X-ray
Extended X ray emission in the IC 2497 Hanny's Voorwerp system: energy injection in the gas around a fading AGN
... The idea of a bubble inflated by an AGN undergoing a state change fits naturally into the general picture of unifying black hole (BH) accretion physics from X-ray binaries (XRB) to AGN. Rapid state ...
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X ray spectral constraints for z approximate to 2 massive galaxies: the identification of reflection dominated active galactic nuclei
... versus X-ray spectral slope (Γ is in the observed-frame ...and X-ray detected BzK galaxies (filled triangles; identi- fied here) are compared to well-studied local starbursts (open stars) and ...
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Searching for supergiant fast X ray transients with Swift
... the X-ray properties of the SFXTs since 2007, exploiting the unique observing capabilities of Swift (Gehrels et ...the X-ray Telescope (XRT, Burrows et ...hard X-ray transient ...
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SPECTRAL PROPERTIES OF X RAY BINARIES IN CENTAURUS A
... LMXBs) and we identify three transient black hole (BH) LMXB candidates coincident with the dust lane, which is the remnant of a small late-type galaxy. Our results also provide tentative support for the apparent “gap” in ...
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Globular Clusters and X Ray Point Sources in Centaurus A (NGC 5128)
... 3. X-RAY POINT SOURCES IN GLOBULAR CLUSTERS In the three decades since the breakthrough discovery of just one of its GCs by Graham & Phillips (1980) 415 GCs have been found in Cen A, through either ...
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Near Infrared Counterparts to Chandra X Ray Sources Toward the Galactic Center I Statistics and a Catalog of Candidates
... ≈210 X-ray sources that sat- isfy the hard and soft criteria, ...same X-ray flux restriction to our infrared/X-ray matches, we are left with only 61 and 93 hard and soft matches, ...
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WEAK HARD X RAY EMISSION FROM TWO BROAD ABSORPTION LINE QUASARS OBSERVED WITH NuSTAR: COMPTON THICK ABSORPTION OR INTRINSIC X RAY WEAKNESS?
... scattered X-ray spectra from a toroidal-shaped absorber/reprocessor in a physical and self-consistent way, and it was designed to model X-ray spectra in the Compton-thick ...high-energy ...
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Massive Stellar X ray Sources in the Galactic Center
... To determine the nature of these counterparts we obtained K -band spectra of 39 stars, of which 13 were discovered to have WR/O counterparts, in excellent agreement with our predicted success rate. This work brings the ...
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The Chandra COSMOS Legacy Survey: Source X Ray Spectral Properties
... The COSMOS fi eld has been observed with XMM-Newton to a fl ux limit of 7 × 10 −16 erg s −1 cm −2 in the 0.5 – 2 keV band ( Hasinger et al. 2007 ) . The point-source catalog development procedure is described in ...
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The Historical X ray Transient KY TrA in quiescence
... The distribution of black hole masses can only be determined from the study of X-ray binaries (e.g. Casares 2007) and it is in- tricately related to the population and evolution of massive stars, the ...
6
A transient sub eddington black hole x ray binary candidate in the dust lanes of centaurus a
... (NS) X-ray binary ...in X-ray flux makes it either the first confirmed transient non-ultraluminous X-ray black hole system in outburst to be subject to detailed spectral modeling ...
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WEAK HARD X RAY EMISSION FROM BROAD ABSORPTION LINE QUASARS: EVIDENCE FOR INTRINSIC X RAY WEAKNESS
... intrinsically X-ray weak by a factor of ≈ ...be X-ray weak (Wu et al. 2011), although the nature of their X-ray weakness (intrinsic X-ray weakness or absorption) is ...
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Long term x ray variability of typical active galactic nuclei in the distant universe
... long-term X-ray variability of typical distant AGNs, it will be dif fi cult to surpass greatly the present work for a considerable period of time; this is primarily due to the unmatched CDF-S exposure ...
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LOW X RAY LUMINOSITY GALAXY CLUSTERS: MAIN GOALS, SAMPLE SELECTION, PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS
... low X-ray luminosity ...low X-ray luminosity systems, where the high-quality images also allowed us to construct a morphological catalog to study galaxy morpholo- gies and scaling ...low ...
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Mid Infrared Properties and Color Selection for X Ray Detected Active Galactic Nuclei in the MUSYC Extended Chandra Deep Field South
... Mid-infrared diagnostic studies have found strong continuum emission originating in dust heated by the intense nuclear radia- tion field, an important indicator of AGN emission ( Laurent et al. 2000). Indeed, surveys ...
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THE NuSTAR EXTRAGALACTIC SURVEY: A FIRST SENSITIVE LOOK AT THE HIGH ENERGY COSMIC X RAY BACKGROUND POPULATION
... median X-ray luminosity of the NuSTAR sources over the Swift-BAT AGNs (see Section ...and X-ray luminosity for the Swift-BAT ...potential X-ray luminosity biases, is required to ...
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A new, faint population of X ray transients
... Chandra X-ray Center grant GO4-15130A (BL, WNB); NASA through Hubble Cycle 22 grant HST-GO-14043 (FEB) awarded by the Space Telescope Science Institute, which is operated by the Association of Universities ...
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Swift monitoring of NGC 5548: X ray reprocessing and short term UV/optical variability
... resultant X-ray count rate and hardness ratio (H = 2–10 keV; S = ...the X-ray and UVW2 flux light curves as noted previously between the X-ray and V bands by Uttley et ...
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The first pre supersoft X ray binary
... studies are known (Greiner 2000). This is due to a combination of the short duration of the SSS phase and because their very soft X-ray emission is easily absorbed by neutral hydrogen in the galactic plane. ...
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The Nustar Extragalactic Surveys: Overview and Catalog from the COSMOS Field
... emitted X-rays can be absorbed by high column densities of intervening ...hard X-ray satellites have performed population studies, such as those obtained using data from RXTE ( Sazonov & ...
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