2000A&A...362..799G

Query : 2000A&A...362..799G

2000A&A...362..799G - Astronomy and Astrophysics, volume 362799-808 (2000/10-3)

The BeppoSAX 2-10keV survey.

GIOMMI P., PERRI M. and FIORE F.

Abstract (from CDS):

We present the results of a 2-10keV BeppoSAX survey based on 140 high galactic latitude MECS fields, 12 of which are deep exposures of ``blank'' parts of the sky. The limiting sensitivity is 5x10–14erg/cm2/s where about 25% of the Cosmic X-ray Background (CXB) is resolved into discrete sources. The logN-logS function, built with a statistically complete sample of 177 sources, is steep and in good agreement with the counts derived from ASCA surveys. A CXB fluctuation analysis allowed us to probe the logN-logS down to about 1.5x10–14erg/cm2/s where the contribution of discrete sources to the CXB grows to ∼40-50%. A hardness ratio analysis reveals the presence of a wide range of spectral shapes and that a fairly large fraction of sources appear to be heavily absorbed, some of which showing soft components. A comparison of the flux distribution of different subsamples confirms the existence of a spectral hardening with decreasing flux. This effect is probably due to an increasing percentage of absorbed sources at faint fluxes, rather than to a gradual flattening of the spectral slope. Nearly all the sources for which adequate ROSAT exposures exist, have been detected in the soft X-rays. This confirms that soft spectral components are present even in strongly absorbed objects, and that a large population of sources undetectable below a few keV does not exist. A Ve/Va test provides evidence for the presence of cosmological evolution of a magnitude similar to that found in soft X-ray extragalactic sources. Evolution is present both in normal and absorbed sources, with the latter population possibly evolving faster, although this effect could also be the result of complex selection effects.

Abstract Copyright: ∼

Journal keyword(s): surveys - cosmology: observations - X-rays: galaxies - X-rays: general

VizieR on-line data: <Available at CDS (J/A+A/362/799): table1.dat>

Simbad objects: 181

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Number of rows : 181
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 [VV2006c] J002636.1-194416 Sy2 00 26 33.4 -19 44 07     18.1     ~ 5 0
2 M 31 AGN 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 13622 1
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 SAX J0056.3-2236 X 00 56 20.6 -22 36 52           ~ 1 0
5 1WGA J0057.0-2231 X 00 57 03.0 -22 31 19           ~ 1 0
6 SAX J0057.4-2209 X 00 57 28.5 -22 09 58           ~ 1 0
7 M 33 GiG 01 33 50.8965749232 +30 39 36.630403128 6.17 6.27 5.72     ~ 6226 1
8 SAX J0135.9-2954 X 01 35 54.8 -29 54 46           ~ 1 0
9 SAX J0149.1+1353 X 01 49 06.9 +13 53 40           ~ 1 0
10 SAX J0153.8+8910 X 01 53 51.4 +89 10 14           ~ 1 0
11 SDSS J020036.59+004549.2 Sy2 02 00 36.5962547160 +00 45 49.283682480   19.21 18.72     ~ 11 0
12 SAX J0223.4-0852 X 02 23 25.3 -08 52 25           ~ 1 0
13 SAX J0223.9-0843 X 02 23 57.0 -08 43 50           ~ 1 0
14 SAX J0243.1-0023 X 02 43 06.7 -00 23 40           ~ 1 0
15 SAX J0249.6+3124 X 02 49 37.0 +31 24 54           ~ 1 0
16 SAX J0250.2+3110 X 02 50 12.4 +31 10 41           ~ 1 0
17 [VV2000] J031329.1-551020 QSO 03 13 28.4056003848 -55 10 19.034959872   21.94 21.31 20.24   ~ 7 0
18 SAX J0314.9-5519 Rad 03 14 55.6 -55 19 13           ~ 1 0
19 SAX J0315.7-5517 AGN 03 15 42.1 -55 17 35           ~ 1 0
20 SAX J0315.7-5528 AGN 03 15 44.9 -55 28 25           ~ 1 0
21 QSO B0316-5531 QSO 03 17 32.7 -55 20 25     17.97     ~ 11 0
22 SAX J0325.3+0213 X 03 25 18.4 +02 13 59           ~ 1 0
23 QSO B0335-364 Bla 03 36 54.0235343784 -36 16 06.220332408   18.40 18 18.7   ~ 80 1
24 SAX J0406.1-7100 X 04 06 06.3 -71 00 44           ~ 1 0
25 BAX 061.7231-71.2655 ClG 04 06 45.0 -71 15 53     18.0     ~ 13 0
26 SAX J0407.5-1217 X 04 07 36.40 -12 17 15.5           ~ 1 0
27 SAX J0407.8-7127 X 04 07 53.6 -71 27 54           ~ 1 0
28 SAX J0410.6-7122 X 04 10 36.9 -71 22 33           ~ 1 0
29 SAX J0414.3-5557 X 04 14 18.8 -55 57 02           ~ 1 0
30 SAX J0424.2-5657 X 04 24 14.6 -56 57 58           ~ 1 0
31 LEDA 499934 Sy1 04 37 11.7 -47 31 47     17.3     ~ 8 0
32 [VV2006] J043847.0-472800 QSO 04 38 46.9909800144 -47 28 00.844078260     20.50     ~ 15 1
33 SAX J0515.2+0108 X 05 15 14.0 +01 08 55           ~ 1 0
34 ClG J0522-3624 ClG 05 22 13.8 -36 24 49           ~ 41 0
35 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 19090 0
36 SAX J0523.6-3630 X 05 23 36.3 -36 30 04           ~ 1 0
37 1RXS J052419.9-362210 Ro* 05 24 18.1916074488 -36 22 02.529975792   15.11 13.60 13.40 11.16 G5.3 16 0
38 2E 0535.2-4404 X 05 36 48.8 -44 02 01           ~ 1 0
39 SAX J0538.8-4413 X 05 38 50.1 -44 13 36           ~ 1 0
40 SAX J0539.8-4357 X 05 39 52.1 -43 57 30           ~ 1 0
41 SAX J0548.6-6052 X 05 48 37.9 -60 52 17           ~ 3 0
42 SAX J0549.9-6123 X 05 49 58.8 -61 23 18           ~ 1 0
43 SAX J0549.9-6102 X 05 49 59.5 -61 02 49           ~ 3 0
44 SAX J0550.6-6058 X 05 50 41.8 -60 58 57           ~ 1 0
45 SAX J0613.2+7053 X 06 13 14.1 +70 53 47           ~ 1 0
46 SAX J0613.8-6054 X 06 13 52.6 -60 54 10           ~ 1 0
47 SAX J0613.9-6100 X 06 13 59.1 -61 00 52           ~ 1 0
48 SAX J0623.7-6913 X 06 23 43.6 -69 13 51           ~ 1 0
49 SAX J0625.4-6918 X 06 25 27.9 -69 18 30           ~ 1 0
50 SAX J0718.9+7124 AGN 07 18 58.2 +71 24 50           ~ 1 0
51 SAX J0720.7+7109 ClG 07 20 42.5 +71 09 45           ~ 2 0
52 SAX J0733.2+3204 X 07 33 17.7 +32 04 43           ~ 1 0
53 SAX J0733.3+3151 X 07 33 21.7 +31 51 41           ~ 1 0
54 SAX J0733.9+3143 X 07 33 59.6 +31 43 27           ~ 1 0
55 SAX J0741.9+7427 X 07 41 57.9 +74 27 15           ~ 3 0
56 2E 1852 Sy1 07 43 12.5393029560 +74 29 36.758906988     17.53     ~ 27 0
57 2MASX J08373702+2547507 Sy1 08 37 37.0388008224 +25 47 50.539297812   19.19 18.33     ~ 31 0
58 SAX J0838.7+2600 X 08 38 47.5 +26 00 26           ~ 1 0
59 LEDA 1764122 Sy2 08 38 59.2789772232 +26 08 13.073863380           ~ 27 0
60 SAX J0914.8+4100 X 09 14 51.1 +41 00 50           ~ 1 0
61 SAX J0915.9+2928 X 09 15 56.9 +29 28 34           ~ 1 0
62 SAX J0916.3+2940 Bla 09 16 19.6 +29 40 10           ~ 1 0
63 SAX J0959.2-2255 X 09 59 17.897 -22 55 03.00           ~ 1 0
64 SAX J1006.5-2007 X 10 06 32.8 -20 07 05           ~ 1 0
65 SAX J1007.5-2025 X 10 07 33.1 -20 25 23           ~ 1 0
66 SAX J1007.6-2012 X 10 07 38.0 -20 12 28           ~ 1 0
67 SAX J1014.2+7318 X 10 14 13.9 +73 18 55           ~ 1 0
68 SAX J1015.9+7137 X 10 15 56.8 +71 37 35           ~ 1 0
69 SAX J1017.7+7113 X 10 17 46.1 +71 13 15           ~ 1 0
70 SAX J1017.9+7133 X 10 17 58.5 +71 33 54           ~ 1 0
71 SAX J1019.1+7131 X 10 19 06.3 +71 31 48           ~ 1 0
72 SAX J1020.3+1957 X 10 20 20.0 +19 57 08           ~ 1 0
73 2E 2262 Sy1 10 20 54.8968138032 +19 54 51.305235480   19.01 18.77     ~ 17 0
74 SAX J1021.5+7115 X 10 21 32.1 +71 15 54           ~ 1 0
75 SAX J1033.5+6854 X 10 33 34.3 +68 54 35           ~ 1 0
76 SAX J1036.2+5710 X 10 36 14.7 +57 10 06           ~ 1 0
77 SAX J1038.6+5714 X 10 38 37.8 +57 14 20           ~ 1 0
78 SAX J1050.1+3404 X 10 50 10.8 +34 04 22           ~ 1 0
79 [VV98] J105239.6+572432 QSO 10 52 39.5958253296 +57 24 31.425574788   18.39 18.07     ~ 76 0
80 SAX J1052.8+5731 AGN 10 52 48.0 +57 31 06           ~ 1 0
81 2XMM J105334.9+572542 AGN 10 53 35.0308257600 +57 25 42.141068976     19.50     ~ 25 0
82 2MASS J10542112+5725431 Sy1 10 54 21.1984001400 +57 25 44.284004364       18.80   ~ 47 1
83 V* DM UMa RS* 10 55 43.5438405648 +60 28 09.721480656   10.31 9.29     K0III-IV 176 0
84 SAX J1057.6+5625 X 10 57 40.2 +56 25 39           ~ 1 0
85 SAX J1057.8+6022 X 10 57 48.3 +60 22 15           ~ 1 0
86 SAX J1106.9-1815 X 11 06 56.9 -18 15 40           ~ 1 0
87 SAX J1106.9-1801 X 11 06 57.5 -18 01 26           ~ 1 0
88 SAX J1107.2-1838 X 11 07 14.9 -18 38 27           ~ 1 0
89 SAX J1120.3+1254 X 11 20 21.8 +12 54 08           ~ 1 0
90 SAX J1120.5+1306 X 11 20 35.5 +13 06 53           ~ 1 0
91 SAX J1134.9+7029 X 11 34 54.5 +70 29 18           ~ 1 0
92 SAX J1138.9-1336 X 11 38 59.6 -13 36 50           ~ 1 0
93 PKS 1138-137 rG 11 40 43.203 -14 02 12.66     18.5     ~ 6 1
94 SAX J1156.9+6527 X 11 56 59.9 +65 27 48           ~ 3 0
95 ACO 1455 ClG 12 04 04.0 +28 07 08           ~ 56 0
96 ClG J1217+4730 ClG 12 17 43.2 +47 29 12           ~ 16 0
97 2MASS J12185468+2958067 Sy1 12 18 54.6852101520 +29 58 06.638486016   20.1 21     ~ 23 0
98 SAX J1218.9+3012 X 12 18 55.2 +30 12 46           ~ 1 0
99 M 106 Sy2 12 18 57.620 +47 18 13.39   9.14 8.41 8.11   ~ 2512 4
100 [VV2000] J122135.6+280614 QSO 12 21 35.6445964968 +28 06 13.906166148   20.62 20.00     ~ 35 0
101 1AXG J122155+7525 BLL 12 22 06.5665656120 +75 26 15.144120672     18.70 17.40   ~ 33 0
102 2MASX J12221536+2821231 Sy2 12 22 15.3732625992 +28 21 23.766637968   18.01 17.43     ~ 21 0
103 SAX J1240.7-3653 X 12 40 44.7 -36 53 16           ~ 1 0
104 BAX 190.3879+32.8397 ClG 12 41 33.1 +32 50 23           ~ 19 0
105 SAX J1256.3+5909 X 12 56 20.8 +59 09 20           ~ 1 0
106 SAX J1305.2-1021 X 13 05 13.1 -10 21 01           ~ 2 0
107 SAX J1305.5-1032 Bla 13 05 32.4 -10 32 46           ~ 5 0
108 SAX J1316.4+2901 X 13 16 24.8 +29 01 13           ~ 1 0
109 SAX J1316.7+2913 X 13 16 47.5 +29 13 42           ~ 1 0
110 SAX J1321.5-1654 X 13 21 31.6 -16 54 17           ~ 1 0
111 SAX J1321.7-1635 X 13 21 47.5 -16 35 41           ~ 1 0
112 SAX J1323.4-1657 X 13 23 24.1 -16 57 19           ~ 1 0
113 SAX J1338.8+0454 X 13 38 49.6 +04 54 02           ~ 1 0
114 QSO B1340+0016 QSO 13 42 56.5179998064 +00 00 57.266019144   19.09 18.90     ~ 52 0
115 SAX J1343.9-0008 X 13 43 57.4 -00 08 53           ~ 1 0
116 SAX J1344.9-0016 AGN 13 44 58.0 -00 16 28           ~ 1 0
117 2MASX J13535438+1820158 Sy1 13 53 54.4019994192 +18 20 16.074646764   19.55 18.15     ~ 16 0
118 [VV96] J140437.6+261256 QSO 14 04 36.60 +26 12 57.0     19.58     ~ 6 0
119 SAX J1404.8+2553 X 14 04 52.5 +25 53 21           ~ 1 0
120 SAX J1429.3+4451 X 14 29 21.6 +44 51 40           ~ 1 0
121 SAX J1430.7+4507 X 14 30 45.5 +45 07 49           ~ 1 0
122 SAX J1512.4-0913 X 15 12 29.8 -09 13 21           ~ 1 0
123 ClG J1514+3636 ClG 15 14 22.0 +36 36 22     19.0     ~ 136 0
124 2MASS J15150497+3657214 QSO 15 15 04.9990266168 +36 57 21.520349100   20.17 19.65     ~ 11 0
125 SAX J1528.1+1954 X 15 28 07.6 +19 54 26           ~ 1 0
126 NAME VLA J1528.7+1945 GrG 15 28 45.4 +19 45 04           ~ 13 0
127 SAX J1528.8+1938 AGN 15 28 50.6 +19 38 11           ~ 1 0
128 SAX J1613.7+3412 Bla 16 13 43.1 +34 12 21           ~ 1 0
129 SAX J1633.6+5950 X 16 33 37.5 +59 50 36           ~ 1 0
130 SAX J1633.6+5942 X 16 33 37.9 +59 42 22           ~ 1 0
131 SAX J1634.1+5946 AGN 16 34 08.6 +59 46 24           ~ 1 0
132 SAX J1634.1+5938 X 16 34 10.7 +59 37 44           ~ 3 0
133 6C 163449+600111 BLL 16 35 37.64875163 +59 55 15.0768180           ~ 20 2
134 SAX J1651.8+0441 X 16 51 49.7 +04 41 04           ~ 1 0
135 SAX J1653.8+0208 X 16 53 51.0 +02 08 06           ~ 1 0
136 RX J1729.5+4904 X 17 29 26.4 +49 04 23           ~ 3 0
137 SAX J1731.1+6054 X 17 31 10.4 +60 54 57           ~ 1 0
138 SAX J1741.2+6753 X 17 41 17.0 +67 53 04           ~ 1 0
139 SAX J1741.5+6805 X 17 41 33.3 +68 05 02           ~ 1 0
140 SAX J1744.1+6221 X 17 44 11.3 +62 21 04           ~ 1 0
141 SAX J1745.3+6242 X 17 45 21.8 +62 42 09           ~ 1 0
142 SAX J1751.5+6100 X 17 51 30.3 +61 00 43           ~ 3 0
143 SAX J1751.6+6119 X 17 51 36.8 +61 19 56           ~ 1 0
144 SAX J1752.6+6105 X 17 52 36.5 +61 05 33           ~ 3 0
145 SAX J1753.0+6120 X 17 53 03.3 +61 20 31           ~ 1 0
146 SAX J1753.8+6059 X 17 53 50.9 +60 59 37           ~ 3 0
147 SAX J1757.7+6110 X 17 57 47.2 +61 10 34           ~ 1 0
148 SAX J1758.2+6118 X 17 58 14.9 +61 18 41           ~ 1 0
149 SAX J1759.1+7832 X 17 59 07.9 +78 32 43           ~ 1 0
150 SAX J1803.8+6110 X 18 03 53.1 +61 10 24           ~ 3 0
151 [VV2000] J180434.3+693737 QSO 18 04 34.4566626216 +69 37 37.253147412     18.10     ~ 14 0
152 SAX J1805.3+6057 X 18 05 18.5 +60 57 49           ~ 1 0
153 2MASX J18081311+6948054 Sy2 18 08 13.2112485240 +69 48 05.897569824           ~ 9 0
154 SAX J1818.9+6114 X 18 18 59.7 +61 14 48           ~ 3 0
155 SAX J1819.3+6056 X 18 19 18.5 +60 56 24           ~ 3 0
156 SAX J1819.6+6053 X 18 19 39.5 +60 53 24           ~ 3 0
157 SAX J1834.5+5147 X 18 34 34.4 +51 47 43           ~ 1 0
158 SAX J1936.0-5238 X 19 36 05.4 -52 38 04           ~ 1 0
159 QSO B2037-325 QSO 20 40 31.5430500552 -32 23 18.236767344   18.72 18.39     ~ 7 0
160 SAX J2041.1-3247 X 20 41 09.0 -32 47 01           ~ 1 0
161 SAX J2041.9-3215 X 20 41 59.8 -32 15 36           ~ 1 0
162 4C -04.80 QSO 20 55 50.2582062288 -04 16 47.084098836   18.0 18.0     ~ 34 1
163 QSO B2053-0503 QSO 20 55 52.5743208312 -04 52 01.755735996     17.27     ~ 10 0
164 SAX J2056.2-0446 X 20 56 12.6 -04 46 11           ~ 1 0
165 SAX J2225.2+2102 X 22 25 14.0 +21 02 05           ~ 1 0
166 QSO B2224+2056 QSO 22 26 31.749 +21 11 37.71     17.70     ~ 12 0
167 SAX J2242.7+2935 X 22 42 46.8 +29 35 16           ~ 1 0
168 SAX J2244.7-1213 X 22 44 42.9 -12 13 20           ~ 1 0
169 SAX J2245.5-1200 X 22 45 35.8 -12 00 27           ~ 1 0
170 SAX J2305.9+0902 Bla 23 05 55.3 +09 02 33           ~ 1 0
171 SAX J2306.9+0902 X 23 06 58.8 +09 02 49           ~ 1 0
172 SAX J2307.0+0850 X 23 07 01.0 +08 50 04           ~ 1 0
173 SAX J2327.4+0845 X 23 27 26.1 +08 45 50           ~ 2 0
174 HELLAS 209 Sy1 23 27 28.7 +08 49 25     18.5     ~ 7 0
175 SAX J2327.5+0323 X 23 27 34.2 +03 23 02           ~ 1 0
176 SAX J2327.6+0838 X 23 27 40.1 +08 38 30           ~ 1 0
177 SAX J2328.4+0854 X 23 28 29.3 +08 54 09           ~ 1 0
178 SAX J2328.9+0854 X 23 28 54.6 +08 54 08           ~ 1 0
179 SAX J2335.0-5601 X 23 35 00.7 -56 01 15           ~ 1 0
180 SAX J2335.2-5609 X 23 35 12.1 -56 09 09           ~ 1 0
181 RX J2359.9+0833 Sy1 23 59 59.2936255560 +08 33 54.036986796     15.40     ~ 12 0

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