Table 3:

The results.

Star name	Fit as dust disc			Limit on extension			(a)
	Temp, K	AU		AU	m(b) ;; 10-5
Photometric confirmation of excess
HD 3003	265	4.00	0.086	< 6.5+2.1-0.9	0.55	20.1	0.053
HD 80950	180	13.6	0.17	< 24.5+7.5-3.5	0.01	9.62	0.544
Telc		3.90	0.081	<6		15.7	0.210
		21-26	0.44-0.54	-		13.9	12.52
Constraints on radial extent of disc
HD 71155	500	1.98	0.052	< 8.2+5.7-0.5	-	8.95	0.0034
	90	61.03	1.59	-	-	1.92	7.60
Gemd	420	2.16	0.07	< 6.1+0.2-0.3	0.012	5.64	0.002
HD 23281	210	5.36	0.12	< 9.5+4.2-0.7	0.68	3.82	0.024
HD 75416	250	11.1	0.11	< 55.2+1.5-1.5	-	7.98	2.44
HD 141795	250	4.64	0.22	< 6.1+0.3-0.4	0.73	4.43	0.008
Unconstrained by these observations
HD 31295	80	52.6	1.4	-	-	5.85	9.216
HD 38206	90	48.4	0.70	-	-	15.1	84.96

Notes. Note that the objects with no extension limits have too low a fractional excess for the extension to have been detected in the images regardless of size. Estimates of radius are based on blackbody fits and could be up to three times larger if the grains responsible for the emission are small. Limits on extension shown here are for a narrow face-on discs. Errors on this limit arise from 3 photometric errors and errors on the determination of the photospheric emission at the observed wavelength. These sources are combined to give 3 uncertainties on , which in turn give a range of radii at which a disc could have been detected as extended emission. Horizontal lines indicate division into photometrically confirmed debris discs, and sources for which our results provide constraints on the discs (Sects. 4.1 and 4.2 respectively). ^(a) See Sect. 6 for details of this limit; ^(b) the minimum grain diameter (for the composition assumed in Sect. 3.3) such that grains at the maximum radius given by the extension testing limits do not exceed the temperature of the blackbody fit to the excess emission (where limits on the disc radius are large compared to the blackbody radius no limit can be placed on the minimum grain size, as even the smallest grains cannot reach the fitted temperature at the extension limit radius); ^(c) These disc locations are taken from Smith et al. (2009a); ^(d) binary detected.