Table 2: Details of the observations.

Star		 Telescope Band and exposure V/B Imagea Surface Brightness Notes
    (min)   (V-mag arcsec-2 )  

IRC+10011		 VLT  8.00 m U (4), B (2), V (2) st + env 25.7 (at 5 $^{\prime \prime }$) 1
YY Tri OHP 1.20 m B (240), V (120) $\ldots$. <25.1  
IK Tau OHP 1.20 m U (90), B(150) st <24.9 (at 10 $^{\prime \prime }$) 2
IRC+70066 OHP 1.20 m U (480), B (420), V (330) st <25.8 (at 10 $^{\prime \prime }$)  
AFGL 5254 VLT  8.00 m U (4), B (2), V (2) st <25.4 (at 5 $^{\prime \prime }$)  
CIT 6 OHP 1.20 m U (102), B (120) st <24.9 (at 10 $^{\prime \prime }$) 2
AFGL 2155 OHP 1.20 m V (300) env 25.3  
OH 348.2-19.7 VLT  8.00 m U (8), B (2), V (2) env 24.9 (at 5 $^{\prime \prime }$) 1, 3
AFGL 2514 ESO  1.54 m V (120) env 23.6 1
AFGL 3068 OHP 1.20 m B (60), V (60) env 23.9 1
AFGL 3099 OHP 1.20 m V (240) env 26.0  
AFGL 3116 OHP 1.20 m B (150), V (60) st + env 25.8 2, 4
a Detections in the V and B images: st = star, env = envelope. The star YY Tri is seen only in the I-band.
Notes: (1) See Table 3 for HST data. (2) Surface brightness from B image, assuming B-V = 0.5. (3) Star near center is field star. (4) Envelope seen only in B image.

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