2012

VLBI for Gravity Probe B. I. Overview

Shapiro, I. I., Bartel, N., Bietenholz, M. F. et al.

Understand

We describe the NASA/Stanford gyroscope relativity mission, Gravity Probe B (GP-B), and provide an overview of the following series of six astrometric and astrophysical papers that report on our radio observations and analyses made in support of this mission.

The main goal of this 8.5 year program of differential VLBI astrometry was to determine the proper motion of the guide star of the GP-B mission, the RS CVn binary IM Pegasi (IM Peg; HR 8703).
This proper motion is determined with respect to compact, extragalactic reference sources.
The results are: -20.833 +- 0.090 mas/yr and -27.267 +- 0.095 mas/yr for, respectively, the right ascension and declination, in local Cartesian coordinates, of IM Peg's proper motion, and 10.370 +- 0.074 mas (i.e., 96.43 +- 0.69 pc) for its parallax (and distance).

Built on

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Lestrade, J., Preston, R. A., Jones, D. L., Phillips, R. B., Rogers, A. E. E., Titus, M. A., Rioja, M. J., & Gabuzda, D. C. 1999, A&A, 344, 1014
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Conklin, J. W., & the Gravity Probe B Collaboration. 2008, Journal of Physics Conference Series, 140, 012001
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Cited alongside, same era.
Ransom, R. R., Bartel, N., Bietenholz, M. F., Lebach, D. E., Lederman, J. I., Luca, P., Ratner, M. I., & Shapiro, I. I. 2012a, this issue (Paper II)
Cited in the paper.
Ransom, R. R., Bartel, N., Bietenholz, M. F., Lebach, D. E., Lestrade, J.-F., Ratner, M. I., & Shapiro, I. I. 2012b, this issue (Paper VI)
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Then

van Leeuwen, F. 2008, VizieR Online Data Catalog, 1311, 0
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Keiser, G. M., & Gravity Probe B Collaboration. 2009, in Atom Optics and Space Physics = Ottica atomica e fisica nello spazio. Published by IOS Press Amsterdam; Washington, DC, Series: Proceedings of the International School of Physics “Enrico Fermi”; course 168, ed. E. Arimondo, W. Ertmer, W. P. Schleich, & E. M. Rasel, 163
2009
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Petrov, L., Gordon, D., Gipson, J., MacMillan, D., Ma, C., Fomalont, E., Walker, R. C., & Carabajal, C. 2009, Journal of Geodesy, 83, 859, 0806.0167
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Everitt, C. W. F. et al. 2011, Phys. Rev. Lett., 106, 221101, 1105.3456
2011
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Bartel, N., Bietenholz, M. F., Lebach, D. E., Lederman, J. I., Petrov, L., Ransom, R. R., Ratner, M. I., & Shapiro, I. I. 2012, this issue (Paper III)
2012
Closest in time.
Bietenholz, M. F., Bartel, N., Lebach, D. E., Ransom, R. R., Ratner, M. I., & Shapiro, I. I. 2012, this issue (Paper VII)
2012
Closest in time.
Lebach, D. E. et al. 2012, this issue (Paper IV)
2012
Closest in time.
Ratner, M. I., Bartel, N., Bietenholz, M. F., Lebach, D. E., Lestrade, J.-F., Ransom, R. R., & Shapiro, I. I. 2012, this issue (Paper V)
2012
Closest in time.

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