**Table 4:** Flux measurements of the pulsar optical counterparts (see Sect. 2.3 for details).
Object	Band	Seeing^a	S/N	d^b	Source^c	$k/\!\cos~(Z)^d$	$\delta_{\rm fin}d^e$	Mag^f	Flux
		pix		pix	-2.5 Log (counts/s)	mag	mag		$\mu$ Jy
PSR B0656+14	B	4.5	22	4	-1.68	0.25	1.12	25.27(7)	0.313(20)
	R	3.4	18	4	-2.50	0.07	0.89	24.65(8)	0.417(30)
	I	4.1	11	4	-1.90	0.05	0.95	24.52(13)	0.371(42)
Geminga	R	3.7	15	4	-1.63	0.14	0.84	25.53(11)	0.185(17)
	I	3.9	10	4	-1.37	0.05	0.87	25.10(14)	0.217(26)

^a FWHM of the stellar profile in the combined images. ^d Corrections for the atmospheric extinction.
^b Diameter of the optimal photometrical aperture. ^e Correction factors for the PSF.
^c Instrumental magnitudes, $m = {\rm Source} - k/\cos(Z) -\delta_{\rm fin}d$ . ^f Johnson-Cousins magnitudes.

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