2010ApJ...722..520A

Query : 2010ApJ...722..520A

2010ApJ...722..520A - Astrophys. J., 722, 520-542 (2010/October-2)

Gamma-ray light curves and variability of bright Fermi-detected blazars.

ABDO A.A., ACKERMANN M., AJELLO M., ANTOLINI E., BALDINI L., BALLET J., BARBIELLINI G., BASTIERI D., BECHTOL K., BELLAZZINI R., BERENJI B., BLANDFORD R.D., BLOOM E.D., BONAMENTE E., BORGLAND A.W., BOUVIER A., BREGEON J., BREZ A., BRIGIDA M., BRUEL P., BUEHLER R., BURNETT T.H., BUSON S., CALIANDRO G.A., CAMERON R.A., CARAVEO P.A., CARRIGAN S., CASANDJIAN J.M., CAVAZZUTI E., CECCHI C., CELIK O., CHEKHTMAN A., CHEUNG C.C., CHIANG J., CIPRINI S., CLAUS R., COHEN-TANUGI J., COMINSKY L.R., CONRAD J., COSTAMANTE L., CUTINI S., DERMER C.D., DE ANGELIS A., DE PALMA F., DO COUTO E SILVA E., DRELL P.S., DUBOIS R., DUMORA D., FARNIER C., FAVUZZI C., FEGAN S.J., FOCKE W.B., FORTIN P., FRAILIS M., FUKAZAWA Y., FUNK S., FUSCO P., GARGANO F., GASPARRINI D., GEHRELS N., GERMANI S., GIEBELS B., GIGLIETTO N., GIOMMI P., GIORDANO F., GLANZMAN T., GODFREY G., GRENIER I.A., GRONDIN M.-H., GROVE J.E., GUIRIEC S., HADASCH D., HAYASHIDA M., HAYS E., HEALEY S.E., HORAN D., HUGHES R.E., ITOH R., JOHANNESSON G., JOHNSON A.S., JOHNSON W.N., KAMAE T., KATAGIRI H., KATAOKA J., KAWAI N., KNODLSEDER J., KUSS M., LANDE J., LARSSON S., LATRONICO L., LEMOINE-GOUMARD M., LONGO F., LOPARCO F., LOTT B., LOVELLETTE M.N., LUBRANO P., MADEJSKI G.M., MAKEEV A., MASSARO E., MAZZIOTTA M.N., McENERY J.E., MICHELSON P.F., MITTHUMSIRI W., MIZUNO T., MOISEEV A.A., MONTE C., MONZANI M.E., MORSELLI A., MOSKALENKO I.V., MUELLER M., MURGIA S., NOLAN P.L., NORRIS J.P., NUSS E., OHNO M., OHSUGI T., OMODEI N., ORLANDO E., ORMES J.F., OZAKI M., PANETTA J.H., PARENT D., PELASSA V., PEPE M., PESCE-ROLLINS M., PIRON F., PORTER T.A., RAINO S., RANDO R., RAZZANO M., REIMER A., REIMER O., RITZ S., RODRIGUEZ A.Y., ROMANI R.W., ROTH M., RYDE F., SADROZINSKI H.F.-W., SANDER A., SCARGLE J.D., SGRO C., SHAW M.S., SMITH P.D., SPANDRE G., SPINELLI P., STARCK J.-L., STRICKMAN M.S., SUSON D.J., TAKAHASHI H., TAKAHASHI T., TANAKA T., THAYER J.B., THAYER J.G., THOMPSON D.J., TIBALDO L., TORRES D.F., TOSTI G., TRAMACERE A., UCHIYAMA Y., USHER T.L., VASILEIOU V., VILCHEZ N., VITALE V., WAITE A.P., WALLACE E., WANG P., WINER B.L., WOOD K.S., YANG Z., YLINEN T. and ZIEGLER M.

Abstract (from CDS):

This paper presents light curves as well as the first systematic characterization of variability of the 106 objects in the high-confidence Fermi Large Area Telescope Bright AGN Sample (LBAS). Weekly light curves of this sample, obtained during the first 11 months of the Fermi survey (2008 August 4-2009 July 4), are tested for variability and their properties are quantified through autocorrelation function and structure function analysis. For the brightest sources, 3 or 4 day binned light curves are extracted in order to determine power density spectra (PDSs) and to fit the temporal structure of major flares. More than 50% of the sources are found to be variable with high significance, where high states do not exceed 1/4 of the total observation range. Variation amplitudes are larger for flat spectrum radio quasars and low/intermediate synchrotron frequency peaked BL Lac objects. Autocorrelation timescales derived from weekly light curves vary from four to a dozen of weeks. Variable sources of the sample have weekly and 3-4 day bin light curves that can be described by 1/f α PDS, and show two kinds of gamma-ray variability: (1) rather constant baseline with sporadic flaring activity characterized by flatter PDS slopes resembling flickering and red noise with occasional intermittence and (2)–measured for a few blazars showing strong activity–complex and structured temporal profiles characterized by long-term memory and steeper PDS slopes, reflecting a random walk underlying mechanism. The average slope of the PDS of the brightest 22 FSRQs and of the 6 brightest BL Lacs is 1.5 and 1.7, respectively. The study of temporal profiles of well-resolved flares observed in the 10 brightest LBAS sources shows that they generally have symmetric profiles and that their total duration vary between 10 and 100 days.
Result. presented here can assist in source class recognition for unidentified sources and can serve as reference for more detailed analysis of the brightest gamma-ray blazars.

Abstract Copyright: ∼

Journal keyword(s): BL Lacertae objects: general - gamma rays: galaxies - gamma rays: general - methods: data analysis - methods: statistical - quasars: general

VizieR on-line data: <Available at CDS (J/ApJ/722/520): table1.dat table3.dat>

Simbad objects: 111

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Number of rows : 111
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 QSO J0017-0512 QSO 00 17 35.8173230832 -05 12 41.768611560       17.60   ~ 111 0
2 KUV 00311-1938 BLL 00 33 34.3800569400 -19 21 33.134193864   16.8 16.3 16.6   ~ 115 0
3 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 460 2
4 QSO B0048-071 BLL 00 51 08.20982093 -06 50 02.2292452   19.0 19.5 19.07   ~ 132 1
5 QSO B0109+224 BLL 01 12 05.8247044608 +22 44 38.785880796   16.00 15.66 15.47   ~ 344 2
6 QSO B0116-219 QSO 01 18 57.26217841 -21 41 30.1402631   19.40 19.0 19.37   ~ 128 1
7 QSO B0118-272 BLL 01 20 31.6628068344 -27 01 24.636341064   15.89 15.56 15.49   ~ 273 1
8 87GB 013336.4+385101 BLL 01 36 32.5983798936 +39 05 59.199517428     15.80 15.5   ~ 128 1
9 6C 013354+473615 Bla 01 36 58.59480326 +47 51 29.1000720     19.50 19.25 15.21 ~ 502 1
10 ICRF J014433.5+270503 BLL 01 44 33.55384903 +27 05 03.1179726       18.6   ~ 88 1
11 QSO B0142-278 QSO 01 45 03.3949333872 -27 33 34.327137060   19.0 19.0 17.43   ~ 129 1
12 QSO B0202-172 QSO 02 04 57.67433267 -17 01 19.8408671   18.18 18 17.19   ~ 243 1
13 QSO B0208-512 BLL 02 10 46.2004407600 -51 01 01.893013392   17.10 16.93 14.82   ~ 449 1
14 QSO J0217+0144 QSO 02 17 48.95475095 +01 44 49.6990271   16.74 16.09 18.51 13.29 ~ 426 1
15 6C 021803+354230 BLL 02 21 05.4920852208 +35 56 13.848581904   20.0 20.0 19.60   ~ 561 3
16 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 887 1
17 QSO B0227-369 QSO 02 29 28.44905708 -36 43 56.8223412     19.0 20.4   ~ 104 0
18 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1553 2
19 QSO B0244-470 QSO 02 46 00.1179456480 -46 51 17.232749496     18.5 17.9   ~ 87 1
20 QSO B0301-243 BLL 03 03 26.5025589984 -24 07 11.426291220   16.55 16.18     ~ 223 1
21 3C 84 Sy2 03 19 48.1599902040 +41 30 42.108850836   13.10 12.48 11.09   ~ 4016 3
22 QSO B0332-403 BLL 03 34 13.65448823 -40 08 25.3979928 18.54 18.35 17.87 17.5   ~ 326 1
23 QSO B0347-211 QSO 03 49 57.82667348 -21 02 47.7416093   20.48 21.10 20.297   ~ 125 1
24 WISEA J042840.41-375619.3 BLL 04 28 40.4241894720 -37 56 19.580735832   18.96 19.0 17.21   ~ 308 1
25 6dFGS gJ044924.7-435009 BLL 04 49 24.6981911928 -43 50 08.960970948 14.95 17.52 15.24 16.27   ~ 167 1
26 QSO J0457-2324 QSO 04 57 03.1791422424 -23 24 52.021129572   18.85 18.5 16.56   ~ 397 1
27 QSO B0502+675 BLL 05 07 56.1631660632 +67 37 24.225299292     17.0 17.2   ~ 181 1
28 QSO B0516-621 BLL 05 16 44.92617055 -62 07 05.3894029 18.50 18.09 17.85 17.46   ~ 125 1
29 QSO J0530+13 Bla 05 30 56.41674741 +13 31 55.1494688     20.00 19.35   ~ 961 1
30 QSO B0537-441 BLL 05 38 50.36155950 -44 05 08.9390233   15.77 16.48 16   ~ 885 2
31 ICRF J065422.0+504223 BLL 06 54 22.09315566 +50 42 23.8731366       0   ~ 99 1
32 7C 065044.10+451813.00 QSO 06 54 23.71365373 +45 14 23.5454988     21.00 19.76   ~ 138 1
33 2MASS J07003124-6610452 BLL 07 00 31.2536435688 -66 10 45.229749384 16.38 15.99 15.89     ~ 77 3
34 ICRF J071243.6+503322 BLL 07 12 43.6836455760 +50 33 22.708727208       18.68   ~ 92 1
35 ICRF J071355.6+193500 QSO 07 13 55.67917496 +19 35 00.4089341       18   ~ 86 3
36 7C 071604.59+331243.00 BLL 07 19 19.41966120 +33 07 09.7087082   17.66 17.05     ~ 110 1
37 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1303 1
38 QSO J0730-116 QSO 07 30 19.11247452 -11 41 12.6006642     20.30 20.3   ~ 300 1
39 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 994 1
40 7C 081451.89+423206.00 BLL 08 18 15.99961476 +42 22 45.4148987   18.88 18.18 17.81   ~ 401 1
41 4C 56.16A Bla 08 24 47.23636459 +55 52 42.6693589   18.52 18.19 17.82   ~ 200 1
42 QSO J0854+2006 BLL 08 54 48.8749846272 +20 06 30.639583620   15.91 15.43 15.56   ~ 2343 1
43 6C 091740+445437 Bla 09 20 58.45848666 +44 41 53.9850947   18.40 18.16 16.55   ~ 380 1
44 ICRF J094857.3+002225 Sy1 09 48 57.32005819 +00 22 25.5596984   18.85 18.61 18.17   ~ 319 2
45 ICRF J095738.1+552257 Sy1 09 57 38.1839604096 +55 22 57.754950636   18.24 17.89     ~ 435 1
46 SDSS J101241.37+243923.4 QSO 10 12 41.3779909824 +24 39 23.394747816   19.77 19.58 19.4   ~ 71 1
47 6C 101157+494057 BLL 10 15 04.1396533776 +49 26 00.706055496   16.56 16.15 14.58   ~ 370 3
48 QSO J1016+0513 QSO 10 16 03.13647602 +05 13 02.3413146   20.26 19.83 20   ~ 146 1
49 ICRF J103351.4+605107 Sy1 10 33 51.4290959304 +60 51 07.334442756   19.31 18.86 20.24   ~ 167 2
50 2E 1050.7+4946 ClG 10 53 44.1 +49 29 56           ~ 58 1
51 7C 105047.29+494553.00 BLL 10 53 44.1256067376 +49 29 55.999047156   18.70 17.76 13.8   ~ 140 2
52 87GB 105148.6+222705 BLL 10 54 30.6250887672 +22 10 54.796074852 17.67 17.39 17.20 17.1   ~ 60 1
53 ICRF J105829.6+013358 Sy1 10 58 29.60520810 +01 33 58.8237454   18.74 18.28 16.68   ~ 780 2
54 ICRF J105837.7+562811 Sy1 10 58 37.7276569824 +56 28 11.207405028   16.80 16.31 14.58   ~ 210 2
55 QSO B1057-797 BLL 10 58 43.30979475 -80 03 54.1598058   19.08   17.31   ~ 194 0
56 Mrk 421 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2682 1
57 QSO J1130-1449 Bla 11 30 07.0523452128 -14 49 27.388021944   17.17 16.90 16 16.97 ~ 710 1
58 QSO B1144-3755 BLL 11 47 01.37071212 -38 12 11.0235229   19.03 16.2 16.72   ~ 301 1
59 Ton 599 Sy1 11 59 31.83391383 +29 14 43.8268224   14.80 14.41 17.652 13.39 ~ 927 1
60 Ton 605 HB* 12 16 53.6748432768 +30 04 08.692883544   16.110 15.98     B 223 0
61 6C 121520+302351 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   ~ 478 1
62 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 875 1
63 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5810 1
64 QSO J1246-2547 QSO 12 46 46.80203943 -25 47 49.2889822   17.65 17.41 16.96 15.5 ~ 285 1
65 6C 125058+531749 BLL 12 53 11.9204702472 +53 01 11.737422696   18.07 17.51 16.4   ~ 127 1
66 3C 279 Bla 12 56 11.16657958 -05 47 21.5251510   18.01 17.75 15.87   ~ 3056 2
67 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 855 1
68 NAME Centaurus A Sy2 13 25 27.61521044 -43 01 08.8050291   8.18 6.84 6.66   ~ 4490 3
69 QSO J1332-0509 Bla 13 32 04.46468002 -05 09 43.3058094     18.5 18.37   ~ 148 1
70 ICRF J133353.7+505735 QSO 13 33 53.7823 +50 57 35.914   20.09 19.71 19.6   ~ 79 1
71 QSO B1352-104 QSO 13 54 46.51868700 -10 41 02.6561979   18.20 18.4     ~ 163 1
72 QSO B1406-076 QSO 14 08 56.48120623 -07 52 26.6665312   20.3 18.4     ~ 315 1
73 7C 1424+2401 BLL 14 27 00.3917926224 +23 48 00.037510776 14.52 14.34 14.95 14.5   ~ 367 1
74 QSO J1457-3539 BLL 14 57 26.71171449 -35 39 09.9716148   17.95 19.50 18.93   ~ 153 1
75 QSO B1502+1041 Bla 15 04 24.97978391 +10 29 39.1985309   18.97 18.56 18.94   ~ 578 1
76 4C -05.64 QSO 15 10 53.59142427 -05 43 07.4175000   17.44 17.21     ~ 231 1
77 QSO J1512-0906 Bla 15 12 50.53293048 -09 05 59.8297908   16.74 16.54     ~ 1320 1
78 QSO B1514-24 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 774 3
79 7C 1520+3154 Bla 15 22 09.99173254 +31 44 14.3819383   20.45 19.89 19.87   ~ 195 1
80 QSO B1542+614 BLL 15 42 56.9436243096 +61 29 55.346749080   16.9 16.25 16.6   ~ 136 1
81 QSO B1551+130 QSO 15 53 32.6978115648 +12 56 51.713513052   18.05 17.65 17.1   ~ 165 1
82 QSO B1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 572 1
83 QSO B1622-253 QSO 16 25 46.89164287 -25 27 38.3268734   21.3 20.6 19.60   ~ 354 1
84 QSO J1626-2951 Bla 16 26 06.02084013 -29 51 26.9712990   18.41 20.5 17.6   ~ 430 1
85 4C 38.41 QSO 16 35 15.49297809 +38 08 04.5005995   18.14 17.97 17.25   ~ 859 1
86 7C 165211.80+395026.00 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2170 2
87 QSO B1717+178 BLL 17 19 13.04848035 +17 45 06.4371847   20.10 19.1 17.28   ~ 225 1
88 4C 09.57 BLL 17 51 32.81857326 +09 39 00.7284066   17.46 16.78 15.57   ~ 949 1
89 8C 1803+784 BLL 18 00 45.6838528560 +78 28 04.018028016   16.4 15.90 15.46   ~ 743 1
90 QSO J1848+3219 QSO 18 48 22.08857099 +32 19 02.6037977       18.79   ~ 138 1
91 [OKM2018] SWIFT J1848.5+6704 Sy1 18 49 16.07228484 +67 05 41.6802599     16.90 17.45   ~ 270 1
92 QSO B1908-202 QSO 19 11 09.65289294 -20 06 55.1090664   18.21   18.14   ~ 285 0
93 [VV2006] J192332.2-210433 QSO 19 23 32.18981392 -21 04 33.3331234   15.32 17.50 16.70   ~ 163 2
94 QSO B1959+650 BLL 19 59 59.8520303688 +65 08 54.652536492     12.8 11.21   ~ 628 2
95 QSO B2005-489 BLL 20 09 25.3903899240 -48 49 53.725051056   15.75 12.81 11.41   ~ 577 2
96 QSO B2022-077 BLL 20 25 40.6602562440 -07 35 52.688047128   18.5       ~ 208 3
97 QSO B2052-474 Bla 20 56 16.35980507 -47 14 47.6277179   18.29 19.1 18.07   ~ 318 1
98 QSO B2136-428 BLL 21 39 24.1733820912 -42 35 20.465859048   16.50 16.2 15.7   ~ 82 0
99 ICRF J214335.5+174348 Sy1 21 43 35.54456275 +17 43 48.7875890   15.91 15.73 15.17   ~ 390 1
100 QSO B2144+093 QSO 21 47 10.16296704 +09 29 46.6722487   18.72 18.54 16.51   ~ 207 1
101 ICRF J215728.8+312701 QSO 21 57 28.82388667 +31 27 01.3517551       20.11   ~ 98 1
102 QSO B2155-304 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1739 1
103 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2263 1
104 QSO B2201+1711 BLL 22 03 26.89368237 +17 25 48.2477620     19.50 14.76   ~ 205 1
105 QSO B2204-54 QSO 22 07 43.73329058 -53 46 33.8199643   18.45 18.0 18.20   ~ 164 1
106 QSO B2227-0848 Bla 22 29 40.08433313 -08 32 54.4355294   17.80 17.41 17.81   ~ 361 1
107 4C 11.69 Bla 22 32 36.40890093 +11 43 50.9040592   17.75 17.33     ~ 1123 2
108 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2855 2
109 ICRF J232517.8+395736 BLL 23 25 17.8701567192 +39 57 36.512873352   17.8 17.80 17.8   ~ 75 1
110 QSO B2325+093 Bla 23 27 33.58055652 +09 40 09.4627185   18.5 19.5 18.26   ~ 188 1
111 QSO J2345-1555 BLL 23 45 12.4622049264 -15 55 07.836801888   19.21   18.48   ~ 173 1

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