominik et al. (2003); (3) Jayawardhana et al. (2001); (4) Meeus et al. (2001); (5) Mannings & Sargent (1997); (6) Mannings & Sargent (2000); (7) Natta et al. (2001); (8) Sylvester et al. (1996); (9) Testi et al. (2001); (10) Thi et al. (2001); (11) van Boekel et al. (2005); (12) van den Ancker et al. (1998).

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