Reconstructing the intergalactic UV background with QSO absorption lines

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Table 1

Fitted line parameters.

QSO	Ion	z	log N	b (km s^-1)

HE 1347-2457	H i	1.7529056	15.486 ± 0.112	17.56 ± 0.50
	C ii	1.7528981	14.087 ± 0.016	6.03 ± 0.10
	C iv	1.7528915	14.620 ± 0.018	7.46 ± 0.06
	Mg ii	1.7528971	12.816 ± 0.008	4.50 ± 0.06
	Al ii	1.7529035	11.600 ± 0.013	6.09 ± 0.31
	Al iii	1.7529033	12.229 ± 0.006	4.64 ± 0.12
	Si ii	1.7529005	12.910 ± 0.018	4.79 ± 0.11
	Si iii	1.7529052	13.553 ± 0.142	6.30 ± 0.42
	Si iv	1.7528871	13.621 ± 0.007	6.29 ± 0.05

HS 1700+6416	H i	2.3798685	15.414 ± 0.170	26.49 ± 1.55
	C iii	2.3799345	13.495 ± 0.187	8.64 ± 1.63
	C iv	2.3799374	13.059 ± 0.005	9.69 ± 0.14
	Si iii	2.3799212	11.689 ± 0.035	6.66 ± 0.84
	Si iv	2.3799238	11.689 ± 0.037	5.74 ± 0.99

HE 0940-1050	H i	2.8265295	14.612 ± 0.005	20.13 ± 0.22
	C iii^a	2.8265585	13.232 ± 0.013	6.35 ± 0.00
	C iv	2.8265585	13.218 ± 0.005	6.35 ± 0.13
	Si iii^a	2.8265616	11.461 ± 0.018	6.59 ± 0.00
	Si iv	2.8265616	12.037 ± 0.020	6.59 ± 0.02

Notes.

^(a)

Redshifts and Doppler-parameters of C iii and Si iii have been set to the measured values of the C iv and Si iv profiles, respectively.

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