2010MNRAS.404.1992R


Query : 2010MNRAS.404.1992R

2010MNRAS.404.1992R - Mon. Not. R. Astron. Soc., 404, 1992-2017 (2010/June-1)

Short-term flux and colour variations in low-energy peaked blazars.

RANI B., GUPTA A.C., STRIGACHEV A., BACHEV R., WIITA P.J., SEMKOV E., OVCHAROV E., MIHOV B., BOEVA S., PENEVA S., SPASSOV B., TSVETKOVA S., STOYANOV K. and VALCHEVA A.

Abstract (from CDS):

We have measured multiband optical flux and colour variations for a sample of 12 low-energy peaked blazars (LBLs) on short, day-to-month, time-scales. Our sample contains six BL Lacertae objects (BL Lacs) and six flat spectrum radio quasars (FSRQs). These photometric observations, made during 2008 September to 2009 June, used five optical telescopes, one in India and four in Bulgaria. We detected short-term flux variations in 11 of these blazars and colour variability in eight of them. Our data indicate that six blazars (3C 66A, AO 0235+164, S50716+714, PKS 0735+178, OJ 287 and 3C 454.3) were observed in pre- or post-outburst states, five (PKS 0420-014, 4C 29.45, 3C 279, PKS 1510-089 and BL Lac) were in a low state, while one (3C 273) was in an essentially steady state. The duty cycles for flux and colour variations on short time-scales in these LBLs are ∼92 and ∼33 per cent, respectively. The colour versus magnitude correlations seen here support the hypothesis that BL Lac objects tend to become bluer with increase in brightness; however, FSRQs may show the opposite trend, and there are exceptions to these trends in both categories of blazar. We briefly discuss emission models for active galactic nuclei that might explain our results.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): galaxies: active - BL Lacertae objects: general - galaxies: jets - galaxies: photometry

CDS comments: T.3 : Some standard stars are not identified

Simbad objects: 48

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Number of rows : 48
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 3C 66A BLL 02 22 39.6114771888 +43 02 07.799534304   15.71 15.21 14.5   ~ 844 1
2 [MMW76] 0235+164 8 * 02 38 +16.5   18.22 16.58 15.79 14.94 ~ 4 0
3 [MMW76] 0235+164 3 * 02 38 29.8 +16 36 44   13.68 12.92 12.48 12.08 ~ 7 0
4 [MMW76] 0235+164 2 * 02 38 32.5 +16 36 01   13.55 12.71 12.23 11.79 ~ 7 0
5 [MMW76] 0235+164 1 * 02 38 36.7132346280 +16 36 26.929677276     13.07   12.35 ~ 7 0
6 [MMW76] 0235+164 6 * 02 38 45.1 +16 38 47     14.02 13.64 13.30 ~ 4 0
7 QSO B0420-0127 QSO 04 23 15.8007747432 -01 20 33.063518580   17.50 17.00 16.28   ~ 1137 3
8 TYC 4368-1025-1 * 07 21 33.3741963648 +71 19 21.092406420   11.90 11.31 11.12 10.92 ~ 7 0
9 [GVR97] S5 0716+714 B * 07 21 52.3289285184 +71 18 17.712655380   13.04 12.43   11.79 ~ 10 0
10 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 14.17 14.27   ~ 1223 1
11 [GVR97] S5 0716+714 C * 07 21 54.3632292192 +71 19 20.917412904   14.15 13.55   12.85 ~ 13 0
12 [VRL98] S5 0716+71 7 * 07 22 +71.0   14.55 13.74 13.32   ~ 3 0
13 [GVR97] S5 0716+714 D * 07 22 12.6270485016 +71 21 14.800738716   14.24 13.63   12.97 ~ 8 0
14 [NMR2005] b * 07 22 18.0489095088 +71 23 34.534384584   13.69 13.23     ~ 5 0
15 [NMR2005] o * 07 22 28.2091433712 +71 17 37.554640404   14.70 14.10     ~ 4 0
16 [NMR2005] c * 07 22 36.39 +71 22 48.7   11.54 10.99 10.63   ~ 4 0
17 [W73] PKS 0735+17 C * 07 38 02.4889068024 +17 41 21.967816236   15.48 14.40 13.85 13.32 ~ 6 0
18 QSO J0738+1742 BLL 07 38 07.3935719136 +17 42 18.998218764   16.76 16.22 15.78   ~ 945 1
19 USNO-A2.0 1050-05296579 * 07 38 08.3573358024 +17 44 59.152702092   16.48 15.80 15.49 15.12 ~ 6 0
20 [W73] PKS 0735+17 A * 07 38 23.2916019936 +17 42 42.449961168   13.87 13.40 13.10 12.82 ~ 4 0
21 QSO J0854+2006 BLL 08 54 48.8749846272 +20 06 30.639583620   15.91 15.43 15.56   ~ 2190 1
22 4C -00.35 Rad 08 58 42.01 -00 27 47.3           ~ 12 1
23 Ton 599 QSO 11 59 31.8338889192 +29 14 43.826803116   14.80 14.41 17.652 13.39 ~ 858 1
24 [S65] G * 12 29.0 +02 03   14.12 13.56 13.16 12.83 ~ 7 0
25 3C 273 BLL 12 29 06.6998257176 +02 03 08.597629980   13.05 14.830 14.11   ~ 5598 1
26 [S65] D * 12 29.2 +02 03   13.17 12.68 12.31 11.99 ~ 8 0
27 [S65] E * 12 29.2 +02 03   13.33 12.69 12.27 11.84 ~ 10 0
28 [S65] C * 12 29.2 +02 03   12.85 11.87 11.30 10.74 ~ 8 0
29 3C 279 Bla 12 56 11.1663795384 -05 47 21.528432492   18.01 17.75 15.87   ~ 2895 2
30 [RVL98] PKS 1510-089 6 * 15 12 -09.1   16.09 15.16 14.61   ~ 5 0
31 [RVL98] PKS 1510-089 2 * 15 12 -09.1   13.74 13.26 12.95 12.60 ~ 6 0
32 [RVL98] PKS 1510-089 5 * 15 12 -09.1   15.43 14.70 14.35   ~ 6 0
33 [RVL98] PKS 1510-089 4 * 15 12 -09.1   15.36 14.72 14.34 13.87 ~ 6 0
34 [RVL98] PKS 1510-089 3 * 15 12 -09.1   15.16 14.44 13.98 13.54 ~ 6 0
35 [RVL98] PKS 1510-089 1 * 15 12 -08.9   12.23 11.60 11.23 10.87 ~ 6 0
36 QSO J1512-0906 Bla 15 12 50.5330369584 -09 05 59.830296360   16.74 16.54     ~ 1239 1
37 UCAC4 662-103456 * 22 02 32.6299398528 +42 16 47.437123332   15.782 14.468 14.113 12.93 ~ 12 0
38 UCAC4 662-103462 * 22 02 36.0642124344 +42 16 53.869147068   16.491 15.672 15.576 14.34 ~ 11 0
39 UCAC4 662-103474 * 22 02 40.0629412654 +42 17 09.749272040   15.101 14.265 14.062 13.23 ~ 12 0
40 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2140 1
41 UCAC4 662-103491 * 22 02 45.4177487400 +42 16 35.475495636   14.628 12.939 12.431 11.09 ~ 11 0
42 4C 11.69 QSO 22 32 36.4089639768 +11 43 50.904601176   17.75 17.33     ~ 1051 2
43 [A71] 3C 454.3 5 * 22 53 52.7 +16 09 50   17.00 15.74     ~ 4 0
44 [A71] 3C 454.3 2 * 22 53 55.3 +16 07 08   15.87 15.21 14.73 14.31 ~ 5 0
45 3C 454.3 Bla 22 53 57.7480438728 +16 08 53.561508864   16.57 16.10 15.22   ~ 2697 2
46 [ZEH2003] RX J2253.9+1608 3 * 22 53 58.1 +16 09 06   14.70 13.71     ~ 5 0
47 [A71] 3C 454.3 1 * 22 53 59.9 +16 09 53   16.85 15.86 15.32 14.80 ~ 5 0
48 [FTR98] 2251+158 C1 * 22 54 04.7 +16 07 47     15.67 15.27 14.71 ~ 2 0

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2022.09.26-08:49:49

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