Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Robert E. Fried"'
Autor:
Joseph Patterson, Tonny Vanmunster, Robert Rea, Jerry Gunn, David Harvey, Gianluca Masi, Marc Bos, Eve Armstrong, Berto Monard, Robert E. Fried, David R. Skillman, Neil Butterworth, Paul Warhurst, Greg Bolt, Jonathan Kemp, Jennie McCormick, Lewis M. Cook, Thomas Krajci, Jerry Foote, Lasse Jensen
Publikováno v:
Publications of the Astronomical Society of the Pacific. 117:1204-1222
We report on successes and failures in searching for positive superhumps in cataclysmic variables, and show the superhumping fraction as a function of orbital period. Basically, all short-period systems do, all long-period systems don't, and a 50% su
Autor:
Elena P. Pavlenko, Taichi Kato, Makoto Uemura, Marina Mitskevich, Sergei Yu. Shugarov, Yasuo Sano, Robert E. Fried
Publikováno v:
Publications of the Astronomical Society of Japan. 56:S147-S154
Wereport on our optical photometric observationsof ablack hole X-ray transient, XTE J1859+226 (=V406 Vul). We detected an optical reflare associated with an X-ray reflare about 50d after the outburst maximum. The X-ray delay of the reflare was shorte
Autor:
Ivan Hubeny, Paula Szkody, D. W. Hoard, Albert P. Linnell, Edward M. Sion, Michael A. Wolfe, Robert E. Fried
Publikováno v:
The Astrophysical Journal. 604:346-356
We have obtained the first far-ultraviolet spectrum of the novalike cataclysmic variable MV Lyrae using the Far Ultraviolet Spectroscopic Explorer. We also obtained contemporaneous optical light curves and spectra. All data are from a deep faint accr
Autor:
Delphine Porquet, Jean-Marc Bonnet-Bidaud, Evelyne Roueff, Steve B. Howell, Paula Szkody, M. Abada-Simon, D. de Martino, Martine Mouchet, Roger Ferlet, Klaus Beuermann, Koji Mukai, Boris T. Gänsicke, Robert E. Fried, Jean-Michel Desert
Publikováno v:
International Astronomical Union Colloquium. 190:142-148
We present far-UV spectra of the three magnetic cataclysmic variables (MCVs) BY Cam, V1309 Ori and AE Aqr obtained with the FUSE satellite. These MCVs have revealed strongly unusual NV and CIV UV resonance lines. The FUSE spectra exhibit broad OVI li
Autor:
William H. Fenton, Matt A. Wood, Greg Bolt, Jerry Foote, Robert Rea, David R. Skillman, Neil Butterworth, Edward Beshore, Berto Monard, Joseph Patterson, P. Niarchos, Darragh O'Donoghue, Brian Martin, Lewis M. Cook, David A. Harvey, John R. Thorstensen, Tonny Vanmunster, Robert E. Fried
Publikováno v:
Publications of the Astronomical Society of the Pacific. 114:1364-1381
We report the results of long observing campaigns on two novalike variables: V442 Ophiuchi and RX J1643.7+3402. These stars have high-excitation spectra, complex line profiles signifying mass loss at particular orbital phases, and similar orbital per
Publikováno v:
Publications of the Astronomical Society of the Pacific. 114:748-755
We obtained EUV photometry, optical spectroscopy, and multi-color optical photometry for WX Cet during its 1998 November superoutburst. WX Cet is only the second short-period, low mass transfer CV (TOAD) to ever be observed in the EUV. Our determined
Autor:
Stan Walker, David A. Harvey, Alon Retter, Jennie McCormick, Paddy McGee, Darragh O'Donoghue, David R. Skillman, Neil Butterworth, Fred Velthuis, Jonathan Kemp, Robert E. Fried, Lewis M. Cook, Joseph Patterson, Catherine Espaillat, Y. M. Lipkin, Robert Rea
Publikováno v:
Publications of the Astronomical Society of the Pacific. 114:65-73
We report photometry of the helium-dominated cataclysmic variable HP Librae during 1995-2001. The main photometric signal varies between 1118.89 and 1119.14 s, on a timescale of a few years, and displays a waveform characteristic of "superhumps." Aft
Publikováno v:
The Astronomical Journal. 121:2761-2768
We obtained ASCA observations of the cataclysmic variables LS Peg and T Leo in order to refine the X-ray characteristics of these two systems with unusual stream behaviors and to search for orbital features that might signify the presence of material
Autor:
Lewis M. Cook, Joseph Patterson, Lasse Jensen, John R. Thorstensen, Robert E. Fried, David R. Skillman
Publikováno v:
Publications of the Astronomical Society of the Pacific. 113:72-81
We report photometric and spectroscopic observations of the nova-like variable V751 Cygni. The radial velocities indicate an underlying binary period of 0.1445(2) day; the long-term cycle count is not firmly decided, but the best choice implies a per
Autor:
Tonny Vanmunster, Brian Martin, Lasse Jensen, Joseph Patterson, Jonathan Kemp, David R. Skillman, John R. Thorstensen, Robert E. Fried
Publikováno v:
Publications of the Astronomical Society of the Pacific. 112:1567-1583
We report photometric and spectroscopic observations of the eclipsing dwarf nova IY Ursae Majoris (=Takamizawa V85). During its 2000 January superoutburst, the star flashed superhumps with a period of 0.07583 day, 2.6% longer than the true orbital pe