==========================================================================
J/MNRAS/414/1397 Radio study of double-double radio galaxy 3C293 (Joshi+, 2011)
The following files can be converted to FITS (extension .fit or fit.gz)
tablea1.dat
==========================================================================
Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/MNRAS/414/1397
==========================================================================
drwxr-xr-x 29 cats archive 4096 Mar 12 2018 [Up]
drwxr-xr-x 3 cats archive 252 Jan 13 2023 [TAR file]
-rw-r--r-- 1 cats archive 472 Dec 19 2022 .message
-r--r--r-- 1 cats archive 4363 Apr 4 2012 ReadMe
-rw-r--r-- 1 cats archive 612 Apr 4 2012 +footg5.gif
-rw-r--r-- 1 cats archive 2190 Apr 4 2012 +footg8.gif
-r--r--r-- 1 cats archive 14906 Feb 9 2012 tablea1.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe :J/MNRAS/414/1397 Radio study of double-double radio galaxy 3C293 (Joshi+, 2011)
================================================================================
A radio study of the double-double radio galaxy 3C293.
Joshi S.A., Nandi S., Saikia D.J., Ishwara-Chandra C.H., Konar C.
<Mon. Not. R. Astron. Soc., 414, 1397-1404 (2011)>
=2011MNRAS.414.1397J
================================================================================
ADC_Keywords: Galaxies, radio ; Radio continuum
Keywords: galaxies: active - galaxies: individual: 3C 293 - galaxies: nuclei -
radio continuum: galaxies
Abstract:
We present radio continuum observations at frequencies ranging from
150 to 5000MHz of the misaligned double-double radio galaxy
(DDRG) 3C 293 (J1352+3126) using the Giant Metrewave Radio Telescope
(GMRT) and the Very Large Array (VLA). The spectra of the outer lobes
and the central source are consistent with being straight, indicating
spectral ages of < 17-23Myr for the outer lobes and < 0.1Myr for
the central source. The north-western lobe has a prominent hotspot
suggesting that the interruption of jet activity is < 0.1Myr,
consistent with the age of the inner double. The time-scale of
interruption of jet activity appears significantly smaller than
observed in most other DDRGs which are often associated with giant
radio sources. These observations suggest that there is a wide range
of time-scales of interruption of jet activity in active galaxies.
Description:
The analysis presented in this paper is based on radio observations
made with the GMRT and on the VLA archival data.
All sources with a peak flux density >=7sigma, where sigma is the
primary beam corrected local rms noise in units of mJy/beam are
listed in tablea1.dat. The values of sigma range from 8.6mJy/beam
near 3C293 to typical values of 3-4mJy/beam in regions without strong
sources. There are a total of 320 sources. All but three of the weaker
sources (J1352+3059, J1352+3039 and J1357+3111) are seen in the NVSS
images at 1400MHz. Using 5 times the rms noise in the NVSS images
yields spectral indices steeper than 1.2 for these three sources.