2003AJ....125.1811C

Query : 2003AJ....125.1811C

2003AJ....125.1811C - Astron. J., 125, 1811-1816 (2003/April-0)

Microvariability in Seyfert galaxies.

CARINI M.T., NOBLE J.C. and MILLER H.R.

Abstract (from CDS):

We present the results of a search for microvariability in a sample of eight Seyfert galaxies. Microvariability (i.e., variations occurring on timescales of tens of minutes to hours) has been conclusively demonstrated to exist in the class of active galactic nuclei (AGNs) known as blazars. Its existence in other classes of AGNs is far less certain. We present the results of a study of eight Seyfert 1 galaxies, which were intensively monitored in order to determine whether such variations exist in these objects. Only one object, Ark 120, displayed any evidence of microvariations. The implications of these results with respect to current models of the mechanisms responsible for the observed emission in Seyfert galaxies are discussed. We compare our results with those obtained from other studies of microvariability in different classes of AGNs.

Abstract Copyright: ∼

Journal keyword(s): Galaxies: Photometry - Galaxies: Seyfert

CDS comments: T.3 : PG 0804+716 is a misprint for PG 0804+761

Simbad objects: 30

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Number of rows : 30
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 335 Sy1 00 06 19.5372339024 +20 12 10.617404076   14.19 13.85     ~ 1344 0
2 Mrk 1501 Bla 00 10 31.00590413 +10 58 29.5042981   15.96 15.40 12.22   ~ 763 1
3 2MASS J01135451+3907443 Sy1 01 13 54.5092832352 +39 07 44.482392156   16.7 16.7     ~ 19 0
4 Mrk 357 SyG 01 22 40.5874370808 +23 10 14.691256572   15.76 15.40     ~ 94 0
5 ESO 113-45 Sy1 01 23 45.7631533440 -58 48 20.808928944   14.08 13.83 13.34   ~ 965 0
6 Mrk 1014 Sy1 01 59 50.2534701768 +00 23 40.864244784   16.08 15.87     ~ 606 0
7 Z 395-23 Sy1 05 16 11.4092471904 -00 08 59.157166920   14.30 13.92     ~ 953 1
8 QSO B0530-37 QSO 05 32 30.7388778192 -37 53 20.579001828     16.7     ~ 29 0
9 Z 232-3 Sy1 05 54 53.6080860768 +46 26 21.624853488   15.37 14.62     ~ 563 3
10 2MASS J08105865+7602424 Sy1 08 10 58.6641543864 +76 02 42.450451260   15.03 14.71     ~ 508 0
11 Ton 951 Sy1 08 47 42.4485615096 +34 45 04.482515304   14.83 14.50     ~ 487 0
12 Mrk 110 Sy1 09 25 12.8479065576 +52 17 10.386311208   16.82 16.41     ~ 681 1
13 QSO B1103-006 Sy1 11 06 31.7743074480 -00 52 52.380450264   16.39 16.46     ~ 234 1
14 IC 2746 Sy2 11 21 47.1179115936 +11 44 18.909849876   15.38 14.93     ~ 234 0
15 NGC 4151 Sy1 12 10 32.5759813872 +39 24 21.063527532   12.18 11.48     ~ 3938 2
16 Z 294-4 Sy1 12 56 14.2341182928 +56 52 25.238373852   14.68 13.84     ~ 2096 3
17 2MASS J13234951+6541480 Sy1 13 23 49.5182430360 +65 41 48.164463600   16.01 15.84     ~ 185 1
18 Ton 182 Sy1 14 05 16.2178674936 +25 55 34.117540788   15.42 15.34     ~ 268 0
19 LEDA 50824 Sy1 14 13 48.3306274368 +44 00 14.003371296   14.99 14.99     ~ 402 0
20 LEDA 51016 Sy1 14 17 00.8224797456 +44 56 06.336360024   16.93 16.63     ~ 275 0
21 ICRF J151443.0+365050 Sy1 15 14 43.0683049560 +36 50 50.355436776   17.11 17.01 15.83   ~ 422 1
22 Mrk 877 Sy1 16 20 11.2799789400 +17 24 27.515242152   15.79 15.39     ~ 286 0
23 NGC 6814 Sy1 19 42 40.5862186152 -10 19 25.108718844   15.33 14.21 11.7 11.3 ~ 866 0
24 QSO B2209+184 BLL 22 11 53.8888927344 +18 41 49.861248288   16.09 15.44 11.96   ~ 187 2
25 Z 428-65 Sy1 22 17 12.2637639888 +14 14 20.917852980   15.02 14.66     ~ 371 0
26 2MASX J22502534+1419519 Sy1 22 50 25.3475290512 +14 19 52.095751140   17.28 16.97 17.243   ~ 210 1
27 NGC 7469 Sy1 23 03 15.6 +08 52 26 12.60 13.00 12.34     ~ 2253 3
28 4C 09.72 BLL 23 11 17.7546073272 +10 08 15.756513972   16.15 16.00     ~ 203 1
29 4C 09.74 Bla 23 46 36.8384562240 +09 30 45.514903032   16.23 15.97 15.99   ~ 332 2
30 4C -01.61 BLL 23 51 56.1224889360 -01 09 13.315371768   16.83 16.59     ~ 380 1

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