MS Word - Boston University
... The ISEE-1 satellite has observed butterfly pitch angle distributions (PAD) in protons and electrons from 20 keV to 2 MeV in the low latitude outer magnetosphere, which showed a sharp dropout in the flux of 90-degree pitch angle particles. These distributions were present on the night side near the ...
... The ISEE-1 satellite has observed butterfly pitch angle distributions (PAD) in protons and electrons from 20 keV to 2 MeV in the low latitude outer magnetosphere, which showed a sharp dropout in the flux of 90-degree pitch angle particles. These distributions were present on the night side near the ...
Sample pages 1 PDF
... via the optically thick and geometrically thin accretion disk, whereas closer to the compact object the accretion disk is transformed into a hot optically thin and geometrically thick flow with the aspect ratio of H/R∼0.5–1. The soft (optically thick) and hard (optically thin) spectral components ar ...
... via the optically thick and geometrically thin accretion disk, whereas closer to the compact object the accretion disk is transformed into a hot optically thin and geometrically thick flow with the aspect ratio of H/R∼0.5–1. The soft (optically thick) and hard (optically thin) spectral components ar ...
SGR 1900+14
... GRB prompt emission peak fluxes: 10-8-10-3 ergs/cm2 s X-ray afterglows of long bursts: ~10-11 – 10-13 ergs/cm2 s Previous giant flares: ~10-3 ergs/cm2 s Typical SGR bursts: 10-9 – 10-6 ergs/cm2 s ...
... GRB prompt emission peak fluxes: 10-8-10-3 ergs/cm2 s X-ray afterglows of long bursts: ~10-11 – 10-13 ergs/cm2 s Previous giant flares: ~10-3 ergs/cm2 s Typical SGR bursts: 10-9 – 10-6 ergs/cm2 s ...
SNEWS - University of Minnesota
... • Vesta (mag 6.7) was at a stationary point in its retrograde loop in the given error box – Not a regular star, not moving ...
... • Vesta (mag 6.7) was at a stationary point in its retrograde loop in the given error box – Not a regular star, not moving ...
THE LUMINOSITY FUNCTION OF X
... Over more than two decades, X-ray surveys have been improving and extending the known AGN luminosity function by including sources at low luminosity, with or without optical emission lines, and hidden by a dense obscuring medium. The Extended Medium Sensitivity Survey (Gioia et al. 1990) was one of ...
... Over more than two decades, X-ray surveys have been improving and extending the known AGN luminosity function by including sources at low luminosity, with or without optical emission lines, and hidden by a dense obscuring medium. The Extended Medium Sensitivity Survey (Gioia et al. 1990) was one of ...
Charged-Particle Probing of X-Ray-Driven Inertial-Fusion Implosions PSFC/JA-10-29
... J. P. Knauer4, D. D. Meyerhofer4, C. A. Back5, J. D. Kilkenny5 and A. Nikroo5 The first measurements of x-ray driven implosions with charged particles have resulted in unique and quantitative characterization of critical aspects of indirect-drive inertial fusion. Three types of spontaneous electric ...
... J. P. Knauer4, D. D. Meyerhofer4, C. A. Back5, J. D. Kilkenny5 and A. Nikroo5 The first measurements of x-ray driven implosions with charged particles have resulted in unique and quantitative characterization of critical aspects of indirect-drive inertial fusion. Three types of spontaneous electric ...
Neutrino Physics and Astrophysics with SuperKamiokande Jordan A
... experiments and from the global fit. The Earth effect is included for both timeaveraged and day/night asymmetry data, full astrophysical and nuclear physics uncertainties and their correlations are accounted for, and a joint statistical analysis is carried out. The region excluded by the Kamiokande ...
... experiments and from the global fit. The Earth effect is included for both timeaveraged and day/night asymmetry data, full astrophysical and nuclear physics uncertainties and their correlations are accounted for, and a joint statistical analysis is carried out. The region excluded by the Kamiokande ...
pix_get_grating_wavelength Synopsis Syntax Description
... Calculates the wavelength, in Angstrom, for a given grating position and using the current pixlib settings. The x and y values are in the GAC coordinate system, and so represent the grating dispersion and cross−dispersion angles in degrees. The grating order − as set by pix_set_grating() − must be n ...
... Calculates the wavelength, in Angstrom, for a given grating position and using the current pixlib settings. The x and y values are in the GAC coordinate system, and so represent the grating dispersion and cross−dispersion angles in degrees. The grating order − as set by pix_set_grating() − must be n ...
Eric Feng - Physics 335 Poster
... from the high gain output boosted the gain by a factor of 64. The number of photoelectrons produced per MIP and the signal-to-noise ratios for the MBTS counter will be incorporated in the GEANT full simulation in the future. These will be used along with the expected charged multiplicity to set requ ...
... from the high gain output boosted the gain by a factor of 64. The number of photoelectrons produced per MIP and the signal-to-noise ratios for the MBTS counter will be incorporated in the GEANT full simulation in the future. These will be used along with the expected charged multiplicity to set requ ...
Pre-flight integration and characterization of the SPIDER balloon
... The past twenty years have seen the field of cosmology expand at a rapid pace, from the first hints of anisotropies in the Cosmic Microwave Background (CMB) detected by COBE,1 to precision tests of the Standard Cosmological Model by the latest generation of CMB experiments2–8 and complementary datas ...
... The past twenty years have seen the field of cosmology expand at a rapid pace, from the first hints of anisotropies in the Cosmic Microwave Background (CMB) detected by COBE,1 to precision tests of the Standard Cosmological Model by the latest generation of CMB experiments2–8 and complementary datas ...
ASP2011_2007 - users.monash.edu.au
... molecules which readily absorb light with E field parallel to the molecule's long axis. ...
... molecules which readily absorb light with E field parallel to the molecule's long axis. ...
Accretion Processes of Binaries of White Dwarfs
... 2. SPH simulations show that steady accretion disk can be formed via gravitational capture of slow stellar wind ...
... 2. SPH simulations show that steady accretion disk can be formed via gravitational capture of slow stellar wind ...
Observations
... (2) A Jovian radiation belt study of Jupiter’s synchrotron emission involving Cassini (Radar instrument), the Very Large Array (VLA), and the Deep Space Network (DSN). The slow approach and departure offer the opportunity for the Cassini optical remote sensing instruments to assemble a time-lapse mo ...
... (2) A Jovian radiation belt study of Jupiter’s synchrotron emission involving Cassini (Radar instrument), the Very Large Array (VLA), and the Deep Space Network (DSN). The slow approach and departure offer the opportunity for the Cassini optical remote sensing instruments to assemble a time-lapse mo ...
X(4) - CMS DocDB Server
... so hits are time-stamped on the chip and sent to the read-out system. • All the BTeV ROCs are synchronized with a 2 MHz clock (500ns) in order to get the same timestamp from the hits generated when a particle passes. • The CMS chip is triggered by two scintillators and hits are time stamped in the r ...
... so hits are time-stamped on the chip and sent to the read-out system. • All the BTeV ROCs are synchronized with a 2 MHz clock (500ns) in order to get the same timestamp from the hits generated when a particle passes. • The CMS chip is triggered by two scintillators and hits are time stamped in the r ...
Gamma Ray Burst Sensitivity
... Requires GRBs to more energetic phenomena Different timescale of low and high energy implies an evolving source environment or different high energy particles Shape of high energy component applies tight constraints to ambient densities and magnetic fields Or evidence of origin of Ultra High Energy ...
... Requires GRBs to more energetic phenomena Different timescale of low and high energy implies an evolving source environment or different high energy particles Shape of high energy component applies tight constraints to ambient densities and magnetic fields Or evidence of origin of Ultra High Energy ...
Jul y 9- 11,
... X-ray sources detected down to few times 1032 erg/s in fields with young ( 100 Myr) stellar populations of different ages. With these data we will a) derive the deepest X-ray luminosity functions for X-ray binaries (XRBs) in a low metallicity (0.2Zd ) star-forming galaxy, b) study how accreting XRB ...
... X-ray sources detected down to few times 1032 erg/s in fields with young ( 100 Myr) stellar populations of different ages. With these data we will a) derive the deepest X-ray luminosity functions for X-ray binaries (XRBs) in a low metallicity (0.2Zd ) star-forming galaxy, b) study how accreting XRB ...
MULTI-FREQUENCY TIME VARIABILITY OF ACTIVE GALACTIC NUCLEI RITABAN CHATTERJEE
... and “may be also after that.” It read, “Welcome to the Blazar group, Ritaban”, and in the next five years I never hesitated to knock on his door. He was always there. At first, to answer my questions, then, as time went by, to direct me to the idea instead of giving a simple answer, and toward the e ...
... and “may be also after that.” It read, “Welcome to the Blazar group, Ritaban”, and in the next five years I never hesitated to knock on his door. He was always there. At first, to answer my questions, then, as time went by, to direct me to the idea instead of giving a simple answer, and toward the e ...
Gamma-ray burst has highest redshift yet seen
... from the 8-m Gemini North telescope that the new GRB’s redshift was about 8, clearly a record! By then dawn was breaking over Hawaii, so IR spectroscopy had to wait for nightfall at large telescopes in Chile and the Canaries.3 Together with the earlier photometry, the IR spectra yielded z = 8.26 ± 0 ...
... from the 8-m Gemini North telescope that the new GRB’s redshift was about 8, clearly a record! By then dawn was breaking over Hawaii, so IR spectroscopy had to wait for nightfall at large telescopes in Chile and the Canaries.3 Together with the earlier photometry, the IR spectra yielded z = 8.26 ± 0 ...
Gamma-Ray Pulsars - INTEGRAL
... the attention of the astronomical community. The first high-energy γ-ray maps of the Galaxy (SAS-2, Fichtel et al.,1975; COS-B, Mayer-Hasselwander et al., 1982) are dominated by the sources now known as the young pulsars Crab, Vela and Geminga. Unlike in any other waveband these young pulsars outshi ...
... the attention of the astronomical community. The first high-energy γ-ray maps of the Galaxy (SAS-2, Fichtel et al.,1975; COS-B, Mayer-Hasselwander et al., 1982) are dominated by the sources now known as the young pulsars Crab, Vela and Geminga. Unlike in any other waveband these young pulsars outshi ...
The XXL Survey - I. Scientific motivations − XMM
... temperature, gas mass or the thermal energy via the Yx parameter (Allen et al. 2011) can be used. Alternatively, basic signal measurements like X-ray colours and count-rates can be used exclusively and have the merit of being determined independently of a reference cosmology (Clerc et al. 2012). Thi ...
... temperature, gas mass or the thermal energy via the Yx parameter (Allen et al. 2011) can be used. Alternatively, basic signal measurements like X-ray colours and count-rates can be used exclusively and have the merit of being determined independently of a reference cosmology (Clerc et al. 2012). Thi ...
Large Area Hybrid Photodiodes
... R5900/64 is under investigation [29,30]. In this case an additional lens system as well as minor modifications of the tube design are necessary in order to reach a sufficiently high surface coverage. 4.3. The 5-inch pad HPD project The HPD, as shown in Fig. 8, consists of a cylindrical vacuum glass ...
... R5900/64 is under investigation [29,30]. In this case an additional lens system as well as minor modifications of the tube design are necessary in order to reach a sufficiently high surface coverage. 4.3. The 5-inch pad HPD project The HPD, as shown in Fig. 8, consists of a cylindrical vacuum glass ...
Chapter 5 Stellar Energy Production
... by a ∆E ·∆t ≃ h̄ uncertainty principle argument. • Conversely, states with long decay lifetimes (small decay rates) correspond to narrow resonances. The limiting case is a state that is completely stable, which then corresponds to a vanishing decay rate and has a sharply defined energy. • The factor ...
... by a ∆E ·∆t ≃ h̄ uncertainty principle argument. • Conversely, states with long decay lifetimes (small decay rates) correspond to narrow resonances. The limiting case is a state that is completely stable, which then corresponds to a vanishing decay rate and has a sharply defined energy. • The factor ...
Gamma-Ray Bursts
... If we assume isotropic emission, the GRB would have to emit the same energy in all directions. For beamed GRBs, it’s only along the beams => Less total energy ...
... If we assume isotropic emission, the GRB would have to emit the same energy in all directions. For beamed GRBs, it’s only along the beams => Less total energy ...
Polarization of x-gamma radiation produced by a Thomson and
... measurements of the parity of the nuclear states, for the investigation of pygmy resonances and of the photodisintegration reactions. Measurements of the gamma polarization are usually done by analyzing the intensity spatial distribution detected on imaging plates [32]. Furthermore, the polarization ...
... measurements of the parity of the nuclear states, for the investigation of pygmy resonances and of the photodisintegration reactions. Measurements of the gamma polarization are usually done by analyzing the intensity spatial distribution detected on imaging plates [32]. Furthermore, the polarization ...
X-ray astronomy detector
X-ray astronomy detectors are instruments that detect X-rays for use in the study of X-ray astronomy.X-ray astronomy is an observational branch of astronomy which deals with the study of X-ray emission from celestial objects. X-radiation is absorbed by the Earth's atmosphere, so instruments to detect X-rays must be taken to high altitude by balloons, sounding rockets, and satellites. X-ray astronomy is part of space science.X-ray astronomy detectors have been designed and configured primarily for energy and occasionally for wavelength detection using a variety of techniques usually limited to the technology of the time.