Radio source positions from southern and trans-equatorial very-long-baseline interferometers

Abstract

view Abstract Citations (7) References (19) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Radio source positions from southern and transequatorial very-long-baseline interferometers. Gubbay, J. S. Abstract The positions of compact radio sources were determined from very-long-baseline interferometry (VLBI) using NASA-JPL stations of the Deep Space Network. The displacement in the right-ascension origin and the uncertainty in this value are least when the present results are compared with each of the two VLBI catalogs, namely, the provisional results of Faneslow (1973), 0.005 + or - 0.005 sec, and those of Clark et al. (1976), -0.009 + or - 0.006 sec. The mean estimated error along the right-ascension axis is 0.8 arcsec. For sources with declinations of at least + or - 5 deg, the mean estimated error in declination is 0.6 arcsec. However, for comparisons with the VLBI catalogs, the rms scatter about the mean difference in right ascension is rather less than 0.5 arcsec. Evidence for structure in some sources is discussed, and it is suggested that lunar occultation observation of 1504-167 may reveal class D2 structure. Publication: The Astronomical Journal Pub Date: July 1978 DOI: 10.1086/112254 Bibcode: 1978AJ.....83..697G Keywords: Astronomical Catalogs; Position (Location); Radio Sources (Astronomy); Very Long Base Interferometry; Astronomical Coordinates; Lunar Occultation; Radio Astronomy; Radio Scattering; Astronomy; Positions:Radio Sources; Radio Sources:VLB Interferometry full text sources ADS |