Table 3: The relative intensity enhancement dI/I of each of the 7 blobs (columns) as a percentage of the background intensity, after the subtraction of the background intensity (minimal intensity for each location). The intensity enhancements are calculated at 8 different positions along the track (rows).

Position (pixels)	B1	B2	B3	B4	B5	B6	B7
606 (A)	/	35.8	39.0	29.5	20.0	/	64.2
514	17.4	31.1	23.8	12.2	28.0	44.8	51.1
438 (B)	27.9	31.1	/	18.4	/	92.1	47.9
361	30.3	40.9	/	29.3	/	141.9	77.7
280 (C)	19.9	/	22.0	15.7	115.7	115.7	62.0
208	18.6	/	23.9	24.9	98.6	90.2	61.8
120 (D)	/	/	15.5	41.8	111.3	80.7	41.8
45	/	/	/	54.4	112.3	84.9	42.8
mean	22.9	34.7	25.9	28.3	66.7	92.9	56.2
st.dev	5.9	4.7	11.6	14.1	9.4	30.2	12.4
dn/n	11.5	17.4	13.0	14.2	33.4	46.5	28.1