2014A&A...563A..57S


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:38:17

2014A&A...563A..57S - Astronomy and Astrophysics, volume 563A, 57-57 (2014/3-1)

Long-term variability of AGN at hard X-rays.

SOLDI S., BECKMANN V., BAUMGARTNER W.H., PONTI G., SHRADER C.R., LUBINSKI P., KRIMM H.A., MATTANA F. and TUELLER J.

Abstract (from CDS):

Variability at all observed wavelengths is a distinctive property of active galactic nuclei (AGN). Hard X-rays provide us with a view of the innermost regions of AGN, mostly unbiased by absorption along the line of sight. Characterizing the intrinsic hard X-ray variability of a large AGN sample and comparing it to the results obtained at lower X-ray energies can significantly contribute to our understanding of the mechanisms underlying the high-energy radiation. Swift/BAT provides us with the unique opportunity to follow, on time scales of days to years and with regular sampling, the 14-195keV emission of the largest AGN sample available up to date for this kind of investigation. As a continuation of an early work using the first 9 months of BAT data, we study the amplitude of the variations and their dependence on subclass and on energy, for a sample of 110 radio quiet and radio loud AGN selected from the BAT 58-month survey. About 80% of the AGN in the sample are found to exhibit significant variability on month-to-year time scales. In particular, radio loud sources are the most variable, and Seyfert 1.5-2 galaxies are slightly more variable than Seyfert 1, while absorbed and unabsorbed objects show similar timing properties. The amplitude of the variations and their energy dependence are incompatible with variability being driven at hard X-rays by changes in the absorption column density. In general, the variations in the 14-24 and 35-100keV bands are correlated well, suggesting a common origin to the variability across the BAT energy band. However, radio quiet AGN display on average 10% larger variations at 14-24keV than at 35-100keV, and a softer-when-brighter behavior for most of the Seyfert galaxies with detectable spectral variability on a time scale of a month. In addition, sources with harder spectra are found to be more variable than softer ones, unlike what it is observed below 10keV. These properties are generally consistent with a variable, in flux and shape, power law continuum, pivoting at energies >50keV, to which a constant reflection component is superposed. When the same time scales are considered, the timing properties of AGN at hard X-rays are comparable to those at lower energies, with at least some of the differences possibly ascribable to components contributing differently in the two energy domains (e.g., reflection, absorption).

Abstract Copyright:

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

VizieR on-line data: <Available at CDS (J/A+A/563/A57): table2.dat>

CDS comments: (F) table2

Simbad objects: 112

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Number of rows : 112

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0033+595 BLL 00 35 52.554 +59 50 04.19     19.5 17.2   ~ 136 2
2 NGC 235 Sy2 00 42 52.8103448958 -23 32 27.712826044   14.24   12.63   ~ 118 2
3 NGC 262 Sy2 00 48 47.1414900 +31 57 25.083955 14.04 13.90 13.06 8.53   ~ 673 3
4 ESO 113-45 Sy1 01 23 45.7630391439 -58 48 20.811630442   14.08 13.83 13.34   ~ 771 0
5 NGC 526 Sy1 01 23 54.3778199024 -35 03 55.695504754   14.76 14.60 13.46   ~ 296 1
6 NGC 612 Sy2 01 33 57.751 -36 29 35.80   13.90 13.15 12.33   ~ 194 0
7 ESO 297-18 Sy2 01 38 37.141 -40 00 41.23   14.28   12.96   ~ 73 1
8 NGC 788 Sy2 02 01 06.4622976350 -06 48 57.146217363   13.71 12.76 11.79   ~ 212 0
9 2MASS J02093740+5226396 Sy1 02 09 37.4068484247 +52 26 39.659946835     14.9     ~ 40 0
10 NGC 931 Sy1 02 28 14.4690482478 +31 18 41.467674278   15.71 14.74     ~ 353 0
11 ICRF J024457.6+622806 Sy1 02 44 57.6968650655 +62 28 06.517178768   12.15 12.19     ~ 253 1
12 NGC 1142 Sy2 02 55 12.229 -00 11 00.77   15.42 14.41     ~ 293 1
13 3C 84 Sy2 03 19 48.1597607660 +41 30 42.114155434   13.10 12.48 11.09   ~ 3545 3
14 NGC 1365 Sy1 03 33 36.458 -36 08 26.37 10.48 10.08 9.63 8.79 9.7 ~ 1524 2
15 ESO 548-81 Sy1 03 42 03.7180399342 -21 14 39.646540303   12.84 13.68 11.57   ~ 101 0
16 3C 111 Sy1 04 18 21.2773655604 +38 01 35.801523843   19.75 18.05     ~ 856 1
17 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1841 2
18 UGC 3142 Sy1 04 43 46.8026038571 +28 58 18.867953273   16.5       ~ 60 0
19 2MASS J04440902+2813004 Sy2 04 44 09.031 +28 13 00.35           ~ 55 0
20 2MASX J04520479+4932446 Sy1 04 52 04.7737592166 +49 32 44.738797125     17.1     ~ 55 0
21 2MAXI J0504-239 Sy2 05 05 45.7299744231 -23 51 14.042655467   16.82 17.0 15.63   ~ 63 0
22 2E 1228 Sy1 05 10 45.5390847005 +16 29 58.176227369   15.6 15.774     ~ 90 1
23 Mrk 1095 Sy1 05 16 11.4093760763 -00 08 59.158774578   14.30 13.92     ~ 776 1
24 ESO 362-18 Sy2 05 19 35.8124008506 -32 39 27.923759175   13.81 13.37 12.73   ~ 195 0
25 NAME Pictor A Sy1 05 19 49.7230919028 -45 46 43.855209977   15.73 15.77 14.85   ~ 555 1
26 QSO B0521-365 BLL 05 22 57.9839686440 -36 27 30.847737786   15.26 14.62 14.48   ~ 712 2
27 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5596 4
28 QSO B0548-322 BLL 05 50 40.5706739558 -32 16 16.488658537   16.07 15.5     ~ 366 1
29 NGC 2110 Sy2 05 52 11.3760694860 -07 27 22.489931610   14.77 13.51 11.86   ~ 584 1
30 UGC 3374 Sy1 05 54 53.6085733702 +46 26 21.625853190   15.37 14.62     ~ 466 2
31 2MASX J05580206-3820043 Sy1 05 58 02.0566732230 -38 20 04.453517461   16.05 14.98 11.6   ~ 203 1
32 RX J0602.1+2828 Sy1 06 02 10.4708588399 +28 28 19.409846103   15.0       ~ 56 0
33 Mrk 3 Sy2 06 15 36.458 +71 02 15.24 14.21 14.03 12.97     ~ 843 3
34 IC 450 Sy1 06 52 12.32333 +74 25 37.2376   15.16 14.19     ~ 499 1
35 Mrk 79 Sy1 07 42 32.8212778143 +49 48 34.787882233   14.74 14.27     ~ 633 1
36 2MASS J07594181-3843560 Sy1 07 59 41.8249712970 -38 43 56.041977918           ~ 51 0
37 Mrk 1210 Sy2 08 04 05.8618852704 +05 06 49.810938210   14.55 13.7     ~ 260 2
38 MCG-01-22-006 Sy2 08 23 01.100 -04 56 05.39   15.62   14.36   ~ 43 0
39 4C 71.07 QSO 08 41 24.36526906 +70 53 42.1730054     16.5 16.8   ~ 695 1
40 MCG-01-24-012 Sy2 09 20 46.2623810226 -08 03 21.935252354   17.86 17.34     ~ 114 0
41 MCG+04-22-042 Sy1 09 23 43.0006235873 +22 54 32.569231798   16.23 15.82     ~ 102 0
42 Mrk 110 Sy1 09 25 12.8479868736 +52 17 10.386808297   16.82 16.41     ~ 510 0
43 ESO 434-40 Sy2 09 47 40.1345889569 -30 56 55.959492708   14.10 13.69 12.44   ~ 487 0
44 NGC 3081 Sy2 09 59 29.5436045645 -22 49 34.748021329   13.06 13.55 11.67 12.1 ~ 412 0
45 NGC 3227 GiP 10 23 30.57 +19 51 54.3   12.61 11.79     ~ 1533 2
46 NGC 3281 Sy2 10 31 52.086 -34 51 13.40   12.62 14.02 11.17   ~ 315 0
47 Mrk 421 BLL 11 04 27.3139210166 +38 12 31.798324828   13.50 12.90 8.31   ~ 2383 1
48 NGC 3516 Sy1 11 06 47.4596406816 +72 34 07.189563769   13.12 12.40     ~ 1418 0
49 NGC 3783 Sy1 11 39 01.7095761008 -37 44 19.008597647   12.46 13.43 11.33 12.1 ~ 1487 0
50 UGC 6728 Sy1 11 45 15.9440557865 +79 40 53.378480801   14.8 15.2     ~ 82 0
51 2MASX J11454045-1827149 Sy1 11 45 40.4653921674 -18 27 14.962362659   14.63 14.29 10.5   ~ 126 0
52 2MASX J12024767-5350082 Sy2 12 02 47.6225970101 -53 50 07.801488651   17.3       ~ 62 0
53 NGC 4151 Sy1 12 10 32.5771747733 +39 24 21.057727323   12.18 11.48     ~ 3380 2
54 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1184 2
55 3C 273 BLL 12 29 06.6996828061 +02 03 08.598846466   13.05 14.830 14.11   ~ 5320 1
56 NGC 4507 Sy2 12 35 36.6328010225 -39 54 33.661858548   12.95 13.54 11.70 12.4 ~ 438 0
57 ESO 506-27 Sy2 12 38 54.5931097449 -27 18 27.998858037   14.59   12.87   ~ 79 0
58 NGC 4593 Sy1 12 39 39.4435521178 -05 20 39.035028119   13.95 13.15     ~ 950 0
59 2MASX J12412572-5750038 Sy2 12 41 25.7672413458 -57 50 03.481040498   17.4 16.9     ~ 62 0
60 MCG+09-21-096 Sy1 13 03 59.4958127580 +53 47 29.917551961   17   12.9   ~ 52 0
61 NGC 4945 Sy2 13 05 27.279 -49 28 04.44   9.31 14.40 7.55   ~ 1265 2
62 ESO 323-77 Sy2 13 06 26.1213873662 -40 24 52.594127368   13.58 13.42 12.01   ~ 189 0
63 NAME Centaurus A Sy2 13 25 27.61509104 -43 01 08.8056025   8.18 6.84 6.66   ~ 3999 3
64 ESO 383-35 Sy1 13 35 53.7686909139 -34 17 44.139127597   13.89 13.61 8.9   ~ 1379 0
65 NGC 5252 Sy2 13 38 15.8711551761 +04 32 33.525903711   15.21 14.21     ~ 420 0
66 2MASS J13473599-6037037 Sy1 13 47 36.00 -60 37 03.8         16.77 ~ 83 0
67 IC 4329 BiC 13 49 05.314 -30 17 45.20   11.96 11.54 10.31   ~ 179 2
68 ESO 445-50 Sy1 13 49 19.2607281800 -30 18 34.224136831   13.81 13.66 12.18   ~ 732 0
69 Mrk 279 Sy1 13 53 03.4356451470 +69 18 29.410672989   15.15 14.46     ~ 694 0
70 NAME Circinus Galaxy Sy2 14 13 09.906 -65 20 20.47   10.89 9.84 10.6 10.0 ~ 1008 2
71 NGC 5506 AGN 14 13 14.901 -03 12 27.22   15.25 14.38     ~ 992 0
72 NGC 5548 Sy1 14 17 59.5401093128 +25 08 12.600227883   14.35 13.73     ~ 2393 0
73 ESO 511-30 Sy1 14 19 22.4042606652 -26 38 41.130443100   13.32 14.9 12.27 12.7 ~ 116 0
74 NGC 5728 Sy2 14 42 23.928 -17 15 11.41   14.34 13.40     ~ 498 0
75 Mrk 841 Sy1 15 04 01.1935077982 +10 26 15.778741853   14.50 14.27     ~ 584 0
76 QSO J1512-0906 QSO 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1149 1
77 2MASX J16252587+8529421 Sy1 16 25 25.9395233856 +85 29 41.696078445   16.3       ~ 28 0
78 Mrk 1498 Sy1 16 28 04.0562531526 +51 46 31.483240761   17.0       ~ 83 0
79 2MASX J16481523-3035037 Sy1 16 48 15.238 -30 35 03.78     15.8     ~ 56 0
80 NGC 6240 Sy2 16 52 58.861 +02 24 03.55   14.31 13.37     ~ 1481 2
81 4C 39.49 BLL 16 53 52.21668494 +39 45 36.6089458 14.09 14.15 13.29 8.26   ~ 1914 2
82 2MASS J16560561-5203408 Sy1 16 56 05.6063438033 -52 03 40.853827248           ~ 47 0
83 3FGL J1656.2-3303 QSO 16 56 16.78 -33 02 12.7   18.4 17.8 17.5   ~ 63 0
84 NGC 6300 Sy2 17 16 59.473 -62 49 13.98   10.88 13.08 9.44 10.2 ~ 359 0
85 Granat 1734-292 Sy1 17 37 28.3805413653 -29 08 02.116025925           ~ 117 0
86 IC 4709 Sy2 18 24 19.395 -56 22 09.11   14.41   13.10   ~ 48 0
87 QSO B1830-211 QSO 18 33 39.92 -21 03 39.9     18.70 21   ~ 549 6
88 ICRF J183503.3+324146 Sy1 18 35 03.3896681512 +32 41 46.856048508   16.50 15.39 10.50   ~ 578 1
89 ESO 103-35 Sy2 18 38 20.3207055742 -65 25 39.142872479   14.75 14.53 13.24   ~ 274 0
90 ICRF J184208.9+794617 Sy1 18 42 08.9910523393 +79 46 17.129210139   16.06 15.38     ~ 1207 0
91 ESO 140-43 Sy1 18 44 53.9893682398 -62 21 52.871742814   14.14 14.10 12.94 13.1 ~ 212 0
92 NGC 6814 Sy1 19 42 40.5857305428 -10 19 25.102133898   15.33 14.21 11.7 11.3 ~ 721 0
93 NAME Cyg A Sy2 19 59 28.35645829 +40 44 02.0966496   16.22 15.10     ~ 2113 2
94 QSO B1959+650 BLL 19 59 59.8525497024 +65 08 54.651170114     12.8 11.21   ~ 501 2
95 MCG+04-48-002 Sy2 20 28 35.061 +25 44 00.18   18       ~ 113 1
96 2MAXI J2042+751 Sy1 20 42 37.3081453418 +75 08 02.444858560     14.46 13.80   ~ 210 0
97 Mrk 509 Sy1 20 44 09.7504131334 -10 43 24.724854084   13.35 13.12 10.7   ~ 1129 0
98 IC 5063 Sy2 20 52 02.329 -57 04 07.60   12.92 13.60 11.30   ~ 545 1
99 2MAXI J2115+821 Sy1 21 14 01.1716311384 +82 04 48.338015583           ~ 106 1
100 28P 206 Rad 21 24 38.1 +50 58 58           ~ 7 0
101 IRAS 21262+5643 Sy1 21 27 45.3943647524 +56 56 34.913660916       16.6   ~ 128 0
102 2MAXI J2131-334 Sy1 21 32 02.2033285165 -33 42 53.778237797 15.85 16.92 15.66 15.47   ~ 53 0
103 QSO B2149-306 QSO 21 51 55.52398143 -30 27 53.6979987   17.95 18.0 17.48   ~ 220 1
104 NGC 7172 Sy2 22 02 01.897 -31 52 11.60   12.72 13.61 11.15   ~ 467 1
105 NGC 7213 Sy1 22 09 16.2106632887 -47 10 00.082166299   10.97 12.08 10.50 10.6 ~ 596 0
106 NGC 7314 Sy1 22 35 46.1969940596 -26 03 01.574026329   11.62 13.11 10.61 11.4 ~ 505 0
107 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2506 2
108 NAME MR 2251-178 Sy1 22 54 05.8858021308 -17 34 55.403006841   14.99 14.36 15.12   ~ 376 3
109 NGC 7469 Sy1 23 03 15.674 +08 52 25.28 12.60 13.00 12.34     ~ 1888 3
110 Mrk 926 Sy1 23 04 43.4773393553 -08 41 08.632325890   16.20 15.91 9.4   ~ 400 0
111 NGC 7582 GiP 23 18 23.621 -42 22 14.06 11.62 10.92 10.62     ~ 798 2
112 NGC 7603 Sy1 23 18 56.6537061537 +00 14 37.974617713   14.73 14.01     ~ 356 0

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2020.07.14-19:38:17

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