Výsledky vyhledávání - "W.F. van Altena"

Image Detection, Characterization and Classification, and the Future Role of CCDS in Wide-Field Astrometry

Autor: W.F. van Altena

Publikováno v: Symposium - International Astronomical Union. 161:193-203

The extraction and characterisation of information from photographic emulsions is the subject of this review. Since the major Schmidt Telescope full sky surveys form the bulk of the photographic emulsions currently under intensive study, I will limit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e94a986eba4ea4cb8cccf9d6fa034c65
https://doi.org/10.1017/s007418090004732x

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Pickles: A Wide-Field Imaging Tool

Autor: L.W. Fredrick, G.F. Benedict, R. Duncombe, O.G. Franz, P.D. Hemenway, W.H. Jeffreys, B. McArthur, J. McCartney, E. Nelan, P.J. Shelus, D. Story, A.L. Whipple, W.F. van Altena

Publikováno v: Symposium - International Astronomical Union. 161:356-358

The program Pickles was developed as an aid for planning HST observations using the Space Telescope Science Institute's Guide Star Catalogue, which was generated from wide-field Schmidt plates. Pickles reads the catalogue from CD-ROM and then display

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::744651bf5486133f551ba23ae4580a1a
https://doi.org/10.1017/s0074180900047641

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Wading Through the Quagmire of Schmidt-Plate Coordinate Systematics

Autor: C.-L Lu, I. Platais, T.M. Girard, V. Kozhurina-Platais, W.F. Van Altena, C.E. López, D.G. Monet

Publikováno v: Symposium - International Astronomical Union. 179:384-385

We attempted to quantify the magnitude-dependent systematics in a sample of Schmidt plates by comparison to positions from the Yale/San Juan Southern Proper Motion program which offers star positions and absolute proper motions down to B = 18 with a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fd0bdce3bd2305156227a7743d5bdc31
https://doi.org/10.1017/s0074180900129109

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Proper Motions in the Bulge: Looking Through Plaut's Low Extinction Window

Autor: R.A. Méndez, R.M. Rich, W.F. Van Altena, T.M. Girard, S. Van Den Bergh, S.R. Majewski

Publikováno v: Symposium - International Astronomical Union. 179:223-224

We are conducting the deepest and largest photographic proper-motion survey ever undertaken of the Galactic bulge. Our first-epoch plate material (from 1972-3) goes deep enough (Vlim ∼ 22) to reach below the bulge main-sequence turnoff. These plate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5090512ad1ff0e16642f162db96faf6a
https://doi.org/10.1017/s0074180900128633

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Binary Star Astrometry with the Hubble Space Telescope: One Millisecond of ARC Accuracy and Beyond

Autor: O. Franz, K.J. Kreidl, L.H. Wasserman, A.J. Bradley, G.F. Benedict, R.L. Duncombe, P.D. Hemenway, W.H. Jefferys, B. McArthur, E. Nelan, P.J. Shelus, D. Story, A.L. Whipple, L.W. Fredrick, W.F. Van Altena

Publikováno v: Symposium - International Astronomical Union. 166:87-87

We briefly review the concept of double star measurement with HST Fine Guidance Sensors (FGS) in the Transfer Function (TF) Scan mode and give results for three calibration binaries observed with FGS3. Agreement among multiple observations indicates

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bde35b8aeb533ea13ab3afea8e8b6b9e
https://doi.org/10.1017/s0074180900227897

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Astrometry of Large Sky Surveys

Autor: W.F. Van Altena, T.M. Girard, I. Platais

Publikováno v: Symposium - International Astronomical Union. 166:43-43

One of the major uses of the Large Sky Surveys such as the Palomar and SERC Schmidt Surveys is the derivation of positions for faint objects discovered in the course of other surveys. The HST Guide Star Catalogue has proved to be of great help in der

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::44235039ce6fe9ca47ab92d5d33e0c61
https://doi.org/10.1017/s0074180900227812

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HST in Search of Binaries among Faint Members of the Hyades Cluster

Publikováno v: Symposium - International Astronomical Union. 166:203-203

The HST Astrometry Science Team is using the Fine Guidance Sensors (FGS) in the Transfer Function (TF) Scan mode to search for binaries among the faint members of the Hyades cluster. To date (March 1994), nine binaries have been discovered among 24 s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b9b57c3e2b2efe20a11fc5d355bcb8f5
https://doi.org/10.1017/s0074180900228076

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