Now showing items 18160-18179 of 18296

    • X-CAPM: An Extrapolative Capital Asset Pricing Model 

      Barberis, Nicholas; Greenwood, Robin Marc; Jin, Lawrence; Shleifer, Andrei (National Bureau of Economic Research, 2013)
      Survey evidence suggests that many investors form beliefs about future stock market returns by extrapolating past returns. Such beliefs are hard to reconcile with existing models of the aggregate stock market. We study a ...
    • X-ray absorption and re-emission from an ionized outflow in the Type 1 quasi-stellar object 2MASS 234449+1221 observed by XMM-Newton 

      Pounds, K. A.; Wilkes, Belinda Jane; Page, K. L. (Oxford University Press (OUP), 2005)
      We report on the analysis of a short XMM-Newton observation of the reddened Type 1 QSO 2MASS 234449+1221 first identified in the Two Micron All-Sky Survey. The underlying X-ray continuum is found to be typical of a broad-line ...
    • X-Ray Absorption by the Hot Intergalactic Medium 

      Perna, Rosalba; Loeb, Abraham (American Astronomical Society, 1998)
      The current census of observed baryons in the local universe is still missing a significant fraction of them according to standard big bang nucleosynthesis. Numerical simulations predict that most of the missing baryons ...
    • X-ray absorption toward the red quasar 3C 212 

      Elvis, Martin S.; Fiore, Fabrizio; Mathur, Smita; Wilkes, Belinda Jane (IOP Publishing, 1994)
      A Roentgen Satellite (ROSAT) X-ray spectrum of the z = 1.049 'red quasar' 3C 212 has a strong low-energy cutoff. The spectrum can be fitted with a power law (of energy index 1.4(+0.8, -0.6) with low-energy photoelectric ...
    • X-ray and Ellipsometric Studies of Self-Assembled Monolayers of Fluorinated Chlorosilanes 

      Geer, R. E.; Stenger, D. A.; Chen, M. S.; Calvert, J. M.; Shashidhar, R.; Jeong, Y. H.; Pershan, Peter S. (American Chemical Society, 1994)
      Results of X-ray and ellipsometric studies on self-assembled monolayer films of three fluorinated chlorosilanes are presented. By inferring an index of refraction, the monolayer thicknesses obtained from both these types ...
    • X-ray and optical continua of active galactic nuclei with extreme Fe II emission 

      Lawrence, A.; Elvis, Martin S.; Wilkes, Belinda Jane; McHardy, I.; Brandt, N. (Oxford University Press (OUP), 1997)
      We present the results of ROSAT PSPC observations of three active galactic nuclei (AGN) with extremely strong Fe ii emission (PHL 1092, IRAS 07598 + 6508 and I Zw 1) and two AGN with very weak Fe ii emission (Mrk 10 and ...
    • X-Ray and Optical Studies of the Thickness Dependence of the Phase Diagram of Liquid-Crystal Films 

      Sirota, E. B.; Pershan, Peter S.; Sorensen, L. B.; Collett, J. (American Physical Society, 1987)
      A comprehensive study of the thickness dependence of the phase diagram of freely suspended films of the liquid crystal 4-n-heptyloxybenzylidene-4-n-heptylaniline (7O.7) between \(50 and 69^{\circ}C\) is reported. In thick ...
    • The X-ray and ultraviolet absorbing outflow in 3C 351 

      Mathur, Smita; Wilkes, Belinda Jane; Elvis, Martin S.; Fiore, Fabrizio (IOP Publishing, 1994)
      3C 351 (z = 0.371), and X-ray-'quiet' quasar, is one of the few quasars showing signs of a 'warm absorber' in its X-ray spectrum; i.e., partially ionized absorbing material in the line of sight whose opacity depends on its ...
    • X-RAY BINARIES IN THE ULTRAHIGH ENCOUNTER RATE GLOBULAR CLUSTER NGC 6388 

      Maxwell, J. Edward; Lugger, Phyllis M.; Cohn, Haldan N.; Heinke, Craig O.; Grindlay, Jonathan E.; Budac, Sonia A.; Drukier, Gordon A.; Bailyn, Charles D. (American Astronomical Society, 2012)
      We report the results of a joint Chandra Hubble Space Telescope study of the X-ray binary (XRB) population in the massive, high-density globular cluster NGC 6388. NGC 6388 has one of the highest predicted XRB production ...
    • X-ray Crystal Structure of ERK5 (MAPK7) in Complex with a Specific Inhibitor 

      Elkins, Jonathan M.; Wang, Jing; Deng, Xianming; Pattison, Michael J.; Arthur, J. Simon C.; Erazo, Tatiana; Gomez, Nestor; Lizcano, Jose M.; Gray, Nathanael S.; Knapp, Stefan (American Chemical Society, 2013)
      The protein kinase ERK5 (MAPK7) is an emerging drug target for a variety of indications, in particular for cancer where it plays a key role mediating cell proliferation, survival, epithelial–mesenchymal transition, and ...
    • X-Ray Emission from the First Quasars 

      Haiman, Zoltan; Loeb, Abraham (American Astronomical Society, 1999)
      It is currently unknown whether the universe was reionized by quasars or stars at z greater than or similar to 5. We point out that quasars can be best distinguished from stellar systems by their X-ray emission. Based on ...
    • X-Ray Evanescent-Wave Absorption and Emission 

      Becker, R. S.; Golovchenko, Jene Andrew; Patel, J. R. (American Physical Society (APS), 1983)
      The presence and properties of x-ray evanescent waves are demonstrated detecting their absorption and their excitation in the vicinity of a target surface. The role of microscopic reversibility in relating the two cases ...
    • X-ray flare candidates in short gamma-ray bursts 

      Margutti, R; Chincarini, G.; Granot, J.; Guidorzi, C.; Berger, Edo; Bernardini, M. G.; Gehrels, N.; Soderberg, Alicia M.; Stamatikos, M.; Zaninoni, E. (Oxford University Press (OUP), 2011)
      We present the first systematic study of X-ray flare candidates in short gamma-ray bursts (SGRBs) exploiting the large 6-year Swift database with the aim to constrain the physical nature of such fluctuations. We find that ...
    • X-Ray Grazing Incidence Diffraction from Alkylsiloxane Monolayers on Silicon Wafers 

      Tidswell, I. M.; Rabedeau, T. A.; Pershan, Peter S.; Kosowsky, S. D.; Folkers, J. P.; Whitesides, George M. (American Institute of Physics, 1991)
      X‐ray reflection (both specular and off‐specular) and grazing incidence diffraction (GID) have been used to study the structure of alkylsiloxane monolayers (\(n‐C_{18}H_{37}SiO_{1.5}\)) formed by self‐assembly from solution ...
    • X-ray Induced Electrostatic Charging of Helium Films 

      Penanen, K.; Pershan, Peter S.; Regan, M. J.; Silvera, Issac F. (Springer Verlag, 1995)
      It is well known that free electrons can be held onto the free surface of liquid helium through either their own image charges or through the effect of an externally applied electric field. The resultant electrostatic ...
    • X-ray Luminosity and Absorption Column Fluctuations in the H2O Maser Galaxy NGC 4258 from Weeks to Years 

      Fruscione, Antonella; Greenhill, Lincoln Jared; Filippenko, Alexei V.; Moran, James M.; Herrnstein, James R.; Galle, Elizabeth (IOP Publishing, 2005)
      We report monitoring of the 0.3–10 keV spectrum of NGC 4258 with the the XMM-Newton Observatory at five epochs over 1.5 years. We also report reprocessing of an overlapping four-epoch series of archival Chandra observations ...
    • X-Ray Measurements of Noncapillary Spatial Fluctuations from a Liquid Surface 

      Fukumo, M.; Heilmann, R. K.; Pershan, Peter S.; Griffiths, J. A.; Yu, S. M.; Tirrell, D. A. (American Physical Society, 1998)
      Off-specular diffuse x-ray scattering measurements on both pure water and a homogeneous Langmuir monolayer of poly- γ-benzyl- L-glutamate (PBLG) on water establish the validity of a proposed sum rule for scattering from ...
    • X-ray monochromator system for use with synchrotron radiation sources 

      Golovchenko, Jene Andrew; Levesque, R.A.; Cowan, P. L. (AIP Publishing, 1981)
      A double crystal x‐ray monochromator system has been developed for use on synchrotron radiationsources. The system consists of two separate Bragg reflecting crystals constrained by a mechanical linkage system enabling it ...
    • X-Ray or Neutron Reflectivity: Limitations in the Determination of Interfacial Profiles 

      Pershan, Peter S. (American Physical Society, 1994)
      Although there are an increasing number of proposals for model independent methods by which an index of refraction profile can be extracted from either x-ray or neutron reflectivity data, for many systems there are fundamental ...
    • X-ray polarimetry with the Polarization Spectroscopic Telescope Array (PolSTAR) 

      Krawczynski, Henric S.; Stern, Daniel; Harrison, Fiona A.; Kislat, Fabian F.; Zajczyk, Anna; Beilicke, Matthias; Hoormann, Janie; Guo, Qingzhen; Endsley, Ryan; Ingram, Adam R.; Miyasaka, Hiromasa; Madsen, Kristin K.; Aaron, Kim M.; Amini, Rashied; Baring, Matthew G.; Beheshtipour, Banafsheh; Bodaghee, Arash; Booth, Jeffrey; Borden, Chester; Böttcher, Markus; Christensen, Finn E.; Coppi, Paolo S.; Cowsik, Ramanath; Davis, Shane; Dexter, Jason; Done, Chris; Dominguez, Luis A.; Ellison, Don; English, Robin J.; Fabian, Andrew C.; Falcone, Abe; Favretto, Jeffrey A.; Fernández, Rodrigo; Giommi, Paolo; Grefenstette, Brian W.; Kara, Erin; Lee, Chung H.; Lyutikov, Maxim; Maccarone, Thomas; Matsumoto, Hironori; McKinney, Jonathan; Mihara, Tatehiro; Miller, Jon M.; Narayan, Ramesh; Natalucci, Lorenzo; Özel, Feryal; Pivovaroff, Michael J.; Pravdo, Steven; Psaltis, Dimitrios; Okajima, Takashi; Toma, Kenji; Zhang, William W. (Elsevier, 2016)
      This paper describes the Polarization Spectroscopic Telescope Array (PolSTAR), a mission proposed to NASA's 2014 Small Explorer (SMEX) announcement of opportunity. PolSTAR measures the linear polarization of 3-50 keV ...