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A New Cluster of Galaxies towards the Galactic Bulge, Suzaku J1759-3450
High Energy Astrophysical Phenomena · Submitted 6 Jun 2013
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim In terms of the spatial extent, the X-ray spectrum, and the bolometric luminosity of the X-ray emitting gas, we concluded that Suzaku J1759-3450 is a new cluster of galaxies.
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The abstract, sentence by sentence
We observed an extended X-ray source designated as Suzaku J1759-3450 with the Suzaku and Chandra observations towards 1RXS J175911.0-344921, which is an unidentified X-ray source listed in the ROSAT Bright Source Catalogue. A conspicuous emission line at 6 keV was also found in the Suzaku J1759-3450 spectrum. Assuming the emission line to be K emission from He-like Fe ions, we inferred Suzaku J1759-3450 to be an extragalactic object located at z = 0.13. The radial profile of the surface brightness in the 0.5-10 keV band was explained well with an isothermal beta-model of r_c = 1.61' and beta = 0.78. The X-ray spectrum was well reproduced by an optically-thin thermal plasma with the electron temperature of kT_e = 5.3 keV attenuated by the photoelectric absorption of N_H = 2.3 x 10^21 cm^-2. The bolometric X-ray luminosity of L_X (r < r_500) = 4.3 x 10^44 erg s^-1 is consistent with that expected from the L_X-T relation of clusters of galaxies. In terms of the spatial extent, the X-ray spectrum, and the bolometric luminosity of the X-ray emitting gas, we concluded that Suzaku J1759-3450 is a new cluster of galaxies.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We observed an extended X-ray source designated as Suzaku J1759-3450 with the Suzaku and Chandra observations towards 1RXS J175911.0-344921, which is an unidentified X-ray source listed in the ROSAT Bright Source Catalogue. | contribution 0.67 | 0.93 | 0.03 | asserted 1.00 |
| s1 | A conspicuous emission line at 6 keV was also found in the Suzaku J1759-3450 spectrum. | result 1.00 | 0.92 | 0.02 | asserted 1.00 |
| s2 | Assuming the emission line to be K emission from He-like Fe ions, we inferred Suzaku J1759-3450 to be an extragalactic object located at z = 0.13. | interpretation 0.85 | 0.93 | 0.07 | asserted 0.56 |
| s3 | The radial profile of the surface brightness in the 0.5-10 keV band was explained well with an isothermal beta-model of r_c = 1.61' and beta = 0.78. | result 0.95 | 0.91 | 0.03 | asserted 0.98 |
| s4 | The X-ray spectrum was well reproduced by an optically-thin thermal plasma with the electron temperature of kT_e = 5.3 keV attenuated by the photoelectric absorption of N_H = 2.3 x 10^21 cm^-2. | result 1.00 | 0.92 | 0.03 | asserted 1.00 |
| s5 | The bolometric X-ray luminosity of L_X (r < r_500) = 4.3 x 10^44 erg s^-1 is consistent with that expected from the L_X-T relation of clusters of galaxies. | result 0.84 | 0.86 | 0.06 | hedged possibility 0.95 |
| s6 | In terms of the spatial extent, the X-ray spectrum, and the bolometric luminosity of the X-ray emitting gas, we concluded that Suzaku J1759-3450 is a new cluster of galaxies. | interpretation 0.67 | 0.91 | 0.97 | asserted 1.00 |
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Original abstract
We observed an extended X-ray source designated as Suzaku J1759-3450 with the Suzaku and Chandra observations towards 1RXS J175911.0-344921, which is an unidentified X-ray source listed in the ROSAT Bright Source Catalogue. A conspicuous emission line at 6 keV was also found in the Suzaku J1759-3450 spectrum. Assuming the emission line to be K emission from He-like Fe ions, we inferred Suzaku J1759-3450 to be an extragalactic object located at z = 0.13. The radial profile of the surface brightness in the 0.5-10 keV band was explained well with an isothermal beta-model of r_c = 1.61' and beta = 0.78. The X-ray spectrum was well reproduced by an optically-thin thermal plasma with the electron temperature of kT_e = 5.3 keV attenuated by the photoelectric absorption of N_H = 2.3 x 10^21 cm^-2. The bolometric X-ray luminosity of L_X (r < r_500) = 4.3 x 10^44 erg s^-1 is consistent with that expected from the L_X-T relation of clusters of galaxies. In terms of the spatial extent, the X-ray spectrum, and the bolometric luminosity of the X-ray emitting gas, we concluded that Suzaku J1759-3450 is a new cluster of galaxies.
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