XEUS: the physics of the hot evolving universe

Arnaud, M.; Barcons, X.; Barret, D.; Bautz, Marshall W.; Bellazzini, R.; Bleeker, J. A. M.; Böhringer, H.; Böller, Thomas; Brandt, W. N.; Cappi, M.; Carrera, Francisco J.; Comastri, A.; Costa, E.; Courvoisier, T. J. L.; Korte, P. de; Dwelly, T.; Fabian, A. C.; Flanagan, Kathryn A.; Gilli, R.; Griffiths, R. E.; Hasinger, G.; Kaastra, J. S.; Kahn, S. M.; Kelley, R. L.; Kunieda, H.; Makishima, Kazuo; Matt, Giorgio; Méndez, Mariano; Mitsuda, Kazuhisa; Nandra, K.; Ohashi, T.; Page, M. J.; Palumbo, G. G. C.; Pavlinsky, M.; Sciortino, S.; Smith, Alan; Strüder, L.; Takahashi, Tadayuki; Türler, M.; Turner, Martin; Ueda, Yoshihiro; Vignali, C.; Vink, Jacco; Warwick, R. S.; Watson, M. G.; Willingale, R.; Zhang, Shuang‐Nan

doi:10.1007/s10686-008-9104-y

Cited by 9 publications

(5 citation statements)

References 24 publications

(23 reference statements)

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“…To achieve longer focal lengths in the X-ray and gamma-ray regions of the electromagnetic spectrum, formation flying can be advantageous [19]. There have been numerous proposals for X-ray imaging missions, including XEUS (X-ray Evolving Universe Spectroscopy), Simbol-X, and FLIP-3 [16,20,21]. The XEUS was intended to place dual spacecraft in an L2 orbit, but it was absorbed into the Constellation-X project and transformed into a monolithic mission.…”

Section: Long-baseline Telescopementioning

confidence: 99%

“…The formation will be located at L2 and will have 1-10 days to observe the celestial target. Fresnel and MAXIM were created as extreme versions of MASSIM, with the goal of achieving microarcsecond angular resolution [15,[19][20][21][22][23][24]. With a 5-10 m-diameter lens and a focal length of 10 5 -10 6 km, gamma-ray detection will examine the event horizon surrounding supermassive black holes.…”

Section: Long-baseline Telescopementioning

confidence: 99%

See 1 more Smart Citation

Relative Orbit Control Algorithms and Scenarios for the Inertial Alignment Hold Demonstration Mission by CubeSat Formation Flying

Jeon,

Park,

Kim

2024

Aerospace

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CANYVAL-C is a formation-flying mission that demonstrates a coronagraph utilizing two CubeSats. The coronagraph is a space telescope that blocks sunlight to examine the overcast regions around the sun. It is composed of optical and occult segments. Two spacecraft were aligned with respect to an inertial system to configure a virtual telescope using inertial alignment hold technology. The relative orbit control scenario for this mission involves rendezvous, differential air drag control, and inertial alignment holding. Orbit control algorithms and simple strategies that can be automatically constructed onboard have also been developed. For each maneuver, the control performance under the errors from navigation, attitude determination and control, and propulsion systems were assessed via Monte Carlo simulation, taking into account the hardware specifications and operations. In addition to the algorithm and strategy of this mission, the relative orbit control scenario was evaluated for its practicability using Monte Carlo simulations. The feasibility of this mission is ensured by a statistical analysis of the prospect of its success during its operation.

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Section: Long-baseline Telescopementioning

confidence: 99%

Section: Long-baseline Telescopementioning

confidence: 99%

Relative Orbit Control Algorithms and Scenarios for the Inertial Alignment Hold Demonstration Mission by CubeSat Formation Flying

Jeon,

Park,

Kim

2024

Aerospace

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“…XEUS is an X-ray observatory concept (Arnaud et al, 2009) studied by ESA in the context of the Cosmic Vision 2015-2025. It was designed to investigate the hot (million degree) Universe, from hot baryonic matter in the intergalactic medium and the hot plasma in galaxy clusters to the immediate vicinities of black holes and of neutron stars where some of the most extreme conditions in the Universe are found.…”

Section: Long Telescopesmentioning

confidence: 99%

Science enabled by high precision inertial formation flying

Skinner

Dennis²,

Krizmanic

et al. 2013

IJSPACESE

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The capability of maintaining two satellites in precise relative position, stable in a celestial coordinate system, would enable major advances in a number of scientific disciplines and with a variety of types of instrumentation. The common requirement is for formation flying of two spacecraft with the direction of their vector separation in inertial coordinates precisely controlled and accurately determined as a function of time. We consider here the scientific goals that could be achieved with such technology and review some of the proposals that have been made for specific missions. Types of instrumentation that will benefit from the development of this type of formation flying include 1) imaging systems, in which an optical element on one spacecraft forms a distant image recorded by a detector array on the other spacecraft, including telescopes capable of very high angular resolution; 2) systems in which the front spacecraft of a pair carries an occulting disk, allowing very high dynamic range observations of the solar corona and exoplanets; 3) interferometers, another class of instrument that aims at very high angular resolution and which, though usually requiring more than two spacecraft, demands very much the same developments.Comment: To be published in "Int. J. Space Science and Engineering". This is a revised and expanded version of a paper presented at the "5th International Conference on Spacecraft Formation Flying Missions and Technologies(SFFMT)", Munich, May 201

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“…The presently planned International X-ray Observatory (IXO) arised from the merging of the former XEUS and Constellation-X missions. Because the details of the IXO mission have not been fixed yet, we used a preliminary response matrix of the former XEUS mission (Arnaud et al [2008]). We generated the data for a kyrline model with a rest energy of the line E = 6.4 keV and radial disc luminosity that follows a power law with the index q = 3.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

The comparison of the relativistic iron line models

Svoboda¹

2009

Proceedings of VII Microquasar Workshop: Microquasars and Beyond — PoS(MQW7)

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The analysis of the broad iron line profile in the X-ray spectra of active galactic nuclei and black hole X-ray binaries allows us to constrain the spin parameter of the black hole. We compare the constraints on the spin value for two X-ray sources, MCG-6-30-15 and GX 339-4, with a broad iron line using present relativistic line models in XSPEC -LAOR and KYRLINE. The LAOR model has the spin value set to the extremal value a = 0.9982, while the KYRLINE model enables direct fitting of the spin parameter. The spin value is constrained mainly by the lower boundary of the broad line, which depends on the inner boundary of the disk emission where the gravitational redshift is maximal. The position of the inner disk boundary is usually identified with the marginally stable orbit which is related to the spin value. In this way the LAOR model can be used to estimate the spin value. We investigate the consistency of the LAOR and KYRLINE models. We find that the LAOR model tends to overestimate the spin value. However, the discrepancies between results of both models are within the general uncertainties when applied on the current data.

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XEUS: the physics of the hot evolving universe

Cited by 9 publications

References 24 publications

Relative Orbit Control Algorithms and Scenarios for the Inertial Alignment Hold Demonstration Mission by CubeSat Formation Flying

Relative Orbit Control Algorithms and Scenarios for the Inertial Alignment Hold Demonstration Mission by CubeSat Formation Flying

Science enabled by high precision inertial formation flying

The comparison of the relativistic iron line models

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