A5066776809- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Astronomy and Astrophysical Research
- SAS software applications and methods
- Astronomical Observations and Instrumentation
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- History and Developments in Astronomy
- Adaptive optics and wavefront sensing
- Astro and Planetary Science
- High-pressure geophysics and materials
- Space Satellite Systems and Control
- CCD and CMOS Imaging Sensors
- Solar and Space Plasma Dynamics
- Geophysics and Sensor Technology
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Historical Astronomy and Related Studies
- transportation and logistics systems
- Seismology and Earthquake Studies
- Dark Matter and Cosmic Phenomena
- Atmospheric Ozone and Climate
- Transportation Systems and Safety
National Centre for Nuclear Research
2012-2024
Max Planck Institute for Extraterrestrial Physics
2008-2016
National Institute for Astrophysics
2016
Centrum Badań Jakości
2011-2014
Institute of Geodesy and Cartography
2014
Military University of Technology in Warsaw
2014
University of Warsaw
2000-2010
Palo Alto Veterans Institute for Research
2010
Centrum Badań Kosmicznych
2009
Polish Academy of Sciences
2003-2009
This paper presents the set of plane-parallel model atmosphere equations for a very hot neutron star (X-ray burst source). The assume both hydrostatic and radiative equilibrium, equation state an ideal gas in local thermodynamic equilibrium (LTE). transfer includes terms describing Compton scattering photons on free electrons fully relativistic thermal motion, photon energies approaching . Model take into account many bound-free free-free energy-dependent opacities hydrogen, helium, iron...
The primary scientific goal of the GRIPS mission is to revolutionize our understanding early universe using γ-ray bursts. We propose a new generation gamma-ray observatory capable unprecedented spectroscopy over wide range energies (200 keV–50 MeV) and polarimetry (200–1000 keV). sensitivity nuclear absorption features enables measurement column densities as high 1028cm − 2. Secondary goals achievable by this include direct measurements all types supernova interiors through γ-rays from...
Thermal dominated X-ray spectra of neutron stars in quiescent transient binaries and that undergo thermonuclear bursts are sensitive to mass radius. The mass-radius relation depends on the equation state governs their interior. Constraining this accurately is thus fundamental importance understand nature dense matter. In context we introduce a pipeline calculate realistic model rotating with hydrogen helium atmospheres. An arbitrarily fast star given generates spacetime which atmosphere...
One of the possible approaches to detecting optical counterparts GRBs requires monitoring large parts sky. This idea has gained some instrumental support in recent years, such as with "Pi Sky" project. The broad sky coverage apparatus results from using cameras wide-angle lenses (20x20 deg field view). Optics this kind introduce significant deformations point spread function (PSF), increasing distance frame centre. A deformed PSF additional uncertainties data analysis. Our aim was create a...
The "Pi of the Sky" robotic telescope has been designed for monitoring a significant fraction sky with good time resolution and range. main goal detector is to look short timescale optical transients arising from various astrophysical phenomena, mainly counterparts Gamma Ray Burst (GRB). System design, observations methodology as well developed algorithms also make this sophisticated instrument looking novae supernovae stars blasars AGNs activity. Final consists two sets 16 cameras, one...
“Pi of the Sky” experiment has been designed for continuous observations a large part sky, in search astrophysical phenomena characterized by short timescales, especially prompt optical counterparts Gamma Ray Bursts (GRBs). Other scientific goals include searching novae and supernovae stars monitoring blasars AGNs activity. is fully autonomous, robotic detector, which can operate long periods time without human supervision. A crucial element detector an advanced software real‐time data...
Compton scattering is the dominant opacity source in hot neutron stars, accretion disks around black holes and coronae. We collected here a set of numerical expressions redistribution functions for unpolarized radiation (RF), which are more exact than widely used Kompaneets equation. The principal aim this paper presentation RF by Guilbert (1981) corrected computational errors original paper. This was series papers on model atmosphere computations stars. have also organized four existing...
A large fraction of accreting black hole and neutron star systems present clear evidence the reprocessing X-rays in atmosphere an optically thick accretion disk. The main hallmarks X-ray reflection include fluorescent K-shell emission lines from iron (∼6.4–6.9 keV), absorption K-edge (∼7–9 a broad featureless component known as Compton hump (∼20–40 keV). This is produced result scattering high-energy photons (E ≳ 10 keV) relatively colder electrons (Te ∼ 105–107 K) disk, combination with...
We presented preliminary results for our catalogue of the variable stars from 2006-2007 "Pi Sky" data. Our contains more than 1 000 different type. The most numerous group in are eclipsing variables (515) whereas pulsating less (292). Significant consists classified simply as "variable" (180). For these we can not be able to determine detailed type variability. classification was based on shape light curve, GCVS catalogue. However, some were differently
Pi of the Sky" is a robotic telescope project aiming for continuous observation large part sky with high temporal and optical resolution using wide field-of-view instruments.Its primary goal to look afterglows associated gamma ray bursts (GRB), but it also well suited study any kind short time scale astrophysical phenomena.Due online data analysis in real time, has selftriggering capability can react external triggers no delay.The prototype two cameras been installed at Las Campanas...
Pi of the Sky is a system robotic telescopes designed for observations short timescale astrophysical phenomena, e.g. prompt optical GRB emissions. The apparatus to monitor large fraction sky with 12–13 m range and time resolution order 1–10 seconds. In October 2010 first unit new detector was successfully installed in INTA El Arenosillo Test Centre Spain. We also moved our prototype from Las Campanas Observatory San Pedro de Atacama March 2011. status performance both detectors presented.
Gamma-Ray Bursts (GRB) are short impulses of gamma radiation (time duration ranges from 0.1 to 100 s) distributed almost isotropically across the sky. Most probably they arise during explosions or collisions stars at cosmological distances. In this paper we discuss their origin, properties and current models. The methods observations will be also described. At end summary "Pi Sky" GRBs presented, mainly focused on naked-eye burst GRB080319B.
Context. General relativity strongly affects the observed spectra of compact objects. New models hot nonrotating neutron star (NS) atmospheres are presented for various chemical compositions. We demonstrate influence strong gravity on value hardening factor measured by a distant observer. Aims. prepare new X SPEC fitting packages based our extended numerical NS in order to use them spectral analysis X-ray domain. For Schwarzschild metric, ray-tracing calculations were performed determine...
In this paper we show that X-ray spectral observations of the ATHENA mission, which is planned to launch in 2031, can constrain equation state (EOS) superdense matter. We use our well-constrained continuum-fitting method determine mass and radius a neutron star. Model spectra emission from star were calculated using atmosphere code ATM24. next step, those models fitted simulated for ATHENA's Wide Field Imager (WFI) detector, satellite calibration files. To simulate assumed three different...
In October 2010 Pi of the Sky set up a new system, consisting 4 cameras installed on mount, in El Arenosillo, southern Spain. It was followed by moving prototype system from Las Campanas Observatory (central Chile) to San Pedro de Atacama (northern March 2011. this paper our sites, some details about observational conditions and first results both observatories are described.