A NEW HARDWARE CORRELATOR IN KOREA: PERFORMANCE EVALUATION USING KVN OBSERVATIONS
| Autor: | Sang-Sung Lee, Kiyoaki Wajima, Noriyuki Kawaguchi, Dong-Gyu Jung, Hyo Ryoung Kim, Jongsoo Kim, Duk-Gyoo Roh, Se-Jin Oh, Chung Sik Oh, Do-Young Byun, Jae-Hwan Yeom, Taehyun Jung, Katsunori M. Shibata |
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| Rok vydání: | 2015 |
| Předmět: |
Physics
Brightness business.industry FOS: Physical sciences Astronomy and Astrophysics Astrometry Amplitude Software Space and Planetary Science Observatory Very-long-baseline interferometry Calibration Astrophysics - Instrumentation and Methods for Astrophysics business Visibility Instrumentation and Methods for Astrophysics (astro-ph.IM) Computer hardware |
| Zdroj: | Journal of The Korean Astronomical Society. 48:125-137 |
| ISSN: | 1225-4614 |
| Popis: | We report results of the performance evaluation of a new hardware correlator in Korea, the Daejeon correlator, developed by the Korea Astronomy and Space Science Institute (KASI) and the National Astronomical Observatory of Japan (NAOJ). We conducted Very Long Baseline Interferometry (VLBI) observations at 22~GHz with the Korean VLBI Network (KVN) in Korea and the VLBI Exploration of Radio Astrometry (VERA) in Japan, and correlated the aquired data with the Daejeon correlator. For evaluating the performance of the new hardware correlator, we compared the correlation outputs from the Daejeon correlator for KVN observations with those from a software correlator, the Distributed FX (DiFX). We investigated the correlated flux densities and brightness distributions of extragalactic compact radio sources. The comparison of the two correlator outputs show that they are consistent with each other within $ 13 pagee, 9 figures, 3 tables, to appear in JKAS (received February 9, 2015; accepted March 16, 2015) |
| Databáze: | OpenAIRE |
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