2011A&A...528A..95G


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.17CEST23:45:15

2011A&A...528A..95G - Astronomy and Astrophysics, volume 528A, 95-95 (2011/4-1)

The optical variability of flat-spectrum radio quasars in the SDSS stripe 82 region.

GU M.-F. and AI Y.L.

Abstract (from CDS):

Although a bluer-when-brighter trend is commonly observed in blazars, the opposite trend of redder-when-brighter has also been found in some blazars. We investigate the frequency of the redder-when-brighter trend in flat-spectrum radio quasars (FSRQs). We investigate the optical variability of 29 FSRQs in the SDSS Stripe 82 region using SDSS DR7 released multi-epoch data covering about nine years. We determined the spectral index by fitting a powerlaw to SDSS ugriz photometric data, and explored the relationship between the spectral index and source brightness. For all FSRQs studied, we detect variations in r band flux of overall amplitude between 0.24 mag and 3.46 mag in different sources. Fourteen of 29 FSRQs display a bluer-when-brighter trend. However, only one source exhibits a redder-when-brighter trend, which implies that this behavior is rare in our FSRQ sample. In this source, the thermal emission from the accretion disk may be responsible for the redder-when-brighter trend.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: general - galaxies: photometry

Simbad objects: 50

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Number of rows : 50

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 [VV2006] J001130.4+005751 QSO 00 11 30.4037989341 +00 57 51.878870838   18.55 18.16 20.06   ~ 68 0
2 QSO B0013-005 QSO 00 16 11.08855479 -00 15 12.4453413   20.44 19.98 19.72   ~ 117 1
3 2SLAQ J002509.66-004030.9 QSO 00 25 09.6615720853 -00 40 31.002735137   19.60 19.40     ~ 15 0
4 [VV2006] J003443.9-005413 QSO 00 34 43.9213717729 -00 54 13.030699534   19.57 19.52     ~ 21 0
5 SDSS J003512.90+010430.6 QSO 00 35 12.9088458325 +01 04 30.663536906   20.76 20.52     ~ 13 0
6 QSO B0041+001 QSO 00 43 32.7099641252 +00 24 59.851105633   19.52 19.26 19.3   ~ 33 1
7 QSO B0045-000 QSO 00 48 19.1212819316 +00 14 57.140639790   20.23 20.00     ~ 28 1
8 LBQS 0049+0019A QSO 00 52 05.56900 +00 35 38.1461   16.54 16.22     ~ 36 0
9 QSO B0054-0040 QSO 00 57 17.0021382288 -00 24 33.180753162   19.38 19.16 19.2   ~ 67 1
10 [VV2006] J011129.9+003431 QSO 01 11 29.9467 +00 34 31.433   18.8 19.25 18.4   ~ 25 0
11 87GB 012127.8+001909 QSO 01 24 01.7627210375 +00 35 00.883131701   20.98 20.74     ~ 20 1
12 4C -00.10 QSO 01 25 17.1506185206 -00 18 28.911983155   18.73 18.60 18.4   ~ 67 1
13 QSO J0125-0005 QSO 01 25 28.8436590768 -00 05 55.930666802   16.92 16.64 16.30   ~ 248 1
14 2SLAQ J012753.69+002516.4 QSO 01 27 53.7021073063 +00 25 16.452130188   20.72 20.61 20.7   ~ 16 0
15 ICRF J015243.1+002039 QSO 01 52 43.14999445 +00 20 39.7109736   20.98 20.72     ~ 28 1
16 [VV2006] J015454.3-000723 QSO 01 54 54.3652002769 -00 07 23.245986163   19.73 19.53     ~ 28 0
17 SDSS J015832.52-004238.1 QSO 01 58 32.5198457619 -00 42 38.253790884   19.45 19.34     ~ 22 1
18 [VV2006] J021728.6-005227 QSO 02 17 28.6366039302 -00 52 27.196899563   20.36 20.08     ~ 27 1
19 QSO B0222+000 BLL 02 25 08.0764804578 +00 17 07.237117620   18.93 18.59     ~ 41 1
20 [VV2006] J023105.6+000845 QSO 02 31 05.5965789834 +00 08 43.651517673   20.00 19.74     ~ 24 0
21 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1366 2
22 2SLAQ J025515.09+003740.5 QSO 02 55 15.096 +00 37 40.53   20.53 20.15     ~ 15 0
23 QSO B0420-0127 QSO 04 23 15.80072776 -01 20 33.0654034   17.50 17.00 16.28   ~ 1019 2
24 8C 0716+714 BLL 07 21 53.4484901266 +71 20 36.362058601   15.5 14.17 14.27   ~ 1100 1
25 QSO J0738+1742 BLL 07 38 07.39374766 +17 42 18.9982302   16.76 16.22 15.78   ~ 887 1
26 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 613 1
27 3FGL J0948.8+0021 Sy1 09 48 57.3204380262 +00 22 25.561362007   18.85 18.61 18.17   ~ 231 2
28 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 781 1
29 QSO J1512-0906 QSO 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1119 1
30 QSO B1622-297 QSO 16 26 06.02083867 -29 51 26.9710860   18.41 20.5 17.6   ~ 353 0
31 3C 345 QSO 16 42 58.8100340220 +39 48 36.999540578   16.81 16.59 16.84   ~ 1532 2
32 QSO B2134+0028 QSO 21 36 38.5862648232 +00 41 54.210724774   17.30 17.08 17.02   ~ 515 2
33 87GB 215114.0+001655 QSO 21 53 49.7 +00 31 19   22.04 21.20     ~ 13 1
34 2SLAQ J221001.81-001309.6 QSO 22 10 01.8182219014 -00 13 09.717187822   20.66 20.27     ~ 15 0
35 [VV2006] J221806.7+005223 QSO 22 18 06.6768953836 +00 52 23.617860973   18.06 17.78     ~ 25 0
36 2SLAQ J222235.85+001536.3 QSO 22 22 35.8497973877 +00 15 36.318211258   20.74 20.35     ~ 17 0
37 3C 446 BLL 22 25 47.25929302 -04 57 01.3907581   18.83 18.39 16.3   ~ 752 1
38 4C 00.81 QSO 22 26 46.5371978789 +00 52 11.337749582   21.64 20.97 19.62   ~ 60 1
39 2SLAQ J222713.23-005041.4 QSO 22 27 13.2307247537 -00 50 41.556179958   21.12 20.66     ~ 13 0
40 [VV2006] J222744.6+003451 QSO 22 27 44.5842069458 +00 34 50.856468739   20.46 20.20     ~ 20 0
41 4C 11.69 QSO 22 32 36.40890517 +11 43 50.9040717   17.75 17.33     ~ 921 2
42 2SLAQ J224146.36+001608.0 Sy1 22 41 46.3779882488 +00 16 08.016170843   20.64 20.38     ~ 14 0
43 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2439 2
44 [VV2006] J231222.4-010925 QSO 23 12 22.3609 -01 09 24.714   21.68 21.01     ~ 23 1
45 [VV2006] J232038.0+003138 QSO 23 20 37.9922748422 +00 31 39.731805360   20.03 19.70 18.8   ~ 36 1
46 [VV2010] J232659.1-002352 QSO 23 26 59.084 -00 23 52.39   21.41 21.21     ~ 14 0
47 [VV2006] J232734.7+002234 QSO 23 27 34.7386252254 +00 22 34.063571374   19.15 18.81 18.24 18.36 ~ 29 1
48 QSO J2340-0053 QSO 23 40 23.6702895509 -00 53 26.997605159   18.26 17.93     ~ 74 0
49 LBQS 2351-0036 QSO 23 54 09.1765986021 -00 19 47.951893289   18.80 18.48 18.1   ~ 95 1
50 [VV96] J235936.8-003112 QSO 23 59 36.82109 -00 31 12.8619   20.63 20.22     ~ 21 0

    Equat.    Gal    SGal    Ecl

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2019.10.17-23:45:15

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