Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Laurence W. Fredrick"'
Autor:
O. G. Franz, R. J. Patterson, Barbara McArthur, T. E. Harrison, W. F. van Altena, Lawrence H. Wasserman, Arthur J. Bradley, Michael F. Skrutskie, Thomas J. Montemayor, G. Fritz Benedict, E. P. Nelan, D. Story, Peter J. Shelus, Raynor L. Duncombe, J. Rhee, William H. Jefferys, Arthur L. Whipple, P. D. Hemenway, C. L. Slesnick, Laurence W. Fredrick
Publikováno v:
The Astronomical Journal. 126:2549-2556
We present an absolute parallax and relative proper motion for the central star of the planetary nebula NGC 6853 (The Dumbell). We obtain these with astrometric data from FGS 3, a white-light interferometer on {\it HST}. Spectral classifications and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2794572a830b0461990196ae16b705c
https://doi.org/10.1086/378603
https://doi.org/10.1086/378603
Autor:
D. Story, W. F. van Altena, G. Fritz Benedict, Arthur L. Whipple, Arthur J. Bradley, T. E. Harrison, E. P. Nelan, Barbara McArthur, Michael F. Skrutskie, Peter J. Shelus, William H. Jefferys, P. D. Hemenway, Raynor L. Duncombe, Lawrence H. Wasserman, J. Rhee, C. L. Slesnick, Laurence W. Fredrick, O. G. Franz, Richard J. Patterson
Publikováno v:
The Astronomical Journal. 124:1695-1705
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator, delta Cep. We obtain these with astrometric data from FGS 3, a white-light interferometer on HST. Utilizing spectrophotometric estimates of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90646ff3b91cdc1f26fab2dead848689
https://doi.org/10.1086/342014
https://doi.org/10.1086/342014
Autor:
Arthur J. Bradley, Raynor L. Duncombe, J. Rhee, C. L. Slesnick, Laurence W. Fredrick, Richard J. Patterson, Arthur L. Whipple, Otto G. Franz, D. Story, Peter J. Shelus, G. Fritz Benedict, W. F. van Altena, Barbara McArthur, William H. Jefferys, P. D. Hemenway, E. Nelan, Thomas E. Harrison, J. T. Lee, Lawrence H. Wasserman
Publikováno v:
The Astronomical Journal. 123:473-484
We present an absolute parallax and relative proper motion for the fundamental distance scale calibrator � Cep. We obtain these with astrometric data from FGS 3, a white-light interferometer on the Hubble Space Telescope (HST). Utilizing spectropho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14e8b32832637f60b5c7f796977e68ef
https://doi.org/10.1086/338087
https://doi.org/10.1086/338087
Autor:
Laurence W. Fredrick, Raynor L. Duncombe, W. F. van Altena, William H. Jefferys, William Spiesman, D. Story, Barbara McArthur, Arthur J. Bradley, Edward L. Robinson, O. G. Franz, P. D. Hemenway, G. F. Benedict, Lawrence H. Wasserman, J. T. Lee, E. P. Nelan, Peter J. Shelus, Arthur L. Whipple
Publikováno v:
The Astronomical Journal. 119:2382-2390
With HST FGS 3 we have determined a parallax for the white dwarf - M dwarf interacting binary, Feige 24. The white dwarf (DA) component has an effective temperature, T_eff of approximately 56,000 K degrees. A weighted average with past parallax deter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ec4e89ad6df5a7e0d4855f68ed8b52b1
https://doi.org/10.1086/301355
https://doi.org/10.1086/301355
Autor:
Otto G. Franz, Barbara McArthur, Peter J. Shelus, L. H. Wasserman, Terrence M. Girard, W. F. van Altena, Laurence W. Fredrick, Constantine P. Deliyannis, George F Benedict, John T. Lee, P. D. Hemenway, E. Nelan, Raynor L. Duncombe, William H. Jefferys, C. L. Lu
Publikováno v:
The Astrophysical Journal. 520:L59-L62
RW Triangulum (RW Tri) is a 13th magnitude Nova-like Cataclysmic Variable star with an orbital period of 0.2319 days (5.56 hours). Infrared observations of RW Tri indicate that its secondary is most likely a late K-dwarf. Past analyses predicted a di
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d99503f3701f433aded5642c20182512
https://doi.org/10.1086/312135
https://doi.org/10.1086/312135
Autor:
Barbara McArthur, Raynor L. Duncombe, J. Davy Kirkpatrick, Donald W. McCarthy, D. Story, A. L. Whipple, William F. van Altena, Peter J. Shelus, Arthur J. Bradley, G. Fritz Benedict, P. D. Hemenway, Laurence W. Fredrick, William H. Jefferys, Otto G. Franz, Lawrence H. Wasserman, Todd J. Henry, Edmund P. Nelan, Philip A. Ianna
Publikováno v:
The Astronomical Journal. 116:1432-1439
The M dwarf binary, Wolf 1062 (Gliese 748), has been observed with the Hubble Space Telescope (HST) Fine Guidance Sensor 3 in the transfer function scan mode to determine the apparent orbit. This is the first orbit defined fully and exclusively with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a0b90ff5bc8ee1dc92a6dd8aabbc4b5
https://doi.org/10.1086/300500
https://doi.org/10.1086/300500
Autor:
Raynor L. Duncombe, Arthur L. Whipple, D. Story, Laurence W. Fredrick, William H. Jefferys, P. D. Hemenway, Wm. F. van Altena, E. P. Nelan, Peter J. Shelus, G. Fritz Benedict, Lawrence H. Wasserman, Otto G. Franz, Barbara McArthur
Publikováno v:
The Astronomical Journal. 116:429-439
We have observed Proxima Centauri and Barnard's Star with Hubble Space Telescope Fine Guidance Sensor 3. Proxima Centauri exhibits small-amplitude, periodic photometric variations. Once several sources of systematic photometric error are corrected, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3652137970b320baa4f742d3112f95ea
https://doi.org/10.1086/300420
https://doi.org/10.1086/300420
Autor:
O. G. Franz, Arthur L. Whipple, J. Whitney, D. Story, E. P. Nelan, G. F. Benedict, Barbara McArthur, Peter J. Shelus, T. Gerard, J. McCartney, Laurence W. Fredrick, W. F. van Altena, P. D. Hemenway, Larry Wasserman, Raynor L. Duncombe, William H. Jefferys
Publikováno v:
International Astronomical Union Colloquium. 127:68-76
The Fine Guidance Sensors (FGSs) are the instrument of choice for most astrometric measurements with the Hubble Space Telescope (HST). The observed amount of spherical aberration in the Ritchey Chretien optical system does not affect positional measu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecb3abde3a586355345c75ee8aa9fa62
https://doi.org/10.1017/s0252921100063582
https://doi.org/10.1017/s0252921100063582
Autor:
D. Cornell, Barbara McArthur, G. Fritz Benedict, P. D. Hemenway, D. Story, Lawrence H. Wasserman, William H. Jefferys, David Chappell, E. P. Nelan, Peter J. Shelus, Raynor L. Duncombe, J. T. Lee, Otto G. Franz, Arthur L. Whipple, W. F. van Altena, Laurence W. Fredrick
We report on a sub-stellar companion search utilizing interferometric fringe-tracking astrometry acquired with Fine Guidance Sensor 3 (FGS 3) on the Hubble Space Telescope. Our targets were Proxima Centauri and Barnard's Star. We obtain absolute para
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1103e9f617527b8e6d7ca9461945aa97
