Abstracts

Rene Hudec: AXRO Welcome and Historical Background

AXRO Welcome and Historical Background will be given.

John Nousek: Speeding up Swift

NASA\'s Neil Gehrels Swift Observatory has functioned for a decade and a half as the world\'s premier observatory for rapid time-domain astrophysics. The pace of extraordinary speed of discovery through programs such as the LIGO gravitational wave, IceCube neutrino sources and the LSST transient discovery program demands that Swift becomes even faster, and able to handle multiple simultaneous Target of Opportunity requests. I will outline our plans for new software development and operational management that both shorten Swift\'s response times, more...

Gabriel Torok: On mass of active galactic nucleus XMMUJ134736.6+173403

A recent study of the X-ray source XMMUJ134736.6+173403 has revealed a strong quasi-periodic modulation of the X-ray flux. The observation of two quasiperiodic oscillations (QPOs) that occur on a daily timescale and exhibit a 3:1 frequency ratio strongly supports the evidence of an active galactic nucleus black hole (AGN BH) presence. Assuming orbital origin of QPOs we calculate the upper and lower limit on AGN BH mass M arriving at M~10^7-10^9Msun. Comparing that to mass estimates of other sources, more...

Tanmoy Chattopadhyay: Characterization of an X-ray Lobster Optic with a Hybrid CMOS detector

X-ray lobster optics provide a unique way to focus X-rays onto a small focal plane imager with wide field of view imaging. With angular resolution of a few arcminutes, such an instrument can be used to study GRB afterglows, transients, and the variability and spectroscopic characteristics of myriad other astrophysical objects. At Penn State University, we are characterizing a lobster optic with an H1RG X-Ray hybrid CMOS detector (100 μm thick Silicon with 18 μm pixel size). The light-weight compact more...

Vojtech Simon: Long-term activity of binary X-ray sources in various energy bands

Monitors of X-ray emission are important instruments for observing the activity of X-ray sources on the long timescales (e.g., years). Simultaneous monitoring of the same object with several monitors (e.g., with ISS/MAXI and Swift/BAT) and smoothing of the data by the one-day means enables us to investigate the activity in various energy bands (even spanning over several tens of kiloelectronvolts). It also enables to determine the hardness ratio of X-ray emission. This approach is useful also for the future satellites. more...

Maria D. Caballero-Garcia: Results from the use of the X-ray reverberation model KYNREFREV: exploring new coronal geometries

X-ray reverberation in Active Galactic Nuclei, believed to be the result of the reprocessing of corona photons by the underlying accretion disc, has allowed us to probe the properties of the inner-most regions of the accretion flow and the central black hole. Our current model (KYNREFREV) computes the time-dependent reflection spectra of the disc as a response to a flash of primary power-law radiation from a point source corona located on the axis of the black hole accretion disc (lamp-post more...

Rene Hudec: ESA SMILE and Czech participation

The Solar wind Magnetosphere Ionosphere Link Explorer, or SMILE, is a joint mission between the European Space Agency (ESA) and the Chinese Academy of Sciences (CAS). SMILE aims to build a more complete understanding of the Sun-Earth connection by measuring the solar wind and its dynamic interaction with the magnetosphere. The scientific payload includes the soft X-ray telescope SXI based on Lobster Eye optis for providing X ray images of X ray emitting regios in Earths magnetospehere. The Czech participation more...

Vladimír Dániel: REX LE X-ray Telescope experiment overview

The presentation will summarize the Rocket EXperiment (REX) LE X-ray Telescope payload results. The experiment was performed by the PennState University with X-ray spectroscope on board a Water Recovery X-Ray Rocket (WRXR) launched on 4th April, 2018. The secondary payload was the REX LE X-ray Telescope. The REX LE X-ray telescope consists of two X-ray telescopes with 1D and 2D optics, a single visible-light camera and an IR grid-eye. The primary structure consists of a metal housing for the optics and more...

Thorsten Döhring: Methods of coating stress compensation for iridium based X-ray mirrors

Iridium-based coatings for mirrors of spaceborn X-ray telescopes were studied in a cooperation between Aschaffenburg University (Germany) and the Institut Fresnel in Marseille (France). In particular, the stress induced deformation of thin glass substrates by magnetron sputtered iridium layers has been characterized and shown to be compressive and equal to about -1786 MPa. Two methods for stress compensation are then studied. One relies on the deposition of silica on the back surface of the substrate and a second one relies more...

Richard Willingale: An X-ray Test Station for Micro Channel Optics

Micro Channel Optics with square pores are used to produce lobster eye X-ray mirrors. We will describe a dedicated facility designed and built to characterise the full performance of MCOs in X-rays. A single simple test using the facility gives information on the radius of curvature, efficiency and angular resolution of the MCO. It is intended that such a test station is used during the manufacture of MCOs to improve the quality of the final optics and as part of more...

Marta Civitani: Full shells for Lynx Mirror Assembly

Vladimir Tichy: Analytic calculation of performance of lobster eye

An analytic model allowing calculation of effective collecting area of lobster eye optics is presented. The effecitve collecting area can correspond to spot only or to full point spread function. Equations for optimizing of the effective collecting area are presented. Examples are presented. Differences between results for the Angel and the Schmidt lobster eye design are discussed.

Herman Marshall: Methods for Soft X-ray Polarimetry

I will describe development and testing of components to be used to measure the polarization of soft X-rays for astronomical applications. We have acquired and tested multilayer coated mirrors with a lateral grading in order to match them to the dispersion of a grating-based spectrometer. We have demonstrated methods for the 0.15-0.40 keV band. We are also working on new components to expand the bandpass to 1-2 keV.

Herman Marshall: Optics for the Imaging X-ray Polarimetry Explorer (IXPE)

On behalf of the collaboration, I will describe the instrumentation of a NASA mission, the Imaging X-ray Polarimetry Explorer. The instrument, expected to launch in early 2021, would be the first in over 40 years to measure X-ray polarization of astronomical sources in the 2-8 keV band. IXPE will have full-shell optics with half-power diameter of less than 30 arc seconds from the Marshall Space Flight Center and photoelectron tracking detectors from Italy funded by ASi. I more...

Tomáš Báča: VZLUSAT-1: A Year of Space Radiation Monitoring on the First Czech CubeSat

The VZLUSAT-1 satellite, the first Czech CubeSat, was successfully launched on June 23, 2017, to a 510 km Sun-synchronous low-Earth orbit. It carries several scientific payloads including a Timepix detector as focal plane imager for the X-Ray telescope on board. The Timepix detector contributes significantly to the satellite data collection, with more than 25 000 sampling acquisitions in the first year of deployment. Despite limitations of the satellite attitude control system, necessary for capturing X-Ray images of the Sun, the more...

Wenda Zhang: Probing Bardeen-Petterson effect in tidal disruption events with spectral line reverberation mapping

For inclined accretion flow around rotating black hole, the combined effect of Lense-Thirring precession and viscous torque tend to align the inner part of the flow with the black hole spin, leading to the formation of a warped disc, known as Bardeen-Petterson effect (Bardeen & Petterson 1975). In tidal disruption events (TDEs) in which a super-massive black hole starts to accrete the bound debris, if the black hole is spinning, in general the stellar orbit is inclined with the black more...

Filippo Frontera: The THESEUS mission: science goals, configuration and development status

The THESEUS mission concept, proposed in response to the ESA call for medium-size mission (M5) within the Cosmic Vision Programme, has been selected to enter an assessment (0/A) phase study. The main scientific goals of THESEUS are: a) to explore the Early Universe (cosmic dawn and reionization era) by unveiling a complete census of the Gamma-Ray Burst (GRB) population in the first billion years in order to perform unprecedented studies of the global star formation history of the Universe up more...

Filippo Frontera: The high energy gamma-ray mission concept ASTENA

Within the context of the European project AHEAD, a new concept of high energy mission named ASTENA (Advanced Surveyor of Transient Events and Nuclear Astrophysics) is being performed. The mission includes a large array of broad band (1-20 MeV) Wide Field Monitors with imaging and spectroscopy capabilities (WFM-IS), and a large effective area broad-band (50-700 keV) Narrow Field Telescope (NFT) with focusing capabilities based on the use of an advanced Laue lens with unprecedented sensitivity. ASTENA is expected to be more...

Landgraf Boris: SPO development for missions as Athena and Arcus

The Silicon Pore Optics (SPO) technology has been established as a new type of x-ray optics that enables future x-ray observatories such as Athena and Arcus. SPO is being developed at cosine together with the European Space Agency (ESA) and academic as well as industrial partners. The SPO optics modules are lightweight, yet stiff, high-resolution x-ray optics, that shall allow missions to reach an unprecedentedly large effective area of several square meters, operating in the 0.2 to 12 keV band more...

Randall McEntaffer: Advancements in reflection gratings for astronomical spectrographs

I will present an overview of the current state of reflection gratings for astronomical spectrographs. This will concentrate on gratings fabricated for X-ray and ultraviolet architectures. The talk will cover the current technological challenges and paths forward. The application of such gratings toward future missions including suborbital rockets, Explorers, and Lynx will also be discussed

Yuichiro Ezoe: Ultra light-weight X-ray telescopes for future Japanese missions

Toward a new era of X-ray astronomy, next generation X-ray optics are indispensable. To meet a demand for telescopes lighter than the foil optics but with a better angular resolution less than 1 arcmin, we are developing micropore X-ray optics based on micromaching technologies. Using hot plastic deformation of silicon wafers, we are also developing mirrors for telescopes as light as foil optics but with better resolution. In this talk, I will review our development.

Bernd Aschenbach: QPOs of black holes explained by frequency resonances of epicyclic motions in the accretion disk

Over more than 15 years QPOs, both twin QPOs but also single QPOs, have been observed at high and low frequencies. The associated black holes have masses ranging from stellar size to supermassive galactic nuclei. This group, despite the large range of masses, is fairly small in number. I suggest that this distinctiveness is the result of a common parameter and this is the maximum spin a black hole can manage.

Yong Chen: Progress of Follow-up X-ray Telescope onboard Einstein Probe mission

The Follow-up X-ray Telescope (FXT) onboard Einstein Probe is responsible for the quick follow-up observation of the triggered sources and pointed observations of other targets. FXT is a Wolter-I type telescope operating in 0.5-10 keV. It has a narrow field of view (38 arcmin in diameter) and 4 arcsec source localization error in the detector coordinate system. The mirror assembly and the electron diverter will be provided by ESA as the contributions for collaboration. The FXT detector system consists of two more...

Yanji Yang: Development of X-ray Optics of Spectroscopic Focusing Array onboard the enhanced X-ray Timing and Polarimetry mission (eXTP)

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Drew Miles: Preliminary design of a new diffuse soft X-ray spectrometer for sounding rockets (poster)

I will present an early look at the design of a soft X-ray spectrometer designed to observe diffuse sources from a sounding rocket. The funded payload is estimated to launch in 2021. I provide here an update on the optical design, efforts in grating development, and detector solutions for the instrument.

Nozomi Nakaniwa: Development of a silicon mirror for future X-ray missions using the hot plastic deformation process

Silicon has a potential to be used for an X-ray mirror substrate, since it is material of low density and high mechanical stiffness, and its wafer with quite smooth surface is commercially available. Moreover, silicon has ductility near its melting point, it is possible to deform with its surface smoothness unchanged. Utilizing this characteristic, we have been manufacturing a conical silicon mirror from its wafer by means of the hot plastic deformation technique. Our mirror is the conical silicon mirror more...

Nozomi Nakaniwa: Development of a silicon mirror for future X-ray missions using the hot plastic deformation process

Silicon has a potential to be used for an X-ray mirror substrate, since it is material of low density and high mechanical stiffness, and its wafer with quite smooth surface is commercially available. Moreover, silicon has ductility near its melting point, it is possible to deform with its surface smoothness unchanged. Utilizing this characteristic, we have been manufacturing a conical silicon mirror from its wafer by means of the hot plastic deformation technique. Our mirror is the conical silicon mirror more...

Vadim Burwitz: AHEAD: the Project and its Joint Research Activity on X-ray optics

An overview of the european unions H2020 AHEAD project will be given. Followed by an overview of the work done within the AHEAD joint research activity on X-ray optics in conjunction with PANTER X-ray test facility on the characterisation and simulation of different X-ray optics technologies. Also the positive impact of AHEAD on the development of the BEaTRiX test facility for testing silicon pore optic will be discussed.

Vladimír Karas: Orbiting blobs in SMBH accretion discs in the era of high-angular resolution and polarimetry

Energy shifts of radiation are caused by the fast orbital motion and the gravitational redshift near a supermassive black hole (SMBH). Individual clumps of matter experience the effects of general relativity (GR) as they gradually proceed towards the event horizon. The supply of material is maintained by episodic tidal disruption events (TDE). The emerging radiation is modulated in the X-ray domain as well as in longer wavelengths. Changes of polarization properties of the observed signal exhibit a specific dependence on more...

Vladimír Karas: Modelling the jet kinematics of OJ287 (poster)

OJ287 belongs to one of the best candidates among active galactic nuclei to host the binary supermassive black hole at very close separation. Based on a recent analysis of 120 VLBA (Very Long Baseline Array) observations by Britzen et al. (2018), we set up a basic kinematical model to explain the motion of jet components. The model involves the jet precession, on top of which we find an indication of additional nutation-like motion for the first time. An alternative explanation more...

Benjamin Donovan: Performance testing of X-ray reflection grating prototypes for the Off-plane Grating Rocket Experiment

The soft X-ray spectrometer payload onboard the Off-plane Grating Rocket Experiment (OGRE) hopes to achieve the highest resolution soft X-ray spectrum of an astrophysical object when it is launched via suborbital rocket. Paramount to the success of the spectrometer are the performance of its >200 reflection gratings populating its reflection grating array. Two prototype gratings for the payload were manufactured using different electron-beam lithography techniques and were evaluated for performance at the PANTER X-ray Test Facility. Results from the test more...

William Zhang: Next Generation Astronomical X-ray Optics: High Resolution, Light Weight, and Low Cost

The state of the art of astronomical X-ray optics, represented by the three currently operating missions,Chandra, XMM-Newton, and NuSTAR, requires tradeoffs among three highly desirable quantities: 1) angular resolution, 2) effective area, and 3) production cost. For example,Chandra’s mirror assembly, produced at an extremely high cost, is optimized for angular resolution at the expense of effective area. NuSTAR’s, however, produced at a very low cost, is optimized for large effective area at the expense of angular resolution. XMM-Newton’s, taking the more...

Richard Willingale: Development of the lobster eye telescope onboard the Einstein Probe Mission

Authors: The WXT team of Einstein Probe The Einstein Probe (EP) is a small satellite dedicated to time-domain astronomy to monitor the sky in the soft X-ray band. It is a mission led by the Chinese Academy of Sciences and developed in its space science programme with international collaboration. Its wide-field imaging capability is achieved by using established technology of the micro-pore lobster-eye X-ray focusing optics. Complementary to this is deep X-ray follow-up capability enabled by a Wolter-I type X-ray telescope. more...

Thorsten Döhring: Optics development for X-ray astronomy – a review on four joint Bavarian-Czech projects (poster)

Between 2016 and 2018 the Bavarian-Czech Academic Agency (BTHA) funded four bilateral projects between Aschaffenburg University and CVUT Prague. The effective combination of equipment, know-how, and manpower of both partners resulted in the development of stress-compensated iridium coatings for astronomical X-ray mirrors. The findings have been published at scientific conferences and in several joint papers. This poster gives a review on these collaborations and an outlook to the future.

Ladislav Pína: X-ray optics for astrophysical applications

Presented work addresses the issue of X-ray optics for astrophysical applications. Various wide-field optical systems have been studied and developed. Two of them were used in space. One optical system is based on the use of 1D \"Lobster eye\" optics as a part of the project VZLUSAT-1 CubeSat which is still operational on the polar orbit. The other one is based on the use of 2D \"Lobster eye\" optics. This optical system was used in a student rocket experiment at more...

Rene Hudec: KB X-ray Optics in AHEAD Project (poster)

We will briefly present and discuss the task of design, development and tests of KB (Kirkpatrick Baez) X-ray Optics within EU AHEAD Project

Brandon Chalifoux: Film stress compensation and mirror mounting stress relief

The Lynx X-ray Observatory mission concept will require a telescope with high resolution (~0.5 arc-sec HPD) and a large effective area (> 2 sq. meters). One path to achieving this is to use thin segmented mirrors assembled into a telescope mirror assembly. One of the major challenges with using segmented mirrors is that film stress, intrinsic to a reflective film such as iridium, deforms mirrors well beyond what would be required for Lynx. This stress may be non-uniform and non-repeatable. more...

Mikhail Pavlinsky: Overview of ART-XC / SRG instrument

Spectrum Roentgen Gamma (SRG) is an X-ray astrophysical observatory, developed by Russia in collaboration with Germany. The mission will be launched in March 2019 from Baikonur and placed in a 6-month-period halo orbit around L2. The scientific payload consists of two independent telescope arrays – a soft-x-ray survey instrument, eROSITA, being provided by Germany and a medium-x-ray-energy survey instrument ART-XC being developed by Russia. ART-XC will consist of seven independent, but co-aligned, telescope modules. The ART-XC flight mirror modules more...

Ikuyuki Mitsuishi: Electroformed grazing incidence x-ray optics for SuperDIOS (poster)

The 6th Japanese-led international X-ray observatory, Hitomi, revealed the power of imaging and high-resolution X-ray spectroscopy even though the F.O.V. is limited to <10 arcmin^2. Thus, to conduct X-ray sky survey missions with microcalorimeters such as SuperDIOS in the future, X-ray optics with large effective area and F.O.V. and modest angular resolution are essential. To realize such missions, we have started developing electroformed grazing incidence X-ray optics. In this poster, we will show you the recent status of our development.

Raul Riveros: Manufacture of Lightweight Silicon X-ray Mirrors for High-Resolution X-ray Astronomical Optics

At NASA Goddard Space Flight Center, we are developing a manufacturing process capable of producing lightweight sub-arcsecond X-ray mirrors made of directly polished single crystal silicon. Silicon is a nearly-ideal material for this application because it has high stiffness, low density, high thermal conductivity, zero internal stress, and commercial availability. Our manufacturing process involves traditional grinding, lapping, and polishing methods adapted to X-ray mirror geometry. This manufacturing process promises to meet the angular resolution, mass, cost, optical design, and schedule more...

Ondrej Nentvich: Dataprocessing of 1D lobster-eye Optics and Their Combination (poster)

Lobster-eye optics is one of the X-ray telescopes which could be used as a wide field detector to catch fast transients or gamma ray bursts. Proposed algorithm is based on 1D optics with shading mask on input aperture.

Martin Urban: Temperature Dependence of the Pixel Threshold for the Timepix Detector: Preliminary Results (poster)

Timepix detector, as well as any other semiconductor detector, is affected by noise in the semiconductor structure. This poster describes very first results of the Timepix equalization and its validity under different conditions.

Petr Suchanek: SEU and spectroscopic measurements using novel monilithic PDSoI pixel radiation detectors (poster)

Petr Suchanek: The SpacePix radiation monitor (SXRM) (poster)

Petr Suchanek: X-CHIP-03 SOI MAPS Radiation Sensor with hit-counting and ADC mode (poster)