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Results 1 - 10
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281
X-ray Nova XTE J1550-564: RXTE Spectral Observations
, 1999
"... Excellent coverage of the 1998 outburst of the X-ray Nova XTE J1550–564 was provided by the Rossi X-ray Timing Explorer. XTE J1550–564 exhibited an intense (6.8 Crab) flare on 1998 September 19 (UT), making it the brightest new X-ray source observed with RXTE. We present a spectral analysis utilizin ..."
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utilizing 60 Proportional Counter Array spectra from 2.5–20 keV spanning 71 days, and a nearly continuous All Sky Monitor light curve. The spectra were fit to a model including multicolor blackbody disk and power-law components. XTE J1550–564 is observed in the very high, high/soft, and intermediate
RXTE Spectral Observations of the 1996–97 Outburst of the Microquasar GRO J1655–40
, 1999
"... Excellent coverage of the entire 16-month 1996–97 outburst cycle of GRO J1655–40 was provided by the Rossi X-ray Timing Explorer. We present a full spectral analysis of these data, which includes 52 Proportional Counter Array spectra from 2.5–20 keV and High Energy X-ray Timing Experiment spectra ab ..."
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above 20 keV. We also include a nearly continuous All-Sky Monitor light curve with several intensity measurements per day. The data are interpreted in the context of the multicolor blackbody disk/power-law model. The source exhibits two principal outburst states which we associate with the very high
Multicoloring Unit Disk Graphs on Triangular Lattice Points
- PROCEEDINGS OF THE SIXTEENTH ACM-SIAM SYMPOSIUM ON DISCRETE ALGORITHMS
, 2004
"... Given a pair of non-negative integers m and n, P (m, n) denotes a subset of 2-dimensional triangular lattice points defined by P (m, n) ... ..."
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Cited by 3 (1 self)
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Given a pair of non-negative integers m and n, P (m, n) denotes a subset of 2-dimensional triangular lattice points defined by P (m, n) ...
Multicoloring Unit Disk Graphs on Triangular Lattice Points
"... Given a pair of non-negative integers m and n, P (m, n) denotes the subset of 2-dimensional integer triangular ..."
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Given a pair of non-negative integers m and n, P (m, n) denotes the subset of 2-dimensional integer triangular
Research in Astronomy and Astrophysics XMM-Newton observations of H2O maser galaxy NGC 7479 ∗
, 2009
"... Abstract The XMM-Newton observations of H2O megamaser galaxy NGC 7479 are presented. Its smoothed X-ray image clearly shows spiral morphology, which matches well with its optical asymmetric spiral structure. One prominent source can be found at the tip of its northern spiral arm, which is much brigh ..."
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law, thermal bremsstrahlung, multicolor blackbody disk plus another blackbody or power law. Further observations (e.g., the tremendous improvement in the spatial resolution of the Chandra X-ray observations) and studies are desirable for probing the nature of this prominent source. In addition, we
Complete RXTE Spectral Observations of the Black Hole X-ray Nova XTE J1550–564
, 2000
"... We report on the X-ray spectral behavior of XTE J1550–564 during its 1998-99 outburst. XTE J1550–564 is an exceptionally bright X-ray nova and is also the third Galactic black hole candidate known to exhibit quasiperiodic X-ray oscillations above 50 Hz. Our study is based on 209 pointed observations ..."
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observations using the PCA and HEXTE instruments onboard the Rossi X-ray Timing Explorer spanning 250 days and covering the entire double-peaked eruption that occurred from 1998 September until 1999 May. The spectra are fit to a model including multicolor blackbody disk and power-law components. The spectra
unknown title
, 2000
"... We report on the X-ray spectral behavior of XTE J1550[564 during its 1998È1999 outburst. XTE J1550[564 is an exceptionally bright X-ray nova and is also the third Galactic black hole candi-date known to exhibit quasi-periodic X-ray oscillations above 50 Hz. Our study is based on 209 pointed observat ..."
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observations using the PCA and HEXTE instruments on board the Rossi X-Ray T iming Explorer (RXT E) spanning 250 days and covering the entire double-peaked eruption that occurred from 1998 September until 1999 May. The spectra are Ðtted to a model including multicolor blackbody disk and power-law components
Two X-ray Sources in 30 Doradus: Wolf-Rayet + Black Hole Binaries?
, 1995
"... I report the detection of two X-ray sources of luminosities ∼ 10 36 ergs s −1 in the central region of 30 Doradus. These two sources appear point-like in images taken with the ROSAT HRI. One of the sources is most likely associated with a close spectroscopic binary R140a2 (WN6) with an orbital perio ..."
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similar nature. Available X-ray spectral data support this Wolf-Rayet + black-hole binary explanation of the two sources. I have used a ROSAT PSPC observation to show that the sources have ultrasoft spectra with possible intrinsic absorption. Modeled with multicolor blackbody disks, the spectra provide
DISCOVERY OF A RELATION BETWEEN THE HEIGHT OF THE RADIATIVELY-SUPPORTED DISK AND THE BLACKBODY LUMINOSITY OF LMXB
, 1999
"... We present results of a survey of the spectra of the Atoll and Z-track classes of Low Mass X-ray Binaries based on ASCA data. It is shown that all sources in the survey are well-fitted by the same two-component emission model that we have previously shown is able to describe both the non-dip and dip ..."
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-dip and dip spectra of the dipping class of LMXB. This model consists of point-like blackbody emission which we have associated with the neutron star plus extended Comptonized emission probably from the accretion disk corona. In all sources studied, a blackbody component is required. We demonstrate
A ionized reflecting skin above the accretion disk of GX 349+2
, 906
"... Context. The broad emission features in the Fe-Kα region of X-ray binary spectra represent an invaluable probe to constrain the geometry and the physics of these systems. Several Low Mass X-ray binary systems (LMXBs) containing a neutron star (NS) show broad emission features between 6 and 7 keV and ..."
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effective area and good spectral resolution between 6 and 7 keV, a detailed spectroscopic study of the Fe-Kα region. Methods. We study the XMM data in the 0.7-10 keV energy band. The continuum emission is modelled by a blackbody component plus a multicolored disk blackbody. A very intense emission line at 1
Results 1 - 10
of
281
