2014A&A...563A.111C


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.27CET12:33:13

2014A&A...563A.111C - Astronomy and Astrophysics, volume 563A, 111-111 (2014/3-1)

VLBI observations of the radio quasar J2228+0110 at z = 5.95 and other field sources in multiple-phase-centre mode.

CAO H.-M., FREY S., GURVITS L.I., YANG J., HONG X.-Y., PARAGI Z., DELLER A.T. and IVEZIC Z.

Abstract (from CDS):

A patch of sky in the SDSS Stripe 82 was observed at 1.6 GHz with Very Long Baseline Interferometry (VLBI) using the European VLBI Network (EVN). The data were correlated at the EVN software correlator at JIVE (SFXC). There are fifteen known mJy/sub-mJy radio sources in the target field defined by the primary beam size of a typical 30-m class EVN radio telescope. The source of particular interest is a recently identified high-redshift radio quasar: J222843.54+011032.2 (J2228+0110) at redshift z=5.95. Our aim was to investigate the milli-arcsecond (mas) scale properties of all the VLBI-detectable sources within this primary beam area with a diameter of 20'. The source J2228+0110 was detected with VLBI with a brightness temperature Tb>108K, supporting the active galactic nucleus (AGN) origin of its radio emission, which is conclusive evidence that the source is a radio quasar. In addition, two other target sources were also detected, one of them with no redshift information. Their brightness temperature values (Tb>107K) measured with VLBI suggest a non-thermal synchrotron radiation origin for their radio emission. The detection rate of 20% is broadly consistent with other wide-field VLBI experiments carried out recently. We also derived the accurate equatorial coordinates of the three detected sources using the phase-referencing technique. This experiment is an early attempt of a wide-field science project with SFXC, paving the way for the EVN to conduct a large-scale VLBI survey in the multiple-phase-centre mode.

Abstract Copyright:

Journal keyword(s): techniques: interferometric - radio continuum: galaxies - galaxies: active

CDS comments: Table 1 objects VLA-N are [HBW2011] in SIMBAD.

Simbad objects: 21

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Number of rows : 21

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 M 31 G 00 42 44.330 +41 16 07.50 4.86 4.36 3.44     ~ 11159 1
2 NAME Chandra Deep Field-South reg 03 32 28.0 -27 48 30           ~ 1854 1
3 NAME Lockman Hole reg 10 45 00.0 +58 00 00           ~ 757 0
4 4C 00.81 QSO 22 26 46.5370259 +00 52 11.331423   21.64 20.97 19.62   ~ 69 1
5 FIRST J222842.2+011447 Rad 22 28 42.205 +01 14 47.70           ~ 1 0
6 QSO J2228+0110 QSO 22 28 43.54 +01 10 32.2           ~ 19 0
7 [HBW2011] J222849.8+011337 Rad 22 28 49.842 +01 13 37.47           ~ 1 0
8 NVSS J222851+010709 Rad 22 28 51.38 +01 07 09.4           ~ 1 0
9 [HBW2011] J222851.4+011203 Rad 22 28 51.452 +01 12 03.39           ~ 1 0
10 NVSS J222900+011746 Rad 22 29 00.42 +01 17 46.9           ~ 1 0
11 [HBW2011] J222918.0+010618 Rad 22 29 18.059 +01 06 18.43           ~ 1 0
12 [HBW2011] J222918.6+010903 Rad 22 29 18.689 +01 09 03.09           ~ 1 0
13 [HBW2011] J222925.4+011752 Rad 22 29 25.487 +01 17 52.61           ~ 1 0
14 FIRST J222931.3+011443 Rad 22 29 31.387 +01 14 43.99           ~ 1 0
15 FIRST J222933.8+011538 Rad 22 29 33.805 +01 15 38.04           ~ 1 0
16 FIRST J222938.5+011734 Rad 22 29 38.594 +01 17 34.96           ~ 1 0
17 NVSS J222938+011805 Rad 22 29 38.79 +01 18 05.2           ~ 1 0
18 NVSS J222942+011427 Rad 22 29 41.70 +01 14 28.0           ~ 1 0
19 PKS J2229+0114 Rad 22 29 51.8019350 +01 14 56.724070           ~ 9 1
20 FIRST J222952.9+011219 Rad 22 29 52.916 +01 12 19.77           ~ 1 0
21 3C 454.3 QSO 22 53 57.74798 +16 08 53.5611   16.57 16.10 15.22   ~ 2548 2

    Equat.    Gal    SGal    Ecl

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2021.01.27-12:33:13

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