The Use of the Hubble Space Telescope for Global Reference Frame Work

Highlights of Astronomy ◽

10.1017/s1539299600006250 ◽

1986 ◽

Vol 7 ◽

pp. 87-88

Author(s):

P. D. Hemenway

Keyword(s):

Transfer Functions ◽

Hubble Space Telescope ◽

Field Of View ◽

Optimum Conditions ◽

Small Aperture ◽

Space Telescope ◽

Frame Work ◽

Global Reference Frame ◽

Better Than ◽

Small Field Of View

The Hubble Space Telescope (HST) will have the capability of making relative astrometric measurements with an accuracy of four to ten times better than similar ground based measurements. The instruments of choice will be the Fine Guidance Sensors (FGS’s). Details of the instrumentation have been given elsewhere (c.f. Jefferys, 1980). Each FGS consists of two interferometer detectors which look at a small aperture located within a larger field of view (FOV). The raw data consist of encoder readings, from “star selectors”, and error signals derived from the interferometer transfer functions. The star selector positions determine the position of the small aperture within the pickles. The precision is always less than 0.001 arcsec, with an expected accuracy of 0.002 to 0.003 arcsec per observation. Under optimum conditions, the best expected accuracy is 0.0016 arcsec per observation. An observation will consist of the relative positions of several objects in one pickle. Thus the highest accuracy observations will be relative observations within a relatively small field of view.

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Improving the dynamical reference frame through minor planet orbit correction using crossing point observations

Symposium - International Astronomical Union ◽

10.1017/s0074180900119266 ◽

1988 ◽

Vol 128 ◽

pp. 55-60

Author(s):

Arthur L. Whipple ◽

Raynor L. Duncombe ◽

Paul D. Hemenway

Keyword(s):

Computer Program ◽

Reference Frame ◽

Reference System ◽

Hubble Space Telescope ◽

Simulated Data ◽

Minor Planet ◽

Minor Planets ◽

Space Telescope ◽

Orbit Correction ◽

Crossing Point

We have begun a program to establish a dynamical reference frame based on the motions of minor planets. The program will utilize observations from the Hubble Space Telescope, and will ultimately tie the HIPPARCOS reference system to a dynamical base. Thirty-four minor planets, 20 of which are suitable for observation with the Hubble Space Telescope, have been selected. Ground based observations, particularly crossing-point observations with long focus reflectors, have been initiated.A computer program to simultaneously solve for the corrections of the orbits of the 34 minor planets including the crossing-point observations, was successfully run. The observations are treated by the method of W. H. Jeffreys. Using simulated data, solutions with and without crossing point observations demonstrate the value of those observations to produce a homogeneous and coherent set of results.

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A Catalogue of QSOs and Link Stars for the HST link of the Hipparcos Reference Frame

Publications of the Astronomical Society of Australia ◽

10.1017/s1323358000023754 ◽

1990 ◽

Vol 8 (04) ◽

pp. 368-371 ◽

Cited By ~ 1

Author(s):

Graeme L. White ◽

David L. Jauncey ◽

John E. Reynolds ◽

David Malin ◽

A. N. Argue ◽

...

Keyword(s):

Data Base ◽

Reference Frame ◽

Hubble Space Telescope ◽

Space Telescope

AbstractWe present a list of bright (< 17 mag) southern QSOs and bright (< 11 mag) stars that may be suitable for theHubble Space Telescopelink between theHipparcosastrometric reference frame and the VLBI extragalactic frame. The QSOs have been selected from various lists of radio objects and identifications. The stars have been selected from the Strasbourg (CDS) data base and from the Preliminary Second Cape Photographic Catalogue, and supplemented with stars measured from the SERC IIIa-J Schmidt survey. The list of QSOs and stars have been included in theHipparcosandHSTschedule of observations.

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Using the Hubble Space Telescope to Relate the HIPPARCOS and Extragalactic Reference Frames

Symposium - International Astronomical Union ◽

10.1017/s0074180900134916 ◽

1988 ◽

Vol 129 ◽

pp. 335-336

Author(s):

P. D. Hemenway ◽

R. L. Duncombe

Keyword(s):

Reference Frame ◽

Solid Body ◽

Reference System ◽

Reference Frames ◽

Hubble Space Telescope ◽

Inertial Reference Frame ◽

Body Rotation ◽

Space Telescope ◽

Solid Body Rotation ◽

Instrumental System

The HIPPARCOS satellite will produce positions, motions and parallaxes of celestial objects with previously unattained accuracy. This HIPPARCOS Instrumental System, however, will have an unknown solid body rotation with respect to an inertial reference frame. One aspect of our program of astrometric observations with the Hubble Space Telescope is to determine the rotation of the HIPPARCOS reference frame with respect to an extragalactic reference system.

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