A5060207215- Advanced X-ray Imaging Techniques
- Astrophysical Phenomena and Observations
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Adaptive optics and wavefront sensing
- Advanced Surface Polishing Techniques
- High-pressure geophysics and materials
- Gamma-ray bursts and supernovae
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Stellar, planetary, and galactic studies
- Dark Matter and Cosmic Phenomena
- Metal and Thin Film Mechanics
- Diamond and Carbon-based Materials Research
- Astrophysics and Cosmic Phenomena
- Calibration and Measurement Techniques
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Thin-Film Transistor Technologies
- Surface Roughness and Optical Measurements
- Advanced X-ray and CT Imaging
- Silicon and Solar Cell Technologies
- Advanced Semiconductor Detectors and Materials
- 3D IC and TSV technologies
Technical University of Denmark
2014-2024
DTU Space
2015-2024
DXC Technology (Denmark)
2023
European Space Research and Technology Centre
2020-2023
Brera Astronomical Observatory
2022-2023
Micronit Microfluidics (Netherlands)
2023
SRON Netherlands Institute for Space Research
2023
Teledyne e2v (United Kingdom)
2022
Cosine (Netherlands)
2018-2019
University of Copenhagen
2008-2011
The search for diffuse non-thermal inverse Compton (IC) emission from galaxy clusters at hard X-ray energies has been undertaken with many instruments, most detections being either of low significance or controversial. Background and contamination uncertainties present in the data non-focusing observatories result lower sensitivity to IC a greater chance false detection. We 266ks NuSTAR observations Bullet cluster, detected 3-30 keV. NuSTAR's unprecedented focusing capability largely...
A bstract This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in Sun, with unprecedented sensitivity. BabyIAXO conceived test all subsystems (magnet, optics detectors) relevant scale final system thus serve as prototype IAXO, but same time fully-fledged physics reach itself, potential discovery....
GRB 060505 was the first well-observed nearby possible long-duration gamma-ray burst (GRB) that had no associated supernova. Here we present spatially resolved spectra of host galaxy 060505, an Sbc spiral, at redshift z = 0.0889. The occurred inside a star-forming region in northern spiral arm 6.5 kpc from center. From position emission lines, determine maximum rotational velocity for v ∼ 212 km s−1, corresponding to mass 1.14 × 1011 M☉ within 11 By fitting single-age spectral synthesis...
The High-Energy X-ray Probe (HEX-P) is a probe-class next-generation high-energy mission concept that will vastly extend the reach of broadband observations. Studying 2-200 keV energy range, HEXP has 40 times sensitivity any previous in 10-80 band, and be first focusing instrument 80-200 band. A successor to Nuclear Spectroscopic Telescope Array (NuSTAR), NASA Small Explorer launched 2012, HEX-P addresses key science objectives, serve as an important complement ESA's L-class Athena mission....
Q0151+048 is a physical QSO pair at z ~ 1.929 with separation of 3.3 arcsec on the sky. In spectrum Q0151+048A (qA), DLA observed higher redshift. We have previously detected host galaxies both QSOs, as well Lya blob. performed low-resolution spectroscopy slit aligned extended emission. also system using medium-resolution VLT/X-shooter spectrograph and two QSOs. measure systemic redshifts zem(A)=1.92924{\pm}0.00036 zem(B)=1.92863{\pm}0.00042 from H{\beta} H{\alpha} emission lines,...
The Beam Expander Testing X-ray facility (BEaTriX) is a unique apparatus now operated at the Istituto Nazionale di Astrofisica (INAF), Osservatorio Astronomico Brera (OAB), in Merate, Italy. It has been specifically designed to measure point spread function (PSF) and effective area (EA) of mirror modules (MMs) Advanced Telescope for High-ENergy Astrophysics (ATHENA), based on silicon pore optics (SPO) technology, verification before integration into assembly. To this end, BEaTriX generates...
There is a long-standing discrepancy between galaxy cluster masses determined from X-ray and gravitational lensing observations of which Abell 1689 well studied example. In this work, we take advantage 180 ks Chandra new weak study based on Hubble Space Telescope mosaic covering the central 1.8 Mpc × 1.4 to eliminate mass discrepancy. contrast earlier analyses where very circular surface brightness has been inferred as being spherically symmetric in hydrostatic equilibrium, hardness ratio...
Context. The shapes and spin states of asteroids observed with photometric techniques can be reconstructed using the lightcurve inversion method. resultant models then confirmed or exploited further by other techniques, such as adaptive optics, radar, thermal infrared, stellar occultations, space probe imaging.
The science requirements for the Athena X-ray mirror are to provide a collecting area of 2 m<sup>2</sup> at 1 keV, an angular resolution ~5 arc seconds half energy eidth (HEW) and field view diameter 40-50 minutes. This combination over wide possible because unique features Silicon pore optics (SPO) technology used. Here we describe optimization modifications SPO required achieve specification demonstrate how optical design system impacts on scientific performance Athena.
We report the latest results on coating design optimisation and optics performance for present Ir/B<sub>4</sub>C baseline alternative designs materials, including bilayers linear graded multilayers. make use of X-ray reflectometry (XRR) to test both robustness.
We present the expected coating performance based on design and simulations, tested evaluated by means of X-ray reflectometry short long term stability several materials considered as options for mirrors ATHENA mission. As part this study we also report compatibility reflecting coatings to industrial processes involved in assembly mirror modules using Silicon Pore Optics technology.
Athena, the largest space-based x-ray telescope to be flown by European Space Agency, uses a revolutionary new modular technology assemble its 2.6 m diameter lens. The lens will consist of several hundreds smaller lenslets, called mirror modules, which each about 70 pairs. Those modules are arranged in circles large optics structure and focus photons with an energy 0.5 10 keV at distance 12 onto detectors Athena. point-spread function (PSF) optic shall achieve half-energy width (HEW) 5" 1...
Silicon Pore Optics (SPO), developed at cosine with the European Space Agency (ESA) and several academic industrial partners, provides lightweight, yet stiff, high-resolution x-ray optics. This technology enables ATHENA to reach an unprecedentedly large effective area in 0.2 - 12 keV band angular resolution better than 5''. After developing for 50 m 20 focal length, this year has witnessed first length mirror modules being produced. The development is also gaining momentum three different...
The work on the definition and technological preparation of ATHENA (Advanced Telescope for High ENergy Astrophysics) mission continues to progress. In parallel study accommodation telescope, many aspects X-ray optics are being evolved further. technology chosen is Silicon Pore Optics (SPO), which hinges spin-in from semiconductor industry, uses a modular approach produce large effective area lightweight telescope with good angular resolution. Both system studies developments guided by ESA...
Silicon Pore Optics (SPO) has been established as a new type of x-ray optics that enables future observatories such Athena. SPO is being developed at cosine with the European Space Agency (ESA) and academic industrial partners. The modules are lightweight, yet stiff, high-resolution optics, shall allow missions to reach an unprecedentedly large effective area several square meters, operating in 0.2 - 12 keV band angular resolution better than 5 arc seconds. In this paper we going discuss...
The re-formulation phase of the next generation x-ray observatory ATHENA (Advanced Telescope for High ENergy Astrophysics) – now NewATHENA - is being utilized further improvements optics technology. Silicon Pore Optics (SPO) remains technology choice, since it uniquely combines a low mass, large effective area, and good angular resolution, addressing challenge X-ray optics. performance preparation cost-effective implementation flight evolved in joint effort by industry, research institutions...
The ATHENA mission concept, now called ATHENA+, continues to be refined address important questions in modern astrophysics. Previous studies have established that the requirement for effective area can achieved using a combination of bi-layer coatings and/or simple graded multilayers. We find further coating developments improve on baseline specifications and present here preliminary results optimization design based new ATHENA+ mission. performances several material combinations are...
As part of the ongoing effort to optimize throughput Athena optics we have produced mirrors with a state-of-the-art cleaning process.We report on studies related importance photolithographic process.Pre-coating characterization has shown and still shows photoresist remnants SiO 2rib bonding zones, which influences quality metallic coating ultimately mirror performance.The size is order 10 nm about half thickness final coating.An improved process been developed including O 2 plasma in remove...
We present several concept designs of hard X-ray/soft λ-ray focusing telescopes for future astrophysics missions. The are based on depth graded multilayer coatings. These have been successfully employed the NuSTAR mission energies up to 80 keV. Recent advances in demonstrating theoretical reflectivities candidate material combinations 400 keV including effects incoherent scatter has given an experimental base extending this type soft range. At same time, calibration in-flight performance a...
ATHENA (Advanced Telescope for High ENergy Astrophysics) is being studied by the European Space Agency (ESA) as second large science mission, with a launch slot in 2028. System studies and technology preparation activities are on-going. The optics of telescope based on modular Silicon Pore Optics (SPO), novel X-ray significantly benefiting from spin-in semiconductor industry. Several development implemented ESA collaboration industry institutions. related programmatic background, approach...
We present the results of a 55ks NuSTAR observation core Coma Cluster. The global spectrum can be explained by thermal gas emission, with conservative 90% upper limit to non-thermal inverse Compton (IC) emission $5.1 \times 10^{-12}$ erg cm$^{-2}$ s$^{-1}$ in 12 arcmin $\times$ field view . brightness component this central region does not allow more stringent limits on IC when compared non-imaging instruments much larger fields where claims detections have been made. Future mosaic...
Athena is the European Space Agency's next flagship telescope, scheduled for launch in 2030s.Its 2.5 m diameter mirror will be segmented and comprise more than 600 individual Silicon Pore Optics (SPO) modules.Arranged concentric annuli following a Wolter-Schwartzschild design, modules are made of several tens grazing incidence primary-secondary pairs, each silicon, coated to increase effective area system, shaped bring incoming photons common focus 12 away.The mission aims deliver...
We present description and results of the test campaign performed on Silicon Pore Optics (SPO) samples to be used ATHENA mission. perform a pre-coating characterization substrates using Atomic Force Microscopy (AFM), X-ray Re ectometry (XRR) scatter measurements. tests at DTU Space correlation between measured roughness are reported. For coating development, layer Cr was applied underneath Ir/B4C bi-layer with goal reducing stress, use N2 during process tested in order reduce surface...
The optimization of coating design for the ATHENA mission si described and possibility increasing telescope effective area in range between 0.1 10 keV is investigated. An independent computation on-axis based on mirror performed order to review current baseline. performance several material combinations, considering a simple bi-layer, multilayer linear graded coatings are tested simulation both optimized baseline including on- off-axis curves presented. We find that use multilayers can...