(1)		(1.5)		(2)		(3)		(4)
Variable	Unit		Initial_value	Mean ± std	Median
Rflat		(pix)		6.0		5.9 ± 0.25	5.9
p		()		1.75		1.73 ± 0.044	1.72
FWHM		(pix)		27.8		28.3 ± 0.83	28.2
∆r		(10**-2 pix)	0.0		-0.36 ± 2.0	-0.41
a		()		0.00		-0.00 ± 0.020	-0.00	
b		(10**-3)	0.2		0.2 ± 0.02	0.2
N0		(10**22 cm**-2)	1.0		1.0 ± 0.02	1.0