79 citations · 208 across the 13 of their papers we have counts for
5 papers · 1 filter
VLBI for Gravity Probe B. VII. The Evolution of the Radio Structure of IM Pegasi
M. F. Bietenholz, N. Bartel, D. E. Lebach +3
We present measurements of the total radio flux density as well as very-long-baseline interferometry (VLBI) images of the star, IM Pegasi, which was used as the guide star for the…
VLBI for Gravity Probe B. VI. The Orbit of IM Pegasi and the Location of the Source of Radio Emission
R. R. Ransom, N. Bartel, M. F. Bietenholz +4
We present a physical interpretation for the locations of the sources of radio emission in IM Pegasi (IM Peg, HR 8703), the guide star for the NASA/Stanford relativity mission Grav…
VLBI for Gravity Probe B. II. Monitoring of the Structure of the Reference Sources 3C 454.3, B2250+194, and B2252+172
R. R. Ransom, N. Bartel, M. F. Bietenholz +5
We used 8.4 GHz VLBI images obtained at up to 35 epochs between 1997 and 2005 to examine the radio structures of the main reference source, 3C 454.3, and two secondary reference so…
VLBI for Gravity Probe B. IV. A New Astrometric Analysis Technique and a Comparison with Results from Other Techniques
D. E. Lebach, N. Bartel, M. F. Bietenholz +7
When VLBI observations are used to determine the position or motion of a radio source relative to reference sources nearby on the sky, the astrometric information is usually obtain…
VLBI for Gravity Probe B. I. Overview
I. I. Shapiro, N. Bartel, M. F. Bietenholz +4
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…