2014ApJ...792...33G

Query : 2014ApJ...792...33G

2014ApJ...792...33G - Astrophys. J., 792, 33 (2014/September-1)

The optical variability of SDSS quasars from multi-epoch spectroscopy. I. Results from 60 quasars with ≥ six-epoch spectra.

GUO H. and GU M.

Abstract (from CDS):

In a sample of 60 quasars selected from the Sloan Digital Sky Survey with at least six-epoch spectroscopy, we investigate the variability of emission lines and continuum luminosity at various aspects. A strong anti-correlation between the variability and continuum luminosity at 2500 Å is found for the sample, which is consistent with previous works. In individual sources, we find that half of the sample objects follow the trend of being bluer when brighter, while the remaining half follow the redder-when-brighter (RWB) trend. Although the mechanism for RWB is unclear, the effects of host galaxy contribution due to seeing variations cannot be completely ruled out. As expected from the photoionization model, the positive correlations between the broad emission line and continuum luminosity are found in most individual sources, as well as for the whole sample. We confirm the Baldwin effect in most individual objects and the whole sample, while a negative Baldwin effect is also found in several quasars, which can be at least partly (if not all) due to the host galaxy contamination. We find positive correlations between the broad emission line luminosity and line width in most individual quasars, as well as the whole sample, implying a line base that is more variable than the line core.

Abstract Copyright: ∼

Journal keyword(s): galaxies: active - quasars: general - techniques: spectroscopic

Simbad objects: 61

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Number of rows : 61
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 [VV2006] J021754.8+000234 QSO 02 17 54.8092066872 +00 02 34.108280916   19.44 19.25     ~ 27 0
2 [VV2006] J021953.0-004434 QSO 02 19 53.0397681288 -00 44 34.258789716   19.26 19.09     ~ 29 0
3 [VV2006] J022111.9+010548 QSO 02 21 11.8967068344 +01 05 48.852309156   18.73 18.40     ~ 34 0
4 [VV2006] J022143.2-001803 QSO 02 21 43.1909100984 -00 18 03.886809300   19.20 18.98     ~ 31 0
5 [VV2006] J022157.8+000043 QSO 02 21 57.8118688248 +00 00 42.562177560   19.20 18.84     ~ 31 0
6 [VV2006] J022214.4-001745 QSO 02 22 14.3870108664 -00 17 45.368318508   20.09 19.97     ~ 28 0
7 [VV2006] J022230.3+001844 QSO 02 22 30.2891395440 +00 18 44.636549256   19.91 19.67     ~ 26 0
8 [VV2006] J022246.4-004836 QSO 02 22 46.4675625432 -00 48 36.186553656   17.97 17.75     ~ 31 0
9 [VV2006] J022321.4-000733 QSO 02 23 21.3861148824 -00 07 33.717936108   19.61 19.38     ~ 32 0
10 2SLAQ J022331.90-001605.5 Sy1 02 23 31.9048907688 -00 16 05.518923672   19.23 19.06     ~ 29 0
11 [VV2006] J022335.9+002351 QSO 02 23 35.8458452280 +00 23 51.886353444   19.68 19.44     ~ 31 0
12 [VV2006] J022400.2-001241 QSO 02 24 00.2400750336 -00 12 41.326958628   20.26 20.12     ~ 25 0
13 [VV2006] J022430.2-004130 QSO 02 24 30.1682100480 -00 41 31.223272812   19.68 19.52     ~ 34 0
14 [VV2006] J022518.3-001331 QSO 02 25 18.3591427776 -00 13 32.291753268   20.74 20.04     ~ 26 0
15 QSO J0225+0054 QSO 02 25 54.8563961016 +00 54 51.953062608   19.18 18.92     ~ 42 0
16 [VV2006] J022556.3+001345 QSO 02 25 56.3426898888 +00 13 45.301817352   18.0 18.77 18.4   ~ 29 0
17 [VV2006] J022826.7-003802 QSO 02 28 26.6912224632 -00 38 02.375820600   18.81 18.54     ~ 33 0
18 [VV2006] J022844.1+000218 QSO 02 28 44.0931556344 +00 02 17.050602840   18.67 18.35     ~ 43 0
19 [VV2006] J025754.1+000507 QSO 02 57 54.1933206456 +00 05 06.469552032   20.19 19.86     ~ 33 0
20 US 3621 Bla 03 04 58.9750802088 +00 02 35.750540328   18.23 18.06 18.4   ~ 56 1
21 [VV2006] J030551.2-000557 QSO 03 05 51.1556179056 -00 05 57.281488656   19.47 19.16     ~ 30 0
22 PB 7009 Sy1 03 06 39.5824276346 +00 03 43.161393991   18.00 17.54     ~ 79 0
23 US 3669 QSO 03 07 19.9178889048 +00 45 38.853069768   19.86 19.54     ~ 33 0
24 2MASS J03074597+0008336 QSO 03 07 45.9576570480 +00 08 33.410479020   19.99 19.61     ~ 27 0
25 [VV2006] J030815.8+010721 QSO 03 08 15.8406839712 +01 07 21.460933488   19.72 19.38     ~ 27 0
26 [VV2006] J030905.4+005808 QSO 03 09 05.3800698576 +00 58 08.981806152   20.11 19.79     ~ 24 0
27 [VV2006] J030907.5+002419 QSO 03 09 07.4933082888 +00 24 19.109783160   19.76 19.38     ~ 26 0
28 [VV2006] J030911.6+002359 QSO 03 09 11.6456043696 +00 23 58.859993652   17.41 17.24     ~ 36 0
29 LBQS 0307-0015 QSO 03 09 39.4551202200 -00 03 39.258469980   17.78 17.55     ~ 48 0
30 LBQS 0307-0058 QSO 03 10 03.0134952144 -00 46 45.731656632   18.44 18.24     ~ 43 0
31 LBQS 0307+0049 QSO 03 10 19.9546607520 +01 01 11.532540036   18.36 18.11     ~ 35 0
32 2SLAQ J031022.10+004130.0 Sy1 03 10 22.1057130960 +00 41 30.023370240   19.40 19.15     ~ 26 0
33 LEDA 138607 Sy1 03 10 27.8271759768 -00 49 50.801124072   16.59 16.33 15.3   ~ 67 0
34 [VV2006] J031028.9-005325 QSO 03 10 28.8752382216 -00 53 26.210604660   18.97 18.71     ~ 29 0
35 [VV2006] J031031.0+000518 QSO 03 10 30.9011629488 +00 05 17.657549664   19.92 19.58     ~ 24 0
36 [VV2006] J031036.9+005521 QSO 03 10 36.8491920960 +00 55 21.716977548   21.56 20.50     ~ 37 0
37 [VV2006] J031037.6+004008 QSO 03 10 37.6313478840 +00 40 09.013759536   19.89 19.43     ~ 26 0
38 [VV2006] J031118.5+002437 QSO 03 11 18.5203130856 +00 24 37.059344784   18.72 18.43     ~ 29 0
39 [VV2006] J031127.5+005356 QSO 03 11 27.5551546008 +00 53 57.374179368   19.82 19.63     ~ 30 0
40 [VV2006] J031129.3+005638 QSO 03 11 29.2958288688 +00 56 38.635714464   19.74 19.52     ~ 28 0
41 [VV2006] J031131.4-002127 QSO 03 11 31.4127108768 -00 21 27.487832652   19.34 19.00     ~ 30 0
42 2MASS J03114200-0059188 Sy1 03 11 42.0181434432 -00 59 18.923165916   20.16 19.45     ~ 28 0
43 [VV2006] J031156.5-004156 QSO 03 11 56.4492409824 -00 41 57.002823420   19.95 19.50     ~ 27 0
44 [VV2006] J031226.1-003709 QSO 03 12 26.1234856512 -00 37 09.015921624   18.99 18.82     ~ 31 0
45 [VV2006] J031227.2-003446 QSO 03 12 27.1334182056 -00 34 46.221913812   19.72 19.49     ~ 34 0
46 [VV2006] J031237.5+004511 QSO 03 12 37.5730714104 +00 45 11.341950192   19.85 19.65     ~ 28 0
47 [VV2006] J031246.4-005024 QSO 03 12 46.4499661896 -00 50 24.702077184   18.90 18.72     ~ 27 0
48 [VV2006] J031307.9-003222 QSO 03 13 07.9177059096 -00 32 21.982873128   19.51 19.25     ~ 26 0
49 [VV2006] J031318.7+003623 QSO 03 13 18.6667466136 +00 36 23.906904660   19.03 18.60     ~ 35 0
50 2SLAQ J031343.07-001623.3 QSO 03 13 43.0814158680 -00 16 23.434693896   19.83 19.57     ~ 26 0
51 [VV2006] J031348.3-010432 QSO 03 13 48.3405860400 -01 04 33.092107356   19.60 19.38     ~ 27 0
52 [VV2006] J031404.4-003947 QSO 03 14 04.4433422688 -00 39 47.338760196   19.23 18.94     ~ 29 0
53 2MASS J03142746-0111523 Sy1 03 14 27.4623857040 -01 11 52.323386712   18.10 17.98     ~ 36 0
54 [VV2006] J031439.1-000249 QSO 03 14 39.0906830088 -00 02 49.301468592   18.2 18.97 18.9   ~ 28 0
55 [VV2006] J031444.5-005700 QSO 03 14 44.5488933576 -00 57 01.179953316   18.95 18.71     ~ 29 0
56 [VV2006] J031452.1+001345 QSO 03 14 52.0691801712 +00 13 46.362023652   20.53 19.94     ~ 28 0
57 [VV2006] J031645.6-000553 QSO 03 16 45.5476081152 -00 05 53.344152312   20.30 19.78     ~ 24 0
58 2SLAQ J032142.83-003225.7 Sy1 03 21 42.8375117736 -00 32 25.791821700   19.30 19.08     ~ 26 0
59 [VV2006] J032205.1+001200 QSO 03 22 05.0504499384 +00 12 01.459850904   17.45 17.36     ~ 32 0
60 [VV2006] J032933.9-004801 QSO 03 29 33.9759756360 -00 48 01.124462808   19.47 19.19     ~ 33 0
61 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1

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