1995PASP..107..863S

Query : 1995PASP..107..863S

1995PASP..107..863S - Publ. Astron. Soc. Pac., 107, 863-870 (1995/September-0)

Time scales of long-term optical base-level fluctuations in three classes of AGN.

SMITH A.G. and NAIR A.D.

Abstract (from CDS):

The long-term optical light curves of many active galactic nuclei (AGN) disply smooth, cyclical changes in level on timescales of years. Earlier work by Smith et al. (1993) estimated the timescales of this previously undiscussed phenomenon for a sample of 60 classical radio-loud quasars. The present study extends the analysis to three additional groups of AGN: the BL Lacertids, the compact galaxies, and the radio-quiet quasars. The average timescale of the BL Lacertids is approximately equal to that of the classical quasars, lending credence to unified models of these objects. The long-term fluctuations of the compact galaxies and the radio-quiet quasars are slower. Our analysis tends to support the division of the BL Lacertids into two populations.

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Journal keyword(s):

Simbad objects: 66

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Number of rows : 66
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 Mrk 1501 Bla 00 10 31.00590413 +10 58 29.5042981   15.96 15.40 12.22   ~ 763 1
2 4C 12.05 BLL 00 38 18.0163985064 +12 27 31.244974200   17.5 17.5     ~ 54 2
3 QSO B0048-09 BLL 00 50 41.3172421464 -09 29 05.210474100 16.74 16.39 16.22 16.14   ~ 480 2
4 LBQS 0058+0155 QSO 01 00 54.1201107072 +02 11 36.331220364   17.48 17.16     ~ 166 0
5 QSO B0109+224 BLL 01 12 05.8247044608 +22 44 38.785880796   16.00 15.66 15.47   ~ 373 2
6 LAMOST J013102.36+074341.6 Sy1 01 31 02.3567 +07 43 41.605   18.31 18.02     ~ 25 0
7 2E 405 Sy1 01 33 07.0057917072 +03 39 04.571116560   17.01 17.04     ~ 44 0
8 PHL 2432 QSO 01 42 34.6913547696 +06 25 39.132426540   18.28 18.15     ~ 20 0
9 2MASS J01502535+0914512 Sy1 01 50 25.3599701928 +09 14 51.071011980   17.38 17.4     ~ 50 0
10 QSO B0148+090 Sy1 01 51 30.8 +09 17 25   17.43 17.50     ~ 36 0
11 PHL 1222 QSO 01 53 53.8926173376 +05 02 57.118052184   18.04 17.63     ~ 109 0
12 2MASS J01542798+0448183 Sy1 01 54 27.9921613320 +04 48 18.160685208   17.01 16.91     ~ 89 0
13 QSO J0217+0144 Bla 02 17 48.95475095 +01 44 49.6990271   16.74 16.09 18.51 13.29 ~ 455 1
14 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 942 2
15 QSO B0235+1624 BLL 02 38 38.93010450 +16 36 59.2745528   16.46 15.50 15.92   ~ 1614 2
16 PKS J0303-2407 BLL 03 03 26.5025589984 -24 07 11.426291220   16.55 16.18     ~ 249 1
17 QSO B0306+101 Bla 03 09 03.62349423 +10 29 16.3409179   18.45   19.91   ~ 214 1
18 PMN J0326+0225 BLL 03 26 13.9481827296 +02 25 14.675937708   17.05 16.55 15.3   ~ 255 1
19 QSO B0338-214 BLL 03 40 35.60785848 -21 19 31.1721373   16.04 17.1 17.07   ~ 182 1
20 PMN J0416+0105 BLL 04 16 52.4945693352 +01 05 23.899102620   16.86 16.38 16   ~ 302 1
21 QSO B0422+004 BLL 04 24 46.8421990080 +00 36 06.329375028 16.15 15.94 16.98     ~ 378 1
22 MCG+01-12-009 Bla 04 33 11.0956735296 +05 21 15.619461552   15.72 15.05 10.08   ~ 2099 2
23 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
24 QSO J0738+1742 BLL 07 38 07.39375312 +17 42 18.9981506   16.76 16.22 15.78   ~ 1045 1
25 QSO B0754+10 BLL 07 57 06.64295154 +09 56 34.8522544   15.43 15.00 15.99   ~ 461 1
26 QSO B0818-128 BLL 08 20 57.44762374 -12 58 59.1692275   15.30 15.00 16.5   ~ 187 1
27 QSO B0829+047 BLL 08 31 48.8770033992 +04 29 39.086842884   17.10 16.4 14.55   ~ 511 2
28 ICRF J083216.0+183212 Sy2 08 32 16.0416 +18 32 12.124   18       ~ 60 1
29 PG 0851+202 BLL 08 54 48.8749846272 +20 06 30.639583620   15.649 15.146 15.446   ~ 2513 1
30 ATO J146.9381+07.4223 Sy1 09 47 45.1433922288 +07 25 20.595729756   17.37 16.95     ~ 389 1
31 Z 184-50 BLL 11 04 27.3140835504 +38 12 31.798495872   13.50 12.90 8.31   ~ 2841 1
32 4C 20.25 BLL 11 25 58.7421679224 +20 05 54.337332372   18.55 17.96     ~ 59 1
33 7C 1147+2434 BLL 11 50 19.21218244 +24 17 53.8352318   16.26 15.74 15.80   ~ 294 1
34 Ton 605 HB* 12 16 53.6748432768 +30 04 08.692883544   16.110 15.98     B 223 0
35 RX J1217.8+3007 BLL 12 17 52.0819904040 +30 07 00.634936872   16.07 15.62 13.47   G7 516 1
36 PG 1218+304 BLL 12 21 21.9426947832 +30 10 37.158534012   16.50 15.85 15.7   ~ 497 1
37 7C 1219+2830 BLL 12 21 31.6904439888 +28 13 58.500308172   16.81 16.11 14.24   ~ 924 1
38 BSO 1 QSO 12 48 51.8479265160 +37 30 28.312086096   17.29 16.98     WN3ha 77 0
39 [B68b] 46 Sy1 12 48 53.8985031096 +34 24 29.374618644   18.19 17.83     WN4ha 50 0
40 BSO 2 QSO 12 50 41.8239074976 +33 30 52.596504396   18.92 18.64     ~ 44 0
41 [B68b] 114 Sy1 12 55 20.3609420664 +35 39 10.487827692   18.00 17.92     ~ 29 0
42 [B68b] 154 QSO 12 57 24.4741286760 +35 05 08.182874724   18.88 18.56     ~ 37 0
43 [B68b] 194 QSO 12 58 29.7561604704 +35 28 43.655389536   18.36 17.96     ~ 75 1
44 [B68b] 201 QSO 12 59 48.7852053336 +34 23 22.627553928   17.05 16.79     ~ 100 0
45 BSO 6 QSO 13 01 52.6463702616 +34 11 02.050048068   17.92 17.87     ~ 57 0
46 [B68b] 312 QSO 13 07 11.3497150944 +37 12 36.356815944   19.72 19.61     ~ 23 0
47 US 371 BLL 13 10 28.66385420 +32 20 43.7828340   15.61 15.24 17.91   ~ 917 1
48 BSO 11 QSO 13 13 38.1855700920 +35 59 48.476481036   18.47 18.41     ~ 48 0
49 4C 05.57 BLL 13 42 43.6243995312 +05 04 32.206800972   18.45 17.77     ~ 85 1
50 6C 141804+543700 BLL 14 19 46.5974051952 +54 23 14.787857796   16.17 15.65 14.16   ~ 630 1
51 ESO 514-1 BLL 15 17 41.8134049824 -24 22 19.482207024   15.13 14.00 13.95   ~ 815 3
52 4C 14.60 BLL 15 40 49.49151924 +14 47 45.8846989   17.72 17.30 17.240   ~ 448 1
53 PG 1553+113 BLL 15 55 43.0440048528 +11 11 24.365649948 14.91 14.72 14.57 13.99   ~ 672 1
54 4C 17.71 rG 16 47 41.83950053 +17 20 11.8609101   18.50       ~ 57 1
55 Z 225-7 BLL 16 53 52.21668403 +39 45 36.6088754 14.09 14.15 13.29 8.26   ~ 2304 2
56 ZW I 187 BLL 17 28 18.6242294352 +50 13 10.469553996   16.55 15.97 12.95   ~ 396 1
57 RX J1748.5+7005 BLL 17 48 32.8402992264 +70 05 50.768819304   17.46 17.01 15.48   ~ 456 2
58 4C 09.57 BLL 17 51 32.81857326 +09 39 00.7284066   17.46 16.78 15.57   ~ 1007 1
59 Z 340-35 BLL 18 06 50.6802916920 +69 49 28.109609256   14.77 14.22 11.39   ~ 909 1
60 RX J1830.3+7312 Sy1 18 30 23.1622671336 +73 13 10.710219756   15.5 15.5     ~ 50 0
61 3C 390.3 Bla 18 42 08.9904975672 +79 46 17.127835104   16.06 15.38     ~ 1381 1
62 PKS J2158-3013 BLL 21 58 52.0652249880 -30 13 32.118447792   13.36 13.09 12.62   ~ 1829 1
63 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1
64 3C 446 BLL 22 25 47.25929101 -04 57 01.3907626   18.83 18.39 16.3   ~ 863 1
65 QSO B2254+0727 BLL 22 57 17.30311778 +07 43 12.3025633   17.07 16.36     ~ 317 1
66 QSO B2300-189 Bla 23 03 02.9760289032 -18 41 25.823118480   18.29 17.82 16.569   ~ 142 1

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