Zobrazeno 1 - 10
of 57
pro vyhledávání: '"W. Priedhorsky"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 350:1373-1384
We have made a series of snap-shot observations of 37 polars using XMM-Newton. We found that 16 of these systems were in a low, or much reduced, accretion state. Of those, 6 were not detected in X-rays. This suggests that in any survey of polars, aro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::932222abfa3be86231ed92d95437db11
https://doi.org/10.1111/j.1365-2966.2004.07732.x
https://doi.org/10.1111/j.1365-2966.2004.07732.x
Autor:
M. M. Michaelis, Herbert W. Friedman, E.V. George, G. Albrecht, James P. Reilly, Donald T. Gavel, John R. Murray, W. Priedhorsky, C. Ho, Claude R. Phipps
Publikováno v:
Scopus-Elsevier
When a large piece of space debris forced a change of flight plan for arecent U.S. Space Shuttle mission, the concept that we are trashing space as well as Earth finally attained broad public awareness. Almost a million pieces of debris have been gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::460283c608e0503afe85b112e3197904
https://doi.org/10.1017/s0263034600009733
https://doi.org/10.1017/s0263034600009733
Publikováno v:
Physical Review Letters. 47:1661-1664
The first measurements of high-energy x-ray emission ($h\ensuremath{\nu}\ensuremath{\sim}30\ensuremath{-}300$ keV) by high-$Z$ microballoon targets irradiated at $5\ifmmode\times\else\texttimes\fi{}{10}^{14}l\ensuremath{\phi}l2\ifmmode\times\else\tex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d8315a614007399e6622a9fa76c0a4ae
https://doi.org/10.1103/physrevlett.47.1661
https://doi.org/10.1103/physrevlett.47.1661
Autor:
W. Priedhorsky, D. Lier
Publikováno v:
Review of Scientific Instruments. 53:1189-1197
We describe a ten‐channel hard x‐ray spectrometer, named APACHE, which is used to diagnose target x‐ray spectra at the HELIOS 10.6‐μm laser fusion facility. Each channel consists of a filter, scintillator, and photodiode detector. Spectral b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9ec1e4adfbba9f06ca6b9e08af5e5d9
https://doi.org/10.1063/1.1137134
https://doi.org/10.1063/1.1137134
Autor:
W. Priedhorsky
Publikováno v:
AIP Conference Proceedings.
An epoxy replica of a test piece designed to simulte a Wolter x‐ray microscope geometry showed no loss of x‐ray refletivity or resolution, compared to the original. The test piece was a diamond‐turned cone with 1.5° half angle. A flat was fly
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ee1cc11e364621019aac2a698120b01a
https://doi.org/10.1063/1.33137
https://doi.org/10.1063/1.33137
Publikováno v:
The Astrophysical Journal. 314:266
A detailed analysis is presented of seven X-ray bursts from the X-ray source 4U/MXB 1820-30 in the globular cluster NGC 6624. The bursts were double-peaked, and recurred at almost equal time intervals of 3.2 hr. The persistent flux varied by only 10
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ca56346e73d10ce0cbde38fecca923dc
https://doi.org/10.1086/165056
https://doi.org/10.1086/165056
Autor:
Gordon P. Garmire, W. Priedhorsky, Richard E. Rothschild, S. S. Holt, P. J. Serlemitsos, E. A. Boldt
Publikováno v:
The Astrophysical Journal. 233:350
An energy- and time-resolved observation of Cyg X-1, sensitive from 0.15 to 20 keV, is reported which was performed to investigate the spectrum and time variability of the flux at low X-ray energies. Data in the band from 1.5 to 42 keV, obtained in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6047702526de1b7c2bb95bc0b4be257c
https://doi.org/10.1086/157396
https://doi.org/10.1086/157396
Publikováno v:
The Astrophysical Journal. 312:L17
The discovery of a coherent 685 s periodicity in the X-ray source 4U 1820 -30, which is located in the globular cluster NGC 6624, is reported. The modulation has a peak-to-peak amplitude of up to 3 percent and was independently detected in three obse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1286fb9dc45bf54c91ea883bebede33d
https://doi.org/10.1086/184811
https://doi.org/10.1086/184811
Publikováno v:
The Astrophysical Journal. 337:843
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f8eac39fa01a7344761f20493196139
https://doi.org/10.1086/167154
https://doi.org/10.1086/167154
Autor:
John Middleditch, W. Priedhorsky, Luigi Stella, Günther Hasinger, A. N. Parmar, N. E. White, Walter H. G. Lewin
Publikováno v:
The Astrophysical Journal. 306:L91
X-ray observations were made to follow up the discovery of quasi-periodic oscillations (QPO) in Sco X-1. The QPO is observed in the quiescent state, and between flares in the active state. When the source is quiescent, the QPO frequency is 6 Hz and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::81341d44c08be7ffbd16135836a53389
https://doi.org/10.1086/184712
https://doi.org/10.1086/184712