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Occultation of Radio Sources for the Linkage of Radio and Stellar Reference Frames

Published online by Cambridge University Press:  19 July 2016

Mitsuru Sôma
Affiliation:
National Astronomical Observatory Mitaka, Tokyo 181, Japan
Masanori Miyamoto
Affiliation:
National Astronomical Observatory Mitaka, Tokyo 181, Japan
Shinko Aoki
Affiliation:
National Astronomical Observatory Mitaka, Tokyo 181, Japan

Abstract

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The right ascension of the radio source 3C273B, which serves as a right ascension zero point in radio astrometric work, has been determined from lunar occultations and photographic observations.

We re-analyze here the lunar occultations of 3C273B using the recent precise lunar ephemeris and obtain its right ascension referred to the FK5 equinox at J2000.0. The obtained right ascension is 12h29m06s.6946±0s.007 at its mean observation epoch of 1963.62.

Predictions of occultations of radio sources by the Moon and planets are also given. Observations of them are encouraged in order to improve the accuracy of the linkage between radio and stellar reference frames.

Type
Part 4: Realization and comparison of reference frames
Copyright
Copyright © Kluwer 1990 

References

Aoki, S., Sôma, M., Nakajima, K., Niimi, Y., Fujishita, M., and Takahashi, Y. (1986) ‘The conversion from the B1950 FK4-based position to the J2000 position of celestial objects’, in Eichhorn, H. K. and Leacock, R. J. (eds.), Astrometric Techniques (IAU Symp. No 109), D. Reidel Publishing Company, Dordrecht, pp. 123131.CrossRefGoogle Scholar
Argue, A. N., de Vegt, C., Elsmore, B., Fanselow, J., Harrington, R., Hemenway, P., Johnston, K. J., Kühr, H., Kumkova, I., Niell, A. E., Walter, H., and Witzel, A. (1984) ‘A catalog of selected compact radio sources for the construction of an extragalactic radio/optical reference frame’, Astron. Astrophys. 130, 191199.Google Scholar
Chapront-Touzé, M. and Chapront, J. (1982) ‘ELP2000-82’, Magnetic Tape. Google Scholar
Clark, T. A., Hutton, L. K., Marandino, G. E., Counselman, C. C., Robertson, D. S., Shapiro, I.I., Wittels, J. J., Hinteregger, H. F., Knight, C. A., Rogers, A. E. E., Whitney, A. R., Niell, A. E., Rönnäng, B. O., and Rydbeck, O. E. H. (1976) ‘Radio source positions from very-long-baseline interferometry observations’, Astron. J. 81, 599603.CrossRefGoogle Scholar
Duncombe, R. L., Fricke, W., Seidelmann, P. K., and Wilkins, G. A. (1977) ‘Joint report of the working groups of IAU commission 4 on precession, planetary ephemerides, units and time-scales’, Trans. IAU XVI B, 5667.Google Scholar
Elsmore, B. (1979) ‘Review of radio astrometry I. Radio measurements’, in Prochaska, F. V. and Tucker, R. H. (eds.), Modern Astronomy (IAU Coll. No. 48), Univ. Obs. Vienna, pp.9399.Google Scholar
Hazard, C., Sutton, J., Argue, A. N., Kenworthy, C. M., Morrison, L. V., and Murray, C. A. (1971) ‘Accurate radio and optical positions of 3C273B’, Nature Physical Science 233, 8991.CrossRefGoogle Scholar
Linfield, R. P. (1989) ‘Using planetary occultations of radio sources for frame-tie measurements I. Motivation and search for events’, draft for JPL TDA Progress Reports. Google Scholar
Morabito, D. D., Niell, A. E., Preston, R. A., Linfield, R. P., Wehrle, A. E., and Faulkner, J. (1986) ‘VLBI observations of 416 extragalactic radio sources’, Astron. J. 91, 10381050.CrossRefGoogle Scholar
Morrison, L. V. and Sadler, Flora McBain (1969) ‘An analysis of lunar occultations 1960–66’, Mon. Not. Roy. Astron. Soc. 144, 129141.CrossRefGoogle Scholar
Sôma, M. (1985) ‘An analysis of lunar occultations in the years 1955–1980 using the new lunar ephemeris ELP2000’, Celes. Mech. 35, 4588.CrossRefGoogle Scholar
Sovers, O. J. (1989) ‘JPL 1989-3’, submitted to the IERS.Google Scholar
Watts, C. B. (1963) ‘The marginal zone of the Moon’, Astron. Pap. Amer. Ephem. XVII, U. S. Government Printing Office, Washington, D. C. Google Scholar
Witzel, A. and Johnston, K. J. (1982) ‘Candidate radio sources for a radio/optical reference catalog’, Abhandlungen aus der Hamburger Sternwarte Band X, Heft 3, 151164.Google Scholar