2008A&A...480...61L

Query : 2008A&A...480...61L

2008A&A...480...61L - Astronomy and Astrophysics, volume 480, 61-68 (2008/3-2)

Analysis of possible anomalies in the QSO distribution of the Flesch & Hardcastle catalogue.

LOPEZ-CORREDOIRA M., GUTIERREZ C.M., MOHAN V., GUNTHARDT G.I. and ALONSO M.S.

Abstract (from CDS):

A recent catalogue by Flesch & Hardcastle (2004A&A...427..387F) presents two major anomalies in the spatial distribution of QSO candidates: i) an apparent excess of such objects near bright galaxies, and ii) an excess of very bright QSO candidates compared to random background expectations in several regions of the sky. Because anyone of these anomalies would be relevant in a cosmological context, we carried out an extensive analysis of the probabilities quoted in that catalogue. We determine the nature and redshift of a subsample of 30 sources in that catalogue by analysing their optical spectra (another 11 candidates were identified from existing public databases). These have allowed us to statistically check the reliability of the probabilities QSO status quoted by Flesch & Hardcastle (2004A&A...427..387F) for their candidates. Only 12 of the 41 candidates turned out QSOs (7 of which have been identified here for the first time). The probabilities of the QSOs' being the candidates given by Flesch & Hardcastle (2004A&A...427..387F) are overestimated for mB≤17 and for objects projected near (≤1arcmin) bright galaxies. This is the cause of the anomalies mentioned above.

Abstract Copyright: ∼

Journal keyword(s): quasars: general - galaxies: statistics - distance scale - catalogs

Simbad objects: 74

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Number of rows : 74
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 2MASS J00571963-4854061 QSO 00 57 19.6460068368 -48 54 06.494079168   17.1   16.8   ~ 4 0
2 IC 1605 Sy2 00 57 37.5949630344 -48 54 10.002427308   13.82       ~ 25 0
3 NAME Sculptor Dwarf Galaxy G 01 00 09.4 -33 42 32   9.79 8.6 8.81   ~ 1359 4
4 2MASS J01002287-3341266 * 01 00 22.8387606216 -33 41 26.531311488   18.01 17.44     ~ 4 0
5 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 880 0
6 2MASS J01234677-5847443 * 01 23 46.7781771528 -58 47 44.303344800   15.7   14.9   ~ 2 0
7 2MASS J02264006-0552376 AGN 02 26 40.0683127392 -05 52 37.803264204   14.3   14.2   ~ 7 1
8 2MASS J02495872-5503193 QSO 02 49 58.7371851672 -55 03 19.414816308   15.4   15.3   ~ 5 0
9 NGC 1136 AG? 02 50 53.7416212704 -54 58 33.345852888   13.80   12.26   ~ 25 0
10 2MASS J02522788-2032414 QSO 02 52 27.8797609056 -20 32 41.394644088   16.5   16.3   ~ 3 0
11 PHL 1459 blu 02 52.5 -20 33   17.2 17.3     ~ 1 0
12 MCG-01-12-005 Sy2 04 25 51.336 -08 33 38.98   15.5   16.9   ~ 43 2
13 QORG J044147.1-011756 HII 04 41 47.1 -01 17 56   17.1   17.5   ~ 2 0
14 UGC 3134 Sy2 04 41 48.2570161128 -01 18 06.785988372   13.7   13.3 13.5 ~ 41 0
15 2MASS J04544537-1808340 * 04 54 45.3845503944 -18 08 34.087156296   16.3   15.8   ~ 2 0
16 ESO 552-20 BiC 04 54 52.262 -18 06 56.12   13.34   11.64   ~ 64 1
17 QORG J050137.6-041557 PoG 05 01 37.48 -04 15 57.5   17.7   17.4   ~ 5 0
18 2MASX J05013782-0415294 G 05 01 37.832 -04 15 28.48   13.44   12.76   ~ 71 1
19 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17432 0
20 2MASS J05271650+0148390 WD? 05 27 16.5105364464 +01 48 39.079056888   14.8   14.5   A1IV-VSrSi 3 0
21 Brun 864 Y*O 05 35 47.7934095288 -05 10 30.811963080   13.12 11.71 13.7   K2: 35 0
22 V* V1762 Ori Or* 05 35 54.4746845160 -04 48 04.985564112   13.08 12.21 14.8 10.74 G6 33 0
23 Brun 950 Y*O 05 36 06.3132811104 -05 41 56.632874424   14.2 11.695 13.8 10.688 G3V 24 0
24 X LMC X-3 HXB 05 38 56.6323605504 -64 05 03.317937504   17 17.2     B2.5Ve 675 0
25 PM J05425+1525 PM* 05 42 31.76280 +15 25 01.4232   15.23 13.64 13.37   M3.5V 9 0
26 KPD 0631+1043 WD* 06 33 50.2953950856 +10 41 18.057493176 12.60 13.65 13.82 14.00   DA1.8 42 0
27 2MASS J07051187+3718423 * 07 05 11.8721172072 +37 18 42.363293184   15.1   14.1   ~ 2 0
28 UGC 4305 IG 08 19 04.9864630512 +70 43 13.086910452 12.06 11.72 11.39 11.11   ~ 769 2
29 MCG+06-19-001 BiC 08 19 21.9141970080 +35 02 49.952162796   14.6       ~ 19 0
30 [CVL2009] UGC 4305-3 HII 08 19 28.88 +70 42 19.5   13.4   12.9   ~ 16 0
31 FBQS J0820+3459 * 08 20 08.2118445720 +34 59 53.880223776           ~ 3 0
32 2MASS J08410388+0321165 WD? 08 41 03.8845887528 +03 21 16.587060228   15.1   15.4   ~ 9 0
33 2MASS J08430805+1044187 QSO 08 43 08.0743408248 +10 44 18.820791960   17.43 17.11 17.2   ~ 4 0
34 UGC 4552 G 08 43 21.3915347760 +10 43 33.906852012   15.0       ~ 23 0
35 UGC 5048 AG? 09 28 37.544 +38 32 21.36   15.2       ~ 20 0
36 2MASS J09284517+3831134 Sy1 09 28 45.1759063968 +38 31 13.413779832   18.46 18.16     ~ 37 0
37 [KK2001] ACO 1377 99 GiC 11 47 13.0105303440 +55 42 44.003801952   17.9   17.3   ~ 6 0
38 MCG+09-19-182 BiC 11 47 21.3814927776 +55 43 48.542981664   16.55       ~ 26 0
39 QORG J120442.4+311031 HII 12 04 42.4 +31 10 31   17.4   17.0   ~ 2 0
40 2MASX J12044519+3109337 GiG 12 04 45.1444308312 +31 09 34.459451064   15.2       ~ 33 0
41 [VV2006] J120525.7+513140 QSO 12 05 25.7888845608 +51 31 40.776153132   18.89 18.91 17.6   ~ 30 0
42 UGC 7082 G 12 05 32.1524732688 +51 30 16.552908648   15.3       ~ 24 0
43 [VV2006] J120703.4+652406 QSO 12 07 03.4295955048 +65 24 06.254118684   17.32 17.08     ~ 29 1
44 UGC 7110 LSB 12 07 26.089 +65 24 44.39   17       ~ 12 0
45 2MASS J12215776+2604576 Sy1 12 21 57.7751353992 +26 04 57.725899428   18.29 17.87 17.2   ~ 24 0
46 IC 3215 GiC 12 22 10.1785396080 +26 03 07.764959592   15.7       ~ 38 0
47 2MASS J13201412+3307530 * 13 20 14.1231310704 +33 07 52.895030448   15.7   15.3   ~ 2 0
48 NGC 5098 BiC 13 20 14.7283808160 +33 08 36.294146268   15.0       ~ 107 2
49 MCG+06-29-078 GiG 13 20 17.7415023768 +33 08 41.052800724   15.0       ~ 28 2
50 [VV2006] J134210.6+604741 QSO 13 42 10.5745690752 +60 47 40.680675816   18.42 18.20 17.8   ~ 25 0
51 UGC 8684 GiG 13 42 15.916 +60 46 36.39   14.5       ~ 62 0
52 GPM 214.495240+25.092724 * 14 17 58.8148608552 +25 05 33.154737828   14.572 13.916 14.6   ~ 7 0
53 NGC 5548 Sy1 14 17 59.5400291832 +25 08 12.603122268   14.35 13.73     ~ 2709 0
54 IC 4423 AGN 14 26 17.7287818992 +26 14 46.240032912   15.5       ~ 55 0
55 QORG J142618.6+261452 HII 14 26 18.6 +26 14 52   17.2   17.0   ~ 2 0
56 HS 1440+7518 WD* 14 40 05.1341163672 +75 05 33.787957776   15.1 15.3 15.2   DA1 57 0
57 2MASS J16125089+0002536 * 16 12 50.9038897536 +00 02 53.722502304   15.2   14.5   ~ 2 0
58 UGC 10264 EmG 16 12 56.8257618576 -00 05 46.502416680   14.9       ~ 31 0
59 [OKM2018] SWIFT J1737.7-5956B Sy2 17 37 39.0797034192 -59 56 26.644818696   13.61   12.84 12.7 ~ 77 0
60 2MASS J17374260-5953415 * 17 37 42.6138593952 -59 53 41.577309456   17.6   16.9   ~ 2 0
61 NGC 6654 AG? 18 24 07.6171148928 +73 10 59.672609364   12.70       ~ 83 0
62 2MASS J18243640+7310456 QSO 18 24 36.3783930984 +73 10 45.906414816   17.5   17.3   ~ 2 0
63 2MASS J20093819-4917445 QSO 20 09 38.1843413424 -49 17 44.584685484   17.0   16.7   ~ 2 0
64 ESO 233-37 GiP 20 09 39.1458990144 -49 19 54.055276752   14.56   13.26   ~ 23 0
65 2MASS J20124262-5400299 PM* 20 12 42.6215328048 -54 00 29.936840364   14.4   14.3   ~ 2 0
66 IC 4969 G 20 12 55.1 -53 55 15   15.15   14.40   ~ 4 0
67 ESO 528-36 BiC 20 43 45.7162393728 -26 33 00.846917064   14.90 13.52 12.99   ~ 21 0
68 2MASS J20434661-2635035 * 20 43 46.6134723240 -26 35 03.548762160   17.8   17.4   ~ 2 0
69 NGC 7339 rG 22 37 46.890 +23 47 12.02   13.1       ~ 134 0
70 2MASS J22374931+2345409 QSO 22 37 49.3357094208 +23 45 40.980844008   17.7   17.2   ~ 2 0
71 2MASS J22575235+2606384 * 22 57 52.3532663304 +26 06 38.511856260   17.9   17.1   ~ 2 0
72 NGC 7435 GiG 22 57 54.4911121152 +26 08 19.719186720   15.5       ~ 20 0
73 [SM98] 6 * 23 38 41.6479675992 +26 48 03.923961732   16.9   17.1   ~ 3 0
74 UGC 12719 GiC 23 38 42.3784362384 +26 46 26.130242100   15.7       ~ 16 0

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