Query : 1997A&AS..122..235L

1997A&AS..122..235L - Astron. Astrophys., Suppl. Ser., 122, 235-247 (1997/April-2)

Radio-loud active galaxies in the northern ROSAT All-Sky Survey. I. Radio identifications.


Abstract (from CDS):

We present 5 GHz high resolution VLA observations of 2,127 radio- and X-ray-emitting sources found in both the Green Bank (GB) 5GHz radio catalog and the ROSAT All-Sky Survey (RASS). We report core flux densities and positions accurate to ±0.5". Combined with the GB measurements of the total radio emission, we derive the core-to-lobe ratio of objects in our sample and discuss their core-dominance relative to samples of radio galaxies and BL Lacertae objects. Our results show the RASS/Green Bank (RGB) sample is approximately an order of magnitude more core-dominated than the radio galaxy sample, but is more than an order of magnitude less core-dominated than highly beamed BL Lacertae objects. Using simple beaming models, this indicates the typical object in the RGB catalog exhibits moderately beamed radio emission and is oriented at an angle to the line-of-sight <θ>RGB∼25°-35°. The case of the origin of the X-ray emission is not as clear; the data are consistent with either an anisotropic unbeamed or moderately beamed X-ray component.

Abstract Copyright:

Journal keyword(s): surveys - catalogs - radio continuum: galaxies - X-rays: galaxies - galaxies: active - quasars: general

VizieR on-line data: <Available at CDS (J/A+AS/122/235): table2 table3 table4>

Nomenclature: Tables 2, 3: RGB JHHMM+DDdA N=1861+436

Simbad objects: 4

goto Full paper

goto View the references in ADS

Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 3C 48 QSO 01 37 41.2996631208 +33 09 35.080388820   16.62 16.20     ~ 2735 2
2 7C 1556+2017 QSO 15 58 37.0918480632 +20 09 23.644905552   19.53 19.36     ~ 21 1
3 2MASX J17570667+5351379 Bla 17 57 06.7 +53 51 37   13.4       ~ 12 1
4 NVSS J222434+434405 Rad 22 24 35.3 +43 44 10           ~ 9 1

To bookmark this query, right click on this link: simbad:objects in 1997A&AS..122..235L and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact