2005A&A...433..855M


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.28CET20:09:50

2005A&A...433..855M - Astronomy and Astrophysics, volume 433, 855-873 (2005/4-3)

X-ray spectra of XMM-Newton serendipitous medium flux sources.

MATEOS S., BARCONS X., CARRERA F.J., CEBALLOS M.T., CACCIANIGA A., LAMER G., MACCACARO T., PAGE M.J., SCHWOPE A. and WATSON M.G.

Abstract (from CDS):

We report on the results of a detailed analysis of the X-ray spectral properties of a large sample of sources detected serendipitously with the XMM-Newton observatory in 25 selected fields, for which optical identification is in progress. The survey covers a total solid angle of ∼3.5deg2 and contains 1137 sources with ∼10–15<S0.5–10<10–12erg/cm2/s with good enough spectral quality as to perform a detailed X-ray spectral analysis of each individual object. We find evidence for hardening of the average X-ray spectra of the sources towards fainter fluxes, and we interpret this as indicating a higher degree of photoelectric absorption amongst the fainter population. Absorption is detected at 95% confidence in 20% of the sources, but it could certainly be present in many other sources below our detection capabilities. For Broad Line AGNs (BLAGNs), we detect absorption in ∼10% of the sources with column densities in the range 1021-1022cm–2. The fraction of absorbed Narrow Emission Line galaxies (NELGs, most with intrinsic X-ray luminosities >1043erg/s, and therefore classified as type 2 AGNs) is significantly higher (40%), with a hint of moderately higher columns. After correcting for absorption, we do not find evidence for a redshift evolution of the underlying power law index of BLAGNs, which stays roughly constant at Γ∼1.9, with intrinsic dispersion of 0.4. A small fraction (∼7%) of BLAGNs and NELGs require the presence of a soft excess, that we model as a black body with temperature ranging from 0.1 to 0.3keV. Comparing our results on absorption to popular X-ray background synthesis models, we find absorption in only ∼40% of the sources expected. This is due to a deficiency of heavily absorbed sources (with NH∼1022-1024cm–2) in our sample in comparison with the models. We therefore conclude that the synthesis models require some revision in their specific parameters.

Abstract Copyright:

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

CDS comments: Table 1 some objects not identified (incomplete format). XMMU J33106.2+241325, XMMU J12226.1+752616, XMMU J13316.2+241326, XMMU J233113.6+20056, XMMU J122312.6+75247 not identified (incomplete format. Comple te format = XMMU JHHMMSS.s+DDMMSS).

Simbad objects: 38

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Number of rows : 38

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 2690 ClG 00 00 13.75 -25 11 11.5           ~ 23 0
2 QSO B0015+162 QSO 00 18 32.008 +16 29 25.81   19 18.26 18.40   ~ 38 0
3 ClG 0016+16 ClG 00 18 33.3 +16 26 36           ~ 476 0
4 XMS J010320.3-064159 G 01 03 20.3 -06 41 59           ~ 2 0
5 Ross 17 PM* 02 10 04.8094976131 +35 25 49.493441738   15.4   13.3   M3 33 0
6 [VV2006] J021808.2-045845 QSO 02 18 08.2446057211 -04 58 45.312108634   18.7462 18.7613 16.80   ~ 37 0
7 2MASS J02182216-0506141 AGN 02 18 22.1642380530 -05 06 14.249249592   16.4753 15.7476 10.80   ~ 25 0
8 [VV2006] J021830.5-045622 QSO 02 18 30.5903879680 -04 56 22.903431876     17.60 16.90   ~ 22 0
9 2XMM J021908.3-044731 AGN 02 19 08.390 -04 47 31.17           ~ 7 0
10 Mrk 3 Sy2 06 15 36.458 +71 02 15.24 14.21 14.03 12.97     ~ 861 3
11 2XMM J061728.3+710559 AGN 06 17 28.5 +71 05 59       19.30   ~ 4 0
12 XMS J061731.0+705955 AGN 06 17 30.7 +70 59 53       19.27   ~ 3 0
13 2E 1852 Sy1 07 43 12.5399540807 +74 29 36.758785678     17.53     ~ 26 0
14 4C 71.07 QSO 08 41 24.36526906 +70 53 42.1730054     16.5 16.8   ~ 709 1
15 [BBS2002] Cl J0841 38 QSO 08 41 32.3389841361 +70 47 57.404808180       17.30   ~ 4 0
16 XMMU J084211.6+710145 AGN 08 42 11.8 +71 01 46       18.20   ~ 3 0
17 ACO 851 ClG 09 42 56.6 +46 59 22           ~ 309 0
18 7C 1028+3118 BLL 10 30 59.0937266368 +31 02 55.722180791   17.07 16.71 16.1   ~ 170 1
19 Ton 580 Sy1 11 31 09.4822135528 +31 14 05.506427771   16.22 16.05 15.8   ~ 132 1
20 NGC 4291 GiG 12 20 17.699 +75 22 15.47   17.0       ~ 286 1
21 Mrk 205 Sy1 12 21 44.0723278508 +75 18 38.242986688   15.64 15.24 14.7   ~ 453 0
22 QSO B1229+6430 BLL 12 31 31.3953946380 +64 14 18.288194641   18.36 17.62 14.3   ~ 126 2
23 V* FK Com Ro* 13 30 46.7993742986 +24 13 57.786184235   9.04 8.245   7.204 G4III 352 1
24 V* UZ Lib SB* 15 32 23.2091329303 -08 32 00.933695382   10.12 9.115   7.904 K0III 112 1
25 XMMU J212904.5-154448 AGN 21 29 04.6 -15 44 48       19.35   ~ 3 0
26 QSO B2126-15 QSO 21 29 12.17589777 -15 38 41.0413097   17.61 17.3 17.3   ~ 472 1
27 2E 2135.0-1446 Sy1 21 37 45.1960175219 -14 32 55.696077090 15.41 15.63 15.53 15.0   ~ 354 0
28 ClG 2137-2353 ClG 21 40 12.8 -23 39 27     18.5     ~ 352 0
29 [VV2006] J214041.5-234719 QSO 21 40 41.4649967595 -23 47 19.216818275           ~ 12 0
30 QSO B2202-0209 QSO 22 05 09.90 -01 55 18.0   17.5 17.5     ~ 23 0
31 2XMM J221454.9-173949 G 22 14 54.9 -17 39 49           ~ 2 0
32 LBQS 2212-1747 QSO 22 15 15.2453879922 -17 32 21.804253516   18.89 18.3 17.30   ~ 16 0
33 2XMM J221523.6-174318 QSO 22 15 23.6659622611 -17 43 18.357649152   20.27   20.41   ~ 7 0
34 LBQS 2212-1759 QSO 22 15 31.6805723362 -17 44 08.255084112     18.3     ~ 51 0
35 XMMU J222823.6-051306 QSO 22 28 23.666 -05 13 06.03       19.98   ~ 3 0
36 QSO B2225-055 QSO 22 28 30.3462442018 -05 18 54.698267552   18.45 17.70     ~ 155 0
37 NAME South America H2G 22 51 49.307 -17 52 23.96   16.97       ~ 288 3
38 BD+19 5116 ** 23 31 52.17898 +19 56 14.1505 12.737 11.749 10.165 8.982 7.446 M4+M5 425 0

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2021.02.28-20:09:50

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