Multi-Frequency VLBI Observations of NRAO 530

Abstract

We report on VLBA observations of a gamma-ray bright blazar NRAO 530 at multiple frequencies (5, 8, 15, 22, 39, 43, and 45 GHz) in 1997 and 1999. These multi-epoch multi-frequency high-resolution VLBI images exhibit a consistent core-dominated morphology with a bending jet to the north of the core. The quasi-simultaneous data observed at five frequencies (5, 8, 15, 22 and 43 GHz) in February 1997 enable us to estimate the spectra of compact VLBI components in this highly variable source. Flat spectra are seen in central two components (A and B), and the most compact component A with the flattest spectral index at the south end is identified as the core.

9 pages, 6 figures, accepted by A&A

References in corpus (4)

• Multi-Epoch VLBA Observations of EGRET-Detected Quasars and BL Lac Objects: Superluminal Motion of Gamma-Ray Bright Blazars
• The simultaneous spectrum of Sgr A* from 20cm to 1mm and the nature of the mm-excess
• A 5 GHz Southern Hemisphere VLBI Survey of Compact Radio SOurces - I
• Space VLBI Observations Show $T_b>10^{12}K$ in the Quasar NRAO 530

Cited by in corpus (11)

• The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA
• EHT-HOPS pipeline for millimeter VLBI data reduction
• Persistent Non-Gaussian Structure in the Image of Sagittarius A* at 86 GHz
• High-frequency very long baseline interferometry studies of NRAO 530
• Observations of flat-spectrum radio sources at 850 microns from the James Clerk Maxwell Telescope II. April 2000 to June 2005
• The parsec-scale jet of PKS 1749+096
• Multi-waveband polarimetric observations of NRAO 530 on parsec-scale
• Reconciling inverse-Compton Doppler factors with variability Doppler factors in blazar jets
• A procedure for making high dynamic-range radio images: Deep imaging of the kiloparsec-scale radio structures of a distant blazar, NRAO 530, with JVLA data
• A Giant Metrewave Radio Telescope Survey of Radio-loud Broad Absorption Line Quasars
• VLBI Detection of an Active Radio Source Potentially Driving 100-kpc Scale Emission in the Ultraluminous Infrared Galaxy IRAS F01004$-$2237