McConnell XGPolarimetry SSE
... somewhat controversial, have helped to spawn a renewed interest in high-energy polarimetry. New observational techniques and dedicated instrumentation now being developed offer the first clear possibilities for definitive breakthroughs in the next ten years. In what follows, we outline some of the u ...
... somewhat controversial, have helped to spawn a renewed interest in high-energy polarimetry. New observational techniques and dedicated instrumentation now being developed offer the first clear possibilities for definitive breakthroughs in the next ten years. In what follows, we outline some of the u ...
Testing Models of Coronal Heating, X
... • Cranmer (2009) modeled equatorial zones of T Tauri stars as a collection of closed loops, energized by “footpoint shaking” (via blob-impact surface turbulence). ...
... • Cranmer (2009) modeled equatorial zones of T Tauri stars as a collection of closed loops, energized by “footpoint shaking” (via blob-impact surface turbulence). ...
Chandra News March 2005 Published by the Chandra X-ray Center (CXC)
... η Carinae is a nice example of progress made in the field of X-ray astronomy. The first claim of X-ray detection was in 1972. A weak source at the limit of detectability appeared in a scan of the Galactic plane with a rocket-borne detector. In 1979, the first Einstein observation of this region show ...
... η Carinae is a nice example of progress made in the field of X-ray astronomy. The first claim of X-ray detection was in 1972. A weak source at the limit of detectability appeared in a scan of the Galactic plane with a rocket-borne detector. In 1979, the first Einstein observation of this region show ...
Conceptual Design of the International Axion Observatory (IAXO)
... A third-generation experiment, the CERN Axion Solar Telescope (CAST), began data collection in 2003. The experiment uses a Large Hadron Collider (LHC) dipole prototype magnet with a magnetic field of up to 9 T over a length of 9.3 m [25]. Like Sumico, CAST is able to follow the Sun for several hours ...
... A third-generation experiment, the CERN Axion Solar Telescope (CAST), began data collection in 2003. The experiment uses a Large Hadron Collider (LHC) dipole prototype magnet with a magnetic field of up to 9 T over a length of 9.3 m [25]. Like Sumico, CAST is able to follow the Sun for several hours ...
The Stellar Population And Origin Of The Mysterious K.V. Getman
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
... The mysterious high galactic latitude cometary globule (CG) CG12 has been observed with the ACIS detector on board the Chandra X-ray Observatory. We detect 128 X-ray sources, of which a half are likely young stars formed within the globule's head. This new population of >=50 T-Tauri stars and one ne ...
Hunting for Orphaned Central Compact Objects among Radio Pulsars
... term timing revealed small period derivatives of Ṗ ≈ 10−17 (Halpern & Gotthelf 2010; Gotthelf et al. 2013a). Their spin parameters are plotted in the P -Ṗ diagram in Figure 1. These suggest spin-down luminosities of Ė ≡ 4π 2 I Ṗ /P 3 = 1031 –1032 erg s−1 , where I is the neutron star moment of i ...
... term timing revealed small period derivatives of Ṗ ≈ 10−17 (Halpern & Gotthelf 2010; Gotthelf et al. 2013a). Their spin parameters are plotted in the P -Ṗ diagram in Figure 1. These suggest spin-down luminosities of Ė ≡ 4π 2 I Ṗ /P 3 = 1031 –1032 erg s−1 , where I is the neutron star moment of i ...
IGR J18483-0311: a new intermediate supergiant fast X
... using the SofI instrument, as well as archival optical data from the USNO-A.2 catalogue, and mid-infrared (MIR) data from the GLIMPSE survey. They fitted it with a combination of two absorbed black bodies and showed that the best fit was consistent with the companion star being a heavily absorbed B ...
... using the SofI instrument, as well as archival optical data from the USNO-A.2 catalogue, and mid-infrared (MIR) data from the GLIMPSE survey. They fitted it with a combination of two absorbed black bodies and showed that the best fit was consistent with the companion star being a heavily absorbed B ...
on the mass of the black hole in gs
... We present J- and K9-band (1.95–2.35 mm) photometry of the quiescent X-ray nova GS 2000125, obtained in an attempt to constrain the mass of the compact object (MX ). Combined with the mass function of 4.97 MJ , the infrared light curves imply MX # 11 MJ (90% confidence level), regardless of the evol ...
... We present J- and K9-band (1.95–2.35 mm) photometry of the quiescent X-ray nova GS 2000125, obtained in an attempt to constrain the mass of the compact object (MX ). Combined with the mass function of 4.97 MJ , the infrared light curves imply MX # 11 MJ (90% confidence level), regardless of the evol ...
Jul y 9- 11,
... University of Washington We present results from a deep XMM-Newton survey of M33 consisting of 8 pointings extending beyond the D25 isophote sensitive to L(0.2-4.5 keV) ¡ 4 1034 erg/s. The large area coupled with the XMM soft response complement the deep Chandra Survey of M33. Cross-correlation of ...
... University of Washington We present results from a deep XMM-Newton survey of M33 consisting of 8 pointings extending beyond the D25 isophote sensitive to L(0.2-4.5 keV) ¡ 4 1034 erg/s. The large area coupled with the XMM soft response complement the deep Chandra Survey of M33. Cross-correlation of ...
"Characterization of 3D-integrated Active Pixel Sensor for X-ray Detection."
... A popular method to measure this crosstalk is pixel correlation analysis [9]–[11]. This involves a complex mathematical treatment and, importantly, assumes symmetrical crosstalk to the left and to the right. We found that the latter assumption is not valid in our sensor. X-ray detection is a direct ...
... A popular method to measure this crosstalk is pixel correlation analysis [9]–[11]. This involves a complex mathematical treatment and, importantly, assumes symmetrical crosstalk to the left and to the right. We found that the latter assumption is not valid in our sensor. X-ray detection is a direct ...
Associated Spectral and Temporal State Transition of the
... Galactic X-ray binaries harbouring stellar mass black holes can provide insight into their nature. The discovery of orbital modulations from the bright ULX M 82 X-1 (Kaaret et al. 2006; Kaaret & Feng 2007) and possibly from a ULX in IC 342 (Sugiho et al. 2001) implies that they too are binary system ...
... Galactic X-ray binaries harbouring stellar mass black holes can provide insight into their nature. The discovery of orbital modulations from the bright ULX M 82 X-1 (Kaaret et al. 2006; Kaaret & Feng 2007) and possibly from a ULX in IC 342 (Sugiho et al. 2001) implies that they too are binary system ...
X-ray and Gamma-ray Studies of the Millisecond Pulsar and
... or pulsar wind nebula associated with the pulsar. We also report on a search for point source emission and γ -ray pulsations in Fermi Large Area Telescope data using a likelihood analysis and photon probability weighting. Although PSR J1723–2837 is consistent with being a γ -ray point source, due to ...
... or pulsar wind nebula associated with the pulsar. We also report on a search for point source emission and γ -ray pulsations in Fermi Large Area Telescope data using a likelihood analysis and photon probability weighting. Although PSR J1723–2837 is consistent with being a γ -ray point source, due to ...
Here you can get a Science reprint
... GRO J1655-40 was launched far from its birthplace by an energetic SN explosion (2) at a runaway speed (3) of 120 km s⫺1. But so far there has been no observational evidence for a black hole formed without an energetic SN explosion. Cygnus X-1 (4) is a well-studied Galactic black hole candidate. The ...
... GRO J1655-40 was launched far from its birthplace by an energetic SN explosion (2) at a runaway speed (3) of 120 km s⫺1. But so far there has been no observational evidence for a black hole formed without an energetic SN explosion. Cygnus X-1 (4) is a well-studied Galactic black hole candidate. The ...
ULX accretion states
... (Mechanical power in addition to the X-ray emission) Some super-Eddington BHs may be jet dominated but radiatively faint (S26 in NGC7793) Relative power in the jet and radiation during super-Edd accretion is a fundamental issue to understand quasar feedback ...
... (Mechanical power in addition to the X-ray emission) Some super-Eddington BHs may be jet dominated but radiatively faint (S26 in NGC7793) Relative power in the jet and radiation during super-Edd accretion is a fundamental issue to understand quasar feedback ...
Lecture 2. Isolated Neutron Stars – I.
... About ½ of massive stars Are members of close binary systems. Now we know many dozens of close binary systems with neutron stars. ...
... About ½ of massive stars Are members of close binary systems. Now we know many dozens of close binary systems with neutron stars. ...
Educator`s Guide - Ott Planetarium
... energy ultraviolet radiation. The atmosphere also blocks much of the infrared spectrum. That’s great for living things, but it also means there’s a lot to “see” beyond what our atmosphere allows. If we want to observe in these wavelengths, we need to position our instruments above the atmosphere. Th ...
... energy ultraviolet radiation. The atmosphere also blocks much of the infrared spectrum. That’s great for living things, but it also means there’s a lot to “see” beyond what our atmosphere allows. If we want to observe in these wavelengths, we need to position our instruments above the atmosphere. Th ...
Ch a n d
... A major test of whether we understand neutron star low mass X-ray binaries is whether we can explain the super-Eddington Z-track sources. We present a physical explanation of the sources based on assuming the extended nature of the accretion disk corona for which there is now considerable evidence. ...
... A major test of whether we understand neutron star low mass X-ray binaries is whether we can explain the super-Eddington Z-track sources. We present a physical explanation of the sources based on assuming the extended nature of the accretion disk corona for which there is now considerable evidence. ...
3011800000631
... We have evaluated all available data, from the earlier observations in the optical and near infrared bands, and from the recent Spitzer observations in the mid-IR with gas disk models (Ertan et al. 2006). We find that the combined data set can be fit by a conventional gaseous disk model with viscous ...
... We have evaluated all available data, from the earlier observations in the optical and near infrared bands, and from the recent Spitzer observations in the mid-IR with gas disk models (Ertan et al. 2006). We find that the combined data set can be fit by a conventional gaseous disk model with viscous ...
AMUSE-Virgo AGN Multi-wavelength Survey
... SMBHs replaced by `compact stellar nuclei’ moving down the mass function. ...
... SMBHs replaced by `compact stellar nuclei’ moving down the mass function. ...
Altair -- the ``hottest`` magnetically active star in X-rays
... (International Ultraviolet Explorer) and was identified as a chromospheric component (Ferrero et al. 1995). The analysis of HST/GHRS spectra including Si iii and N v showed the presence of a transition region (Simon & Landsman 1997); also supported by FUSE (Far Ultraviolet Spectroscopic Explorer) sp ...
... (International Ultraviolet Explorer) and was identified as a chromospheric component (Ferrero et al. 1995). The analysis of HST/GHRS spectra including Si iii and N v showed the presence of a transition region (Simon & Landsman 1997); also supported by FUSE (Far Ultraviolet Spectroscopic Explorer) sp ...
1 1.1. The Facility and Experimental Setup
... (HXDS) obtained a total of 5225 different run identifiers (runid’s), which include 293,144 individual pulse-height spectra and 1486 High Speed Imager (HSI) images. The HRMA-only tests will be described in some detail in this document. In Phase 2 of the XRCF test program, science instruments and thei ...
... (HXDS) obtained a total of 5225 different run identifiers (runid’s), which include 293,144 individual pulse-height spectra and 1486 High Speed Imager (HSI) images. The HRMA-only tests will be described in some detail in this document. In Phase 2 of the XRCF test program, science instruments and thei ...
1 Introduction Chapter
... (HXDS) obtained a total of 5225 different run identifiers (runid’s), which include 293,144 individual pulse-height spectra and 1486 High Speed Imager (HSI) images. The HRMA-only tests will be described in some detail in this document. In Phase 2 of the XRCF test program, science instruments and thei ...
... (HXDS) obtained a total of 5225 different run identifiers (runid’s), which include 293,144 individual pulse-height spectra and 1486 High Speed Imager (HSI) images. The HRMA-only tests will be described in some detail in this document. In Phase 2 of the XRCF test program, science instruments and thei ...
ppt - WISH
... 2. Galaxy evolution, cluster formation: effects of environment, large scale structure These scientific goals require: large samples and high redshift ...
... 2. Galaxy evolution, cluster formation: effects of environment, large scale structure These scientific goals require: large samples and high redshift ...
History of X-ray astronomy
The history of X-ray astronomy begins in the 1920s, with interest in short wave communications for the U.S. Navy. This was soon followed by extensive study of the earth's ionosphere. By 1927, interest in the detection of X-ray and ultraviolet (UV) radiation at high altitudes inspired researchers to launch Goddard's rockets into the upper atmosphere to support theoretical studies and data gathering. The first successful rocket flight equipped with instrumentation able to detect solar ultraviolet radiation occurred in 1946. X-ray solar studies began in 1949. By 1973 a solar instrument package orbited on Skylab providing significant solar data.In 1965 the Goddard Space Flight Center program in X-ray astronomy was initiated with a series of balloon-borne experiments. In the 1970s this was followed by high altitude sounding rocket experiments, and that was followed by orbiting (satellite) observatories.The first rocket flight to successfully detect a cosmic source of X-ray emission was launched in 1962 by a group at American Science and Engineering (AS&E).X-ray wavelengths reveal information about the bodies (sources) that emit them.