1994A&A...287..390B


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.19CEST13:40:15

1994A&A...287..390B - Astronomy and Astrophysics, volume 287, 390-402 (1994/7-2)

One-year modulation in the flux density time series of low frequency variables.

BONDI M., PADRIELLI L., GREGORINI L., MANTOVANI F., SHAPIROVSKAYA N. and SPANGLER S.R.

Abstract (from CDS):

Low frequency variability of extragalactic radio sources is commonly interpreted in terms of refractive interstellar scintillation. ln order to study the effect of the Earth orbital motion through the scintillation pattern we have analysed 408 MHz variability data on 43 sources in a search for statistically significant one year periodicity which could be attributed to such a motion. This analysis has been carried out by calculating an average flux density structure function for all sources, as well as for subgroups based on galactic latitude, galactic longitude, ecliptic latitude. In all classes we find a clear characteristic time scale of about 0.5 years corresponding to a one year modulation in the time series. The statistical significance of this result is confirmed by Monte Carlo simulations of variable sources and calibrators. This result is also consistent with numerical simulations of both thin and thick screen scattering models based on the refractive interstellar scintillation theory. A significant constraint on the propagation velocity of the turbulent irregularities has been obtained (Virr < 10 km/s), suggesting that the motion between the Earth and the scattering pattern is, on average, mainly determined by the motion of the Earth-Sun system with respect to the Local Standard of Rest and the Earth orbital motion around the Sun.

Abstract Copyright:

Journal keyword(s): interstellar medium - scintillation - radio sources

CDS comments: DA 10 misprint for DA 101, PKS 0834-20 = 0834-201; 4C 66.22 misprint for 4C 62.22

Simbad objects: 41

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Number of rows : 41

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 LBQS 0056-0009 Sy1 00 59 05.5145931113 +00 06 51.619894852   18.07 17.89 16.9   ~ 235 1
2 6C 022440+670742 QSO 02 28 50.05148948 +67 21 03.0293039   19.5   18.1   ~ 224 1
3 4C 05.14 rG 03 23 20.2606504221 +05 34 11.893889982     19     ~ 73 1
4 4C 32.14 QSO 03 36 30.10760600 +32 18 29.3422210     17.50 16.6   ~ 568 1
5 3C 99.0 Sy2 04 01 07.6 +00 36 33   20.200 19.010 18.532   ~ 104 1
6 Mrk 1506 Sy1 04 33 11.0958197353 +05 21 15.617543663   15.72 15.05 10.08   ~ 1805 2
7 ICRF J052109.8+163822 Sy1 05 21 09.88592749 +16 38 22.0517668   19.37 18.84 18.480   ~ 726 1
8 4C 16.14 QSO 05 51 18.8519493374 +16 36 41.300458357     17     ~ 49 1
9 QSO B0605-0834 QSO 06 07 59.69923743 -08 34 49.9781718     18.5 17.70   ~ 381 1
10 QSO B0607-157 QSO 06 09 40.9477650070 -15 42 40.649794982   18.47 18.0 19.90   ~ 282 1
11 EQ 0631+191 Rad 06 34 +19.1           ~ 7 0
12 QSO B0723-007 BLL 07 25 50.63996171 -00 54 56.5441985   17.39 16.57 15.82   ~ 209 1
13 QSO B0736+01 QSO 07 39 18.03389693 +01 37 04.6178588   16.90 16.47 16.19   ~ 613 1
14 ICRF J074110.7+311200 Sy1 07 41 10.7033434 +31 12 00.231016   17.02 16.89 16.322   ~ 401 2
15 QSO B0834-201 QSO 08 36 39.21525294 -20 16 59.5040953   19.45 19.4 18.76   ~ 166 1
16 QSO J0902-1415 QSO 09 02 16.8309580146 -14 15 30.871869075   16.79 16.59 16.4   ~ 217 1
17 4C 40.24 QSO 09 48 55.33815234 +40 39 44.5869810   18.31 18.02 17.85   ~ 298 1
18 4C 01.28 BLL 10 58 29.60520747 +01 33 58.8237691   18.74 18.28 16.68   ~ 618 2
19 ICRF J112027.8+142054 G 11 20 27.80726 +14 20 54.9914   20 20.935 20.100   ~ 137 1
20 QSO J1130-1449 QSO 11 30 07.05259287 -14 49 27.3881476   17.17 16.90 16 16.97 ~ 611 1
21 4C -00.47 QSO 11 50 43.8708922658 -00 23 54.203269861   17.51 17.38 17.1   ~ 334 1
22 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 781 1
23 3C 279 QSO 12 56 11.1664521013 -05 47 21.531840471   18.01 17.75 15.87   ~ 2634 2
24 ICRF J140028.6+621038 Sy2 14 00 28.64868162 +62 10 38.5884658   22.137 20.373 19.530   ~ 155 1
25 7C 1422+2013 QSO 14 24 56.9187781174 +20 00 26.358555839   18.09 17.65     ~ 118 1
26 QSO B1504-167 QSO 15 07 04.78696071 -16 52 30.2670781   18.40 18.5 17.00   ~ 207 1
27 QSO J1512-0906 QSO 15 12 50.53292491 -09 05 59.8295878   16.74 16.54     ~ 1119 1
28 QSO B1524-136 QSO 15 26 59.4419587641 -13 51 00.249268278     20.5     ~ 89 1
29 6C 161147+342017 QSO 16 13 41.0645258703 +34 12 47.911898732   17.98 17.46 17.07   ~ 574 1
30 4C 38.41 QSO 16 35 15.4926950870 +38 08 04.498949104   18.14 17.97 17.25   ~ 729 1
31 QSO B1730-130 QSO 17 33 02.70578476 -13 04 49.5481484   18 18.5 18.78   ~ 954 1
32 ICRF J190255.9+315941 Sy1 19 02 55.93889898 +31 59 41.7017097     17.5     ~ 255 2
33 4C 18.60 Rad 20 35 33.23 +18 57 16.3           ~ 19 0
34 4C 44.37 Rad 20 58 29.21 +44 46 19.7           ~ 4 0
35 QSO B2134+0028 QSO 21 36 38.5862648232 +00 41 54.210724774   17.30 17.08 17.02   ~ 515 2
36 4C 06.69 QSO 21 48 05.4585565234 +06 57 38.605396596   16.85 16.47 15.06   ~ 582 1
37 NAME BL Lac BLL 22 02 43.2913773726 +42 16 39.978417860   15.66 14.72     ~ 1975 1
38 QSO J2225+2118 QSO 22 25 38.04713545 +21 18 06.4150549     18.19 17.65   ~ 151 1
39 4C 11.69 QSO 22 32 36.40890517 +11 43 50.9040717   17.75 17.33     ~ 921 2
40 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2439 2
41 4C 41.45 QSO 22 57 22.07289310 +41 54 16.5308113   20.9 20.9     ~ 65 1

    Equat.    Gal    SGal    Ecl

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2019.10.19-13:40:15

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