Table 3: Statistics of the number of EOs in terms of counts of expected background galaxies, in intervals of 0.5 R magnitudes. The meaning of the columns is as follows $\rightarrow~N$: Number of detected EO; $\sigma $: Error in the detected EO counts [( $\sigma _{\rm Poisson}^2$ + $\sigma _{\rm field}^2$)0.5]; $N_{\rm e}$: Number of expected background galaxies according to Metcalfe et al. (1991); $\sigma _{\rm e}$: Error in the expected number counts (Poisson + field-field variations); dN: Difference between detected and expected number counts; $\sigma _{\rm d}$: Error in dN ($\sigma $ + $\sigma _{\rm e}$); dN deg-2 mag-1: Difference between detected and expected number counts, per square degree and 0.5 magnitude; $\sigma _{\rm d}$ deg-2 mag-1: Error in dN deg-2 mag-1; $N_{\rm max}$: Maximum number of dwarf candidates (d $N + \sigma _{\rm d}$). For the last row in each field, dN is the sum of d$N_{\rm i}$ over all the Rintervals, and $\sigma _{\rm d}$ is $(\sum _{ i} \sigma _{{\rm d},i}^2)^{0.5}$.
  N $\sigma $ $N_{\rm e}$ $\sigma _{\rm e}$ d $N \pm \sigma_{\rm d}$ dN deg-2 mag-1 $\sigma _{\rm d}$ deg-2 mag-1 $N_{\rm max}$
NGC 520
$R \leq 18.0$ 4 3 7 4  -3 $\pm$ 7 -197 432 4
$18.0 < R \leq 18.5$ 5 2 4 1   1 $\pm$ 3 63 194 4
$18.5 < R \leq 19.0$ 11 4 5 1   6 $\pm$ 5 386 286 11
$19.0 < R \leq 19.5$ 10 2 11 3  -1 $\pm$ 5 -34 286 4
$19.5 < R \leq 20.0$ 15 3 23 5  -8 $\pm$ 8 -510 519 0
All  R          -5 $\pm$ 13     +8
NGC 772
$R \leq 18.0$ 12 7 6 4    6 $\pm$ 11 387 744 17
$18.0 < R \leq 18.5$ 5 1 3 1   2 $\pm$ 2 104 173 4
$18.5 < R \leq 19.0$ 17 5 4 1  13 $\pm$ 6 892 438 19
$19.0 < R \leq 19.5$ 13 2 9 2   4 $\pm$ 4 256 324 8
$19.5 < R \leq 20.0$ 18 3 21 5  -3 $\pm$ 8 -178 574 5
$20.0 < R \leq 20.5$ 19 2 32 6 -13 $\pm$ 8 -909 599 0
All  R          +9 $\pm$ 17     +26
Arp 141
$R \leq 18.0$ 6 4 7 4  -1 $\pm$ 8 -65 503 7
$18.0 < R \leq 18.5$ 2 1 4 1  -2 $\pm$ 2 -115 110 0
$18.5 < R \leq 19.0$ 9 3 4 1   5 $\pm$ 4 282 254 9
$19.0 < R \leq 19.5$ 15 4 10 2   5 $\pm$ 6 297 397 11
$19.5 < R \leq 20.0$ 16 3 23 5  -7 $\pm$ 8 -420 541 1
$20.0 < R \leq 20.5$ 28 5 35 7   -7 $\pm$ 12 -470 739 5
All  R          -7 $\pm$ 18     +11
NGC 3226/7
$R \leq 18.0$ 5 3 7 4  -2 $\pm$ 7 -117 482 5
$18.0 < R \leq 18.5$ 4 1 4 2   0 $\pm$ 3 18 172 3
$18.5 < R \leq 19.5$ 4 1 4 1   0 $\pm$ 2 -21 141 2
$19.0 < R \leq 19.5$ 10 3 10 2   0 $\pm$ 5 5 323 5
$19.5 < R \leq 20.0$ 15 3 22 5  -7 $\pm$ 8 -452 555 1
$20.0 < R \leq 20.5$ 25 5 34 6   -9 $\pm$ 11 -607 731 2
All  R          -18 $\pm$ 16     -2
NGC 3656
$R \leq 18.0$ 8 5 7 4   1 $\pm$ 9 60 564 10
$18.0 < R \leq 18.5$ 3 1 4 1  -1 $\pm$ 2 -52 127 1
$18.5 < R \leq 19.0$ 7 2 4 1   3 $\pm$ 3 157 197 6
$19.0 < R \leq 19.5$ 8 2 10 2  -2 $\pm$ 4 -140 261 2
$19.5 < R \leq 20.0$ 21 5 23 5   -2 $\pm$ 10 -107 637 8
$20.0 < R \leq 20.5$ 29 5 35 7   -6 $\pm$ 12 -407 755 6
All  R          -7 $\pm$ 19     +12
Arp 299
$R \leq 18.0$ 8 5 7 4   1 $\pm$ 9 60 564 10
$18.0 < R \leq 18.5$ 8 3 4 1   4 $\pm$ 4 260 256 8
$18.5 < R \leq 19.0$ 4 1 5 1  -1 $\pm$ 2 -30 113 1
$19.0 < R \leq 19.5$ 15 4 10 2   5 $\pm$ 6 297 386 11
$19.5 < R \leq 20.0$ 19 4 23 5  -4 $\pm$ 9 -232 584 5
$20.0 < R \leq 20.5$ 27 2 35 7  -8 $\pm$ 9 -532 567 1
All  R          -3 $\pm$ 17     +14


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