2011A&A...533A..79M

Query : 2011A&A...533A..79M

2011A&A...533A..79M - Astronomy and Astrophysics, volume 533A79-79 (2011/9-1)

Flux density measurements of a complete sample of faint blazars.

MANTOVANI F., BONDI M. and MACK K.-H.

Abstract (from CDS):

We performed observations with the Effelsberg 100-m radio telescope to measure flux densities and polarised emission of sources selected from the ``Deep X-ray Radio Blazar Survey'' (DXRBS) to better define their spectral index behaviour in the radio band, with the aim to construct a homogeneous sample of blazars. Sources were observed at four different frequencies with the Effelsberg 100-m telescope. We complemented these measurements with flux density data at 1.4GHz derived from the NRAO VLA Sky Survey (NVSS). The spectral indices of a sample of faint blazars were computed making use of almost simultaneous measurements. Sixty-six percent of the sources can be classified as ``bona fide'' blazars. Seven objects show a clearly inverted spectral index. Seventeen sources previously classified as flat spectrum radio quasars (FSRQ) are actually steep spectrum radio quasars (SSRQ). The flux densities obtained with the Effelsberg 100-m telescope at 5GHz are compared with the flux densities listed in the Green Bank (GB6) survey and in the Parkes-MIT-NRAO (PMN) catalogue. About 43% of the sources in our sample exhibit flux density variations on temporal scales of 19 or 22 years. We confirm that 75 out of 103 sources of the DXRBS are indeed FSRQs. Twenty-seven sources show a spectral index steeper than -0.5 and should be classified as SSRQs. Polarised emission was detected for 36 sources at 4.85GHz. The median value of the percentage of polarised emission is (5.8±0.9)%. Five sources show rotation measure (RM) values >200rad/m2.

Abstract Copyright: ∼

Journal keyword(s): radio continuum: general - methods: observational - galaxies: active - quasars: general

Simbad objects: 105

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Number of rows : 105
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 LEDA 897757 Bla 00 12 33.90624 -16 28 07.2192   17.57 17.7 15.95   ~ 21 2
2 9C J0015+3052 QSO 00 15 36.0222255096 +30 52 29.787119004     16.30 16.33   ~ 17 1
3 [VV98] J002903.5+050934 Bla 00 29 03.5918457912 +05 09 34.864702740   20.0 19.0 18.6   ~ 51 1
4 [VV98] J010644.1-103409 Bla 01 06 44.1578365704 -10 34 10.591142088   18.32 18.25 17.6   ~ 53 2
5 [VV98] J011035.5-164823 Bla 01 10 35.5114298400 -16 48 27.701645760     15.60 15.8   ~ 46 1
6 [VV98] J012505.4+014627 Bla 01 25 05.5121088408 +01 46 26.935971024   19.6 19.86 19.1   ~ 33 1
7 [VV2006] J012615.0-050122 Bla 01 26 15.0628767384 -05 01 23.133157356     18.30     ~ 9 0
8 4C 15.05 Bla 02 04 50.41389294 +15 14 11.0436097   21.9 21.00 21.00   ~ 426 1
9 [VV98] J021000.1-100354 Bla 02 10 00.2224081752 -10 03 54.294343812   19.65 19.48 19.8   ~ 49 1
10 NVSS J022732-084812 Bla 02 27 32.0761626408 -08 48 12.210448680   18.73 18.56 18.85   ~ 42 0
11 2MASX J02451349+1047230 BLL 02 45 13.4738487648 +10 47 22.850288988     16.50 12   ~ 24 0
12 US 3621 Bla 03 04 58.9750802088 +00 02 35.750540328   18.23 18.06 18.4   ~ 56 1
13 1WGA J0322.6-1335 Bla 03 22 38.48740320 -13 35 18.0637440       22   ~ 14 1
14 PMN J0340-1813 rG 03 40 47.98 -18 14 00.6     19.6     ~ 8 1
15 [VV98] J041059.5-163611 Bla 04 10 59.4576058512 -16 36 10.594788552     16.70 16.8   ~ 21 1
16 [VV98c] J041403.1-130637 QSO 04 14 03.0 -13 07 12     22.0     ~ 4 0
17 [VV98] J041405.9-122417 BLL 04 14 05.9299170408 -12 24 19.044457380     18.30     ~ 9 1
18 2MASX J04213310+1433544 BLL 04 21 33.091 +14 33 54.28     18.80     ~ 15 0
19 [VV2006] J042714.2-075623 Bla 04 27 14.2364706168 -07 56 24.973397448     21.00 17.9   ~ 13 1
20 [VV98] J043419.0-144255 Bla 04 34 19.02513949 -14 42 55.3582230     21.20 19.45   ~ 38 1
21 AT20G J043508-081102 Bla 04 35 08.3618469696 -08 11 02.767065648     21.1 19.5   ~ 16 1
22 [VV98] J044754.6-032241 Bla 04 47 54.7361835696 -03 22 42.262778604     15.94 15.4   ~ 31 0
23 QSO B0459+135 BLL 05 02 33.21951873 +13 38 10.9588181   20.0 20.5 19.22   ~ 66 1
24 QSO B0507+179 Bla 05 10 02.36912937 +18 00 41.5815635   20.0 19.0 19.09   ~ 470 1
25 [VV98] J051351.9+015655 QSO 05 13 52.4730368784 +01 57 10.327959072     16.5     ~ 18 2
26 4C 06.22 QSO 05 18 15.9406797792 +06 24 22.717790316     19.00     ~ 15 1
27 [VV98] J053512.2-023906 Bla 05 35 12.2702051280 -02 39 06.718713804     18.70 18.5   ~ 17 1
28 8C 0641+681 QSO 06 46 42.2187808320 +68 07 41.705969448     19.70     ~ 10 1
29 7C 064621.69+695858.00 QSO 06 51 54.3908292624 +69 55 25.674713760     20.00     ~ 13 1
30 QSO J0724-0715 Bla 07 24 17.29262676 -07 15 20.3524062     18.00     ~ 38 1
31 7C 074143.50+292721.00 Bla 07 44 51.3643230792 +29 20 06.038217348   17.20 16.97 16.4   ~ 56 1
32 2MASX J08160416-0736000 BLL 08 16 04.1918724816 -07 35 59.734261968     16.10     ~ 23 0
33 BWE 0826+0908 Bla 08 29 30.3184983324 +08 58 21.292947420     21.5     ~ 47 1
34 RX J0847.2+1133 BLL 08 47 12.9303893448 +11 33 50.153057640       16.6   ~ 121 1
35 [VV2006] J085302.7+200422 QSO 08 53 02.5754059104 +20 04 21.706693932   19.62 19.46     ~ 24 1
36 6C 090447+504314 QSO 09 08 16.7994564720 +50 31 05.700522684     20.80     ~ 19 1
37 PSO J141.9456-09.0060 Bla 09 27 46.9446778508 -09 00 21.830998555     21.3 19   ~ 15 1
38 6C 092828+554656 Sy1 09 32 00.0782152656 +55 33 47.378442240   17.81 17.57     ~ 52 1
39 5C 1.33 Bla 09 37 12.32736501 +50 08 52.0975584   19.51 18.94 18.88   ~ 158 1
40 9C J0940+2603 BLL 09 40 14.72278286 +26 03 29.9461593   20.32 19.62 19.21   ~ 53 1
41 7C 1003+3251 QSO 10 06 07.7136853488 +32 36 26.110343844   18.3 19.05 18.3   ~ 45 1
42 [VV2006] J100637.6+050954 Bla 10 06 37.61073133 +05 09 53.9787336     21.70 20.1   ~ 28 1
43 LAMOST J101051.62-020225.9 QSO 10 10 51.6262860240 -02 02 25.920376908   19.1   19.2   ~ 10 0
44 [VV98] J101130.2-042328 Bla 10 11 30.2399259480 -04 23 27.705939108   18.2 18.5 18.1   ~ 33 1
45 [VV98] J102556.4+125349 Bla 10 25 56.28536956 +12 53 49.0219212   19.5 18.5 18.96   ~ 60 1
46 8C 1022+680 Bla 10 26 33.8428529208 +67 46 12.114188364   15.0   18.1   ~ 23 1
47 SDSS J102834.03-023659.6 Bla 10 28 34.0418775360 -02 36 59.725248372   19.78 19.05 19.6   ~ 60 1
48 [VV2006] J102840.4-033618 QSO 10 28 40.3203809304 -03 36 19.221156108     19.10     ~ 9 1
49 [VV98] J103206.3-140020 Bla 10 32 06.22678007 -14 00 19.4685695     18.80 18   ~ 33 1
50 4C 62.15 Bla 11 01 53.4510001968 +62 41 50.602765344     17.90 17.9   ~ 64 1
51 [VV2006] J110519.2-181312 Bla 11 05 19.1130524328 -18 13 13.490914512     18.50 19.1   ~ 10 0
52 QSO J1116+0829 Bla 11 16 09.97337269 +08 29 22.0323959   20.87 20.34 19.93   ~ 43 1
53 7C 111734.00+591231.00 Sy2 11 20 27.4856013096 +58 56 13.379168292   19.32 18.52     ~ 20 1
54 [VV98] J115024.8+015616 Bla 11 50 24.8002598328 +01 56 20.346566352   20.48 20.37 19.3   ~ 48 1
55 ICRF J120416.6-071009 BLL 12 04 16.6649997552 -07 10 09.006821616   18.01 18.00 14.6   ~ 84 1
56 [VV2006] J120619.7+282253 Bla 12 06 19.6448265096 +28 22 54.637344228   19.47 19.25 19.2   ~ 36 1
57 7C 121031.9+330411 Bla 12 13 03.8083387296 +32 47 36.726587196   19.46 19.27     ~ 51 1
58 SDSS J121314.82+144400.6 Bla 12 13 14.8178973480 +14 44 00.570477624   19.95 19.63 19.8   ~ 27 0
59 7C 121437.50+294208.00 Bla 12 17 08.0319 +29 25 33.231   19.60 19.21 20.8   ~ 16 1
60 BWE 1220+2951 Bla 12 22 43.1998972896 +29 34 41.520929196   19.02 18.78 19   ~ 34 1
61 [VV2006] J122354.7+065002 Bla 12 23 54.62431532 +06 50 02.5721111   20.23 19.68 20   ~ 37 1
62 4C 26.37 rG 12 24 33.285 +26 13 15.09     21.3     ~ 31 2
63 [VV2006] J122531.1+071552 QSO 12 25 31.2372319944 +07 15 53.316591732   20.24 19.65     ~ 11 1
64 ICRF J122934.2+271156 Sy1 12 29 34.24797092 +27 11 56.3777623     13.1     ~ 23 1
65 7C 122915.40+290414.00 BLL 12 31 43.5724342752 +28 47 49.770870684   17.90 17.38     ~ 99 2
66 2MASX J13111781-0521201 BLL 13 11 17.8333730904 -05 21 19.956414348     18.70     ~ 13 1
67 7C 131254.10+285602.00 Bla 13 15 13.4927 +28 40 53.680   20.05 19.84 19.8   ~ 29 1
68 [VV98] J132026.8+014037 Bla 13 20 26.79487794 +01 40 36.8115680   21.01 20.28 20.5   ~ 54 1
69 6C 132700+502509 QSO 13 29 05.80271152 +50 09 26.4008812     18.10     ~ 49 1
70 3C 286 Sy1 13 31 08.2883506368 +30 30 32.960091564   17.51 17.25     ~ 4558 2
71 7C 133039.60+473739.00 Bla 13 32 45.24642464 +47 22 22.6677558   18.34 17.94 18.57   ~ 147 1
72 [VV2006] J133714.9-131917 Bla 13 37 14.7776782368 -13 19 18.371726652     19.80 19.1   ~ 11 0
73 ICRF J135938.0+401138 Bla 13 59 38.09426177 +40 11 38.2506777     19.2 17.00   ~ 69 1
74 [VV2006] J140048.4+042530 Bla 14 00 48.44410712 +04 25 30.8805468   21.07 20.69 20.6   ~ 34 1
75 6C 140206+342744 BLL 14 04 16.8232088688 +34 13 17.174807400   19.51 19.23     ~ 31 1
76 [VV2006] J140653.9+343336 Bla 14 06 53.8472771496 +34 33 37.310323356   19.17 18.84 18.02   ~ 82 1
77 [VV98] J141628.6+124214 Bla 14 16 28.6564478472 +12 42 13.572936432   17.72 17.54 17.2   ~ 63 1
78 [VV2006] J141730.4+264456 Bla 14 17 30.4135983936 +26 44 57.044918904   22.27 21.55 20.1   ~ 16 1
79 [VV2006] J141909.3+060329 QSO 14 19 09.2621833176 +06 03 28.507487688   20.15 19.94     ~ 26 1
80 LEDA 2827947 BLL 14 20 40.8687973128 +06 50 59.514502020   20.08 19.20     ~ 30 1
81 6C 142128+484348 QSO 14 23 17.9969979000 +48 30 15.737903784   18.80 18.56     ~ 33 1
82 [VV2006] J142758.8+324739 QSO 14 27 58.7263614216 +32 47 41.472982176   18.50 18.43 18.37 17.67 ~ 45 1
83 6C 144043+524847 QSO 14 42 19.5309 +52 36 20.855   20.52 20.58     ~ 13 1
84 4C 62.23 QSO 15 07 57.3071487624 +62 13 34.158186444   19.44 19.13     ~ 33 1
85 NVSS J153909-065843 BLL 15 39 09.6684080712 -06 58 43.220227548     20.00 19.6   ~ 15 0
86 [VV2006] J154343.8+184720 Bla 15 43 43.8039630528 +18 47 19.767814188   19.78 19.24 19.5   ~ 30 1
87 [VV2006] J160605.9+203208 Bla 16 06 05.81937 +20 32 08.3680     18.30     ~ 19 1
88 6C 162542+581549 QSO 16 26 37.2369813840 +58 09 17.667263052   16.2 16.37 16.5   ~ 39 1
89 87GB 162737.7+212336 QSO 16 29 47.541 +21 17 18.12   19.67 19.31     ~ 11 1
90 6C 164650+410912 Bla 16 48 29.25803616 +41 04 05.5525848   19.18 18.90 19   ~ 67 1
91 [VV98] J165639.7+532149 Bla 16 56 39.6301 +53 21 48.760     19.20 19.4   ~ 38 1
92 6C 165609+601648 Bla 16 56 48.24496246 +60 12 16.4345142     19.00     ~ 81 1
93 7C 172024.60+310607.00 BLL 17 22 18.9606539616 +31 03 23.897445804   20.90 20.19     ~ 12 1
94 87GB 180232.0+175507 BLL 18 04 42.5470057440 +17 55 58.872827712       17.6   ~ 16 1
95 6C 183958+544904 BLL 18 40 57.37670714 +54 52 15.9106743     19.40 19.5   ~ 33 1
96 [VV2006] J210949.9-133246 Bla 21 09 49.7753730264 -13 32 45.602888100     19.30 17.2   ~ 16 1
97 [VV2006] J215407.5-150130 Bla 21 54 07.4387465928 -15 01 31.470391560     18 16.3   ~ 28 1
98 [VV2006] J215920.2-150037 Bla 21 59 20.1837478416 -15 00 36.271653084     18.20     ~ 10 0
99 2MASS J22394683-0631505 BLL 22 39 46.8373060992 -06 31 50.586378744           ~ 11 0
100 3C 455.0 QSO 22 55 03.8909253126 +13 13 33.940584742   19.535 19.590 19.190   ~ 197 1
101 [VV2006] J232038.0+003138 Bla 23 20 37.9916312304 +00 31 39.713608848   20.03 19.70 18.8   ~ 44 1
102 [VV98] J232202.6+211356 Bla 23 22 02.6049131232 +21 13 56.539815600     16.96 17   ~ 28 2
103 [VV2006] J232905.8+083414 Bla 23 29 05.78674920 +08 34 15.8542268     20.50 19.01   ~ 44 1
104 [VV98] J233316.7-013107 Bla 23 33 16.68837896 -01 31 07.3862694     19.60 18.7   ~ 37 1
105 LAMOST J234738.15+085246.4 Sy1 23 47 38.1538043712 +08 52 46.412302656   18 17.10     ~ 23 1

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