Zobrazeno 1 - 10 of 12 pro vyhledávání: '"M. S. Barbour"'
2
Discovery of phase-locked variable polarization in an RS Canum Venaticorum-like star, HR 5110
Autor: M. S. Barbour, James C. Kemp
Publikováno v: The Astrophysical Journal. 246:203
Using measurements on 79 nights in 1980 January-August, it is established that the polarization in the ultraviolet (U band) varies synchronously on the known binary period of 2.6132 days, with a peak-to-peak amplitude of 0.03%. The pattern is mainly
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fe396c494fb5c3cb438e48a2651ae685
https://doi.org/10.1086/158912
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4
A photoelastic-modulator polarimeter at Pine Mountain Observatory
Autor: J. C. Kemp, M. S. Barbour
Publikováno v: Publications of the Astronomical Society of the Pacific. 93:521
The use of photoelastic polarimeters in astronomy is briefly reviewed, and a visible and near-UV photoelastic modulation polarimeter is described which has been in continuous service on the 61-cm telescope of Pine Mountain Observatory for 6 years. Th
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f86a30acd6a501d153900d7ebc639e9b
https://doi.org/10.1086/130870
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6
Discovery of synchronous binary polarization in Cygnus X-1
Autor: R. J. Rudy, James C. Kemp, M. S. Barbour, L. C. Herman
Publikováno v: The Astrophysical Journal. 220:L123
Using 180 nights of data from 1975 and 1977, we have found a stable polarization variation in the V band which is periodic on the orbital cycle of 5/sup d/.600. The peak-to-peak amplitude is 0.25% and is largely in the position-angle Stokes parameter
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da0360e0b55a0ec71253c3acd6d29d9e
https://doi.org/10.1086/182649
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8
SS 433 - Intensive 4 month light curves
Autor: Tsevi Mazeh, Elia M. Leibowitz, M. S. Barbour, James C. Kemp, M. Arbabi
Publikováno v: The Astrophysical Journal. 238:L133
Photometry covering 100 nights during 1979 July-November is reported, in an unfiltered band (effectively 5200-8000 A), in a V band, and with a few measures in B. Correlation with the 13 day period of Crampton, Cowley, and Hutchings is found in the fo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1795ceff5ebd651527e281646d7d7bb2
https://doi.org/10.1086/183273
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9
X Persei - Optical polarization variation on the 580 day binary-like period
Autor: J. C. Kemp, M. S. Barbour
Publikováno v: The Astrophysical Journal. 264:237
Observations of periodicities in the optical polarization of the weak X-ray source X Persei are reported. Polarization was measured in the V band 400 times over the course of 356 nights during 1977-1982. The Q and U Stokes parameters derived from the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a172324d85928f3dc3206ff7a997b8e0
https://doi.org/10.1086/160591
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10
Algol - A further study of the optical polarization
Autor: R. E. Mcbirney, M. S. Barbour, R. J. Rudy, James C. Kemp
Publikováno v: The Astrophysical Journal. 243:557
Results of a study of the phase-locked optical polarization of the Algol triple star system are presented. Polarimetry was obtained in the B filter during 75 nights from 1979 to 1980, and results were folded on the AB orbital period for the equatoria
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::956cb23e409ac779c9f8feb1e64bb7d2
https://doi.org/10.1086/158620
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