High-Energy Emission from the PSR B1259
... OSSE is the only CGRO instrument which detected a positive flux from the field surrounding PSR B1259-63 (Grove et al. 1995). The OSSE tungsten slat collimator defines the 3.8◦ × 11.4◦ field of view, which was chosen as a compromise allowing high sensitivity to both diffuse emission and point sources ...
... OSSE is the only CGRO instrument which detected a positive flux from the field surrounding PSR B1259-63 (Grove et al. 1995). The OSSE tungsten slat collimator defines the 3.8◦ × 11.4◦ field of view, which was chosen as a compromise allowing high sensitivity to both diffuse emission and point sources ...
Tech Note: Wide Field-of-View Curved Focal Plane Array
... ground-based, space surveillance system (Figure 1). The SST is a novel, three-mirror, Mersenne-Schmidt f/1 telescope design that retains its inherent field, or Petzval, curvature. This design choice produces a much larger FOV than the FOV of a conventional telescope while providing sufficient sensit ...
... ground-based, space surveillance system (Figure 1). The SST is a novel, three-mirror, Mersenne-Schmidt f/1 telescope design that retains its inherent field, or Petzval, curvature. This design choice produces a much larger FOV than the FOV of a conventional telescope while providing sufficient sensit ...
pdf
... A general, insightful, and useful introduction to X-ray imaging systems and zone plates is given by Spiller.6 The specific status of diffractive optics for X-rays is reviewed by Michette11 where the use of zone plates for microscopy is emphasized. He points out the use of a central stop and axial ap ...
... A general, insightful, and useful introduction to X-ray imaging systems and zone plates is given by Spiller.6 The specific status of diffractive optics for X-rays is reviewed by Michette11 where the use of zone plates for microscopy is emphasized. He points out the use of a central stop and axial ap ...
Shell supernova remnants as cosmic accelerators: I Stephen Reynolds, North Carolina State University
... Residence time: CR radioactive nuclei (e.g., 10Be) ⇒ ages ~ 20 Myr Galactic volume ~ 1067 cm3 ⇒ require ~ 1041 J/yr to replenish CR's. SN rate ~ 2/century (except where are their remnants??) ⇒ need ~ 10% of SN energy into cosmic rays (primarily ions). Electrons: ~ 2% of energy in ions (st ...
... Residence time: CR radioactive nuclei (e.g., 10Be) ⇒ ages ~ 20 Myr Galactic volume ~ 1067 cm3 ⇒ require ~ 1041 J/yr to replenish CR's. SN rate ~ 2/century (except where are their remnants??) ⇒ need ~ 10% of SN energy into cosmic rays (primarily ions). Electrons: ~ 2% of energy in ions (st ...
Obserwacje strumienia promieniowania rentgenowskiego
... The BESSY synchrotron input spectrum (red) with overplotted response of SphinX D2 detector (black). Nominal effective areas have been used. The agreement is better than 5% in the energy band where SphinX detectors are the most sensitive. ...
... The BESSY synchrotron input spectrum (red) with overplotted response of SphinX D2 detector (black). Nominal effective areas have been used. The agreement is better than 5% in the energy band where SphinX detectors are the most sensitive. ...
airborne survey instrument - Portable Spectrometer FTIR
... for optimal signal to noise. The rotary interferometer lends itself more to airborne applications where high speed and freezing of motion are required. Either design can be used in an imaging type spectrometer, but so far only the rotary type has been built for imaging. Both types typically have a 1 ...
... for optimal signal to noise. The rotary interferometer lends itself more to airborne applications where high speed and freezing of motion are required. Either design can be used in an imaging type spectrometer, but so far only the rotary type has been built for imaging. Both types typically have a 1 ...
L. Moustakas
... -Possible implications EROs' progenitors were already fully in place upon formation? Star formation rates must have been high and sustained earlier ...
... -Possible implications EROs' progenitors were already fully in place upon formation? Star formation rates must have been high and sustained earlier ...
Introduction to X-ray Absorption Spectroscopy, Extended X
... XAS is applicable to any element, in any valence or spin state, in samples in any physical state (solution, frozen solution, powder, single crystal, crystalline slurry, gas) Institute for Molecules and Materials Mini-school X-ray Absorption Spectroscopy, SyNeW Utrecht, June 2, 2015 ...
... XAS is applicable to any element, in any valence or spin state, in samples in any physical state (solution, frozen solution, powder, single crystal, crystalline slurry, gas) Institute for Molecules and Materials Mini-school X-ray Absorption Spectroscopy, SyNeW Utrecht, June 2, 2015 ...
Signals from the Beginnings of the World - Max-Planck
... 200 degrees so as not to generate additional background radiation. Finally, exposures in the near infrared must typically be as short as only about 10 seconds – otherwise the detector will be dazzled by the bright, ever-present celestial background. In order to record sources that are fainter than t ...
... 200 degrees so as not to generate additional background radiation. Finally, exposures in the near infrared must typically be as short as only about 10 seconds – otherwise the detector will be dazzled by the bright, ever-present celestial background. In order to record sources that are fainter than t ...
Flares and the chromosphere Hugh S. Hudson and Lyndsay Fletcher
... The observations indicate that coronal energy dissipates in the chromosphere, and the hard X-ray signature directly implicates weakly relativistic electrons. Thus the magnetic restructuring, and the energy transport it implies, must somehow result in the acceleration of electrons to non-thermal ener ...
... The observations indicate that coronal energy dissipates in the chromosphere, and the hard X-ray signature directly implicates weakly relativistic electrons. Thus the magnetic restructuring, and the energy transport it implies, must somehow result in the acceleration of electrons to non-thermal ener ...
Electron/proton separation and analysis techniques used in the AMS
... (ISS) in May 2011, where it is collecting cosmic rays up to TeV energies. The search for Dark Matter indirect signatures in the rare components of the cosmic ray fluxes is among the main objectives of the experiment. AMS-02 is providing cosmic electrons and positrons data with an unprecedented preci ...
... (ISS) in May 2011, where it is collecting cosmic rays up to TeV energies. The search for Dark Matter indirect signatures in the rare components of the cosmic ray fluxes is among the main objectives of the experiment. AMS-02 is providing cosmic electrons and positrons data with an unprecedented preci ...
PH507lecnote07_mcp5
... unchanged, alternately stretching and shrinking distances on an infinitesimal scale. Their strength decreases as a function of distance from their source. The study of gravitational waves could yield an incredible amount of information about the universe and lead to many practical applications. For ...
... unchanged, alternately stretching and shrinking distances on an infinitesimal scale. Their strength decreases as a function of distance from their source. The study of gravitational waves could yield an incredible amount of information about the universe and lead to many practical applications. For ...
Notes - Michigan State University
... 1957 Cook, Fowler, Lauritsen and Lauritsen at Kellogg Radiation Laboratory at Caltech discovered a state with the correct properties (at 7.654 MeV) Experimental Nuclear Astrophysics was born ...
... 1957 Cook, Fowler, Lauritsen and Lauritsen at Kellogg Radiation Laboratory at Caltech discovered a state with the correct properties (at 7.654 MeV) Experimental Nuclear Astrophysics was born ...
ppt - Fusion Technology Institute
... interplanetary missions due to the very high specific power (thrust power/ propulsion system mass) and specific impulse (average exhaust velocity normalized by ...
... interplanetary missions due to the very high specific power (thrust power/ propulsion system mass) and specific impulse (average exhaust velocity normalized by ...
Короткий гамма-всплеск GRB 130603: открытие килоновой
... mysteries of astrophysics today. While a favoured model for their origin is the merger of two compact objects (e.g., neutron stars) this lacks a smoking gun signature to date. However, these mergers are expected to create radioactive species, including heavy r-process elements, which should result i ...
... mysteries of astrophysics today. While a favoured model for their origin is the merger of two compact objects (e.g., neutron stars) this lacks a smoking gun signature to date. However, these mergers are expected to create radioactive species, including heavy r-process elements, which should result i ...
Non-variable cosmologically distant gamma
... 10−7 G (so that the initial directions of electrons are not dramatically changed), the resulting gamma-ray synchrotron sources can be quite compact with an angular size as small as 0.1◦ . For cosmologically distant sources embedded in denser (nph ∝ (1 + z)3 ) and more energetic (T ∝ 1 + z) CMBR, pro ...
... 10−7 G (so that the initial directions of electrons are not dramatically changed), the resulting gamma-ray synchrotron sources can be quite compact with an angular size as small as 0.1◦ . For cosmologically distant sources embedded in denser (nph ∝ (1 + z)3 ) and more energetic (T ∝ 1 + z) CMBR, pro ...
Slide 1
... • Refracting telescopes make images with a lens • Reflecting telescopes with a mirror • Modern research telescopes are all reflectors • CCDs are used for data collection ...
... • Refracting telescopes make images with a lens • Reflecting telescopes with a mirror • Modern research telescopes are all reflectors • CCDs are used for data collection ...
Searches for Cosmic-Ray Electron Anisotropies with the Fermi
... We search for anisotropies with no a priori assumptions on the energy, direction, and angular size of the anisotropy. − Analyzed multiple subsets of the data: E>60GeV, E>120GeV, E>240GeV, E>480GeV. − Started with an all-sky search but also evaluated the sky towards candidate sources (different trial ...
... We search for anisotropies with no a priori assumptions on the energy, direction, and angular size of the anisotropy. − Analyzed multiple subsets of the data: E>60GeV, E>120GeV, E>240GeV, E>480GeV. − Started with an all-sky search but also evaluated the sky towards candidate sources (different trial ...
ASTRONOMY 301 PROBLEM SET NUMBER 3 DUE IN CLASS
... problem and any formulae you used and algebraic manipulation that you did. You are encouraged to work together to figure out the method of solution, but you must write out the solutions independently in your own words. Do all five problems; each problem counts 1 point. Turn in your answers in class ...
... problem and any formulae you used and algebraic manipulation that you did. You are encouraged to work together to figure out the method of solution, but you must write out the solutions independently in your own words. Do all five problems; each problem counts 1 point. Turn in your answers in class ...
IMAP (Interstellar MApping Probe)
... times the sensitive area of COMPTEL, the most sensitive such detector to have flown. The imaging property would greatly reduce the local neutron background effects. For γ rays >10 MeV, we require an effective area of order 50 cm2 and 20% energy resolution. To measure γ-rays from 0.2 to 10 MeV one or ...
... times the sensitive area of COMPTEL, the most sensitive such detector to have flown. The imaging property would greatly reduce the local neutron background effects. For γ rays >10 MeV, we require an effective area of order 50 cm2 and 20% energy resolution. To measure γ-rays from 0.2 to 10 MeV one or ...
V. Sahakian
... The six sources from these eights there are counterparts at other wavelengths. However, for the two sources, HESS J1813-178 and HESS J1614-518, no counterparts have been found at other wavelengths. HESS J1813-178 resembles the unidentified TeV source discovered by HEGRA, TeV J2032+4130, and the firs ...
... The six sources from these eights there are counterparts at other wavelengths. However, for the two sources, HESS J1813-178 and HESS J1614-518, no counterparts have been found at other wavelengths. HESS J1813-178 resembles the unidentified TeV source discovered by HEGRA, TeV J2032+4130, and the firs ...
ICHEP_glin
... (c) Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 106, Taiwan. ...
... (c) Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 106, Taiwan. ...
Light and Telescopes - Otterbein University
... correct optics during light gathering: adaptive and active optics • Interferometry • Radio astronomy ...
... correct optics during light gathering: adaptive and active optics • Interferometry • Radio astronomy ...
Mauna Kea Site Monitoring Working Group 1998 Activities
... field instruments are examples of nextgeneration ground-based facilities that will revolutionize our understanding of the universe The years ahead in astronomy will include explorations of very large and very small structures In either case, large scale, high performance, affordable optical and in ...
... field instruments are examples of nextgeneration ground-based facilities that will revolutionize our understanding of the universe The years ahead in astronomy will include explorations of very large and very small structures In either case, large scale, high performance, affordable optical and in ...
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.