The X-ray properties of z ~ 6 luminous quasars

R. Nanni; C. Vignali; R. Gilli; A. Moretti; W. N. Brandt

doi:10.1051/0004-6361/201730484

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Volume 603 (July 2017)

A&A, 603 (2017) A128

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Table 2

X-ray counts and hardness ratio.

Object	X-ray counts Chandra/XMM^a			HR ^b
Object	0.5−7.0 keV	0.5−2.0 keV	2.0−7.0 keV	HR ^b

NDWFS J1427+3522	<6.4	<5.0	<1.4	−
RD J1148+5253	3.3	0.9	2.4	−0.45
′′ ^c	<71.3	<57.9	<13.4	−
SDSS J0129−0035 ^c	<1.3	<1.1	<0.2	−
SDSS J1044−0125 ^c	22.9	19.2	3.1	−0.72
SDSS J0836+0054	21.9	17.8	3.0	−0.71
SDSS J0002+2550	5.8	5.8	<3.0	<−0.32
SDSS J0840+5624	4.8	3.8	1.0	−0.58
SDSS J0005−0006	18.4	16.6	1.6	−0.82
NDWFS J1425+3254	<6.7	<5.3	<1.4	−
SDSS J1335+3533	4.6	3.8	0.8	−0.56
SDSS J1411+1217	11.9	9.9	2.0	−0.66
PSO J328.7339−09.5076 ^c	<28.2	<22.9	<5.3	−
SDSS J2053+0047	<6.6	<4.7	<1.9	−
ULAS J0148+0600 ^c	<10.1	<8.2	<1.9	−
PSO J007.0273+04.9571	<33.2	<28.2	<5.0	−
CFHQS J0216−0455 ^c	<65.2	<53.0	<12.2	−
SDSS J1306+0356	125.4	87.3	38.1	−0.39
SDSS J1630+4012	15.3	10.8	4.5	−0.41
SDSS J0303−0019	<3.8	<3.0	<0.8	−
SDSS J1602+4228	25.7	21.8	3.8	−0.70
HSC J2216−0016 ^c	<3.0	<2.4	<0.6	−
SDSS J1048+4637	2.9	2.9	<3.0	<0.02
SDSS J1623+3112	6.0	4.0	2.0	−0.33
SDSS J0100+2802	12.0	10.7	0.7	−0.88
′′ ^c	154.5	127.9	25.8	−0.66
ATLAS J025.6821−33.4627 ^d	13.0	10.4	1.6	−0.73
SDSS J1030+0524	6.0	6.0	<3.0	<−0.33
′′ ^c	148.0	128.8	19.0	−0.74
SDSS J1148+5251	36.8	25.9	10.9	−0.41
′′ ^c	4.3	3.1	1.2	−0.44
CFHQS J0210−0456 ^c	<32.8	<26.7	<6.1	−
ULAS J1120+0641	5.7	4.0	1.7	−0.40
′′ ^c	34.0	30.7	3.1	−0.82

Notes.

^(a)

Errors on the X-ray counts were computed according to Tables 1 and 2 of Gehrels (1986) and correspond to the 1σ level in Gaussian statistics. The upper limits are at the 3σ confidence level.

^(b)

The hardness ratio is defined as where H and S are the counts in the hard (2.0–7.0 keV) and soft (0.5–2.0 keV) bands. We calculated errors at the 1σ level for the hardness ratio following the method described in Sect. 1.7.3 of Lyons (1991).

^(c)

Sources observed by XMM for which we provide EPIC pn information.

^(d)

Source observed by Swift-XRT.

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