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hard x-ray imaging spectroscopy with nustar has provided new insights into a broad range of astrophysical phenomena. several technological breakthroughs enable an extremely powerful follow-up mission. members of our team fabricated a 256-pixel transition edge sensor (tes) microcalorimeter array with microwave multiplex... | transition edge sensor arrays for high-energy x-ray and gamma-ray astronomy |
in the past years xmm-newton revolutionized our way to look at the x-ray sky. with more than 200 ms of exposure, it allowed for numerous discoveries in every field of astronomy. unfortunately, about 35% of the observing time is badly affected by soft proton flares, with background increasing by orders of magnitudes ham... | a novel approach to model epic variable background |
we present continuation of the multi-wavelength (from x-ray to optical) monitoring of the nearby changing look (cl) active galactic nucleus in the galaxy ngc 1566 performed with the neil gehrels swift observatory,the master global robotic network over the period 2007-2019. we also present continuation of optical spectr... | discovery of new changing look in ngc 1566 |
most of our spectra of rx j0440.9+4431 were obtained with the 2.16m telescope at xinglong station of national astronomical observatories. the optical spectroscopy with an intermediate resolution was made with a ccd grating spectrograph at the cassegrain focus of the telescope. we took the red spectra covering from 5500... | vizier online data catalog: photometry and spectroscopy of ls v+44 17 (yan+, 2016) |
we describe the 10-day radio observations of the gamma-ray pulsar j1836+5925. observations were carried out on the pushchino radio astronomical observatory at the frequency of 111 mhz using the large phased array of the lebedev physical institute. | observations of the gamma-ray pulsar j1836+5925 at 111 mhz |
comet 2i/borisov is the second interstellar object discovered while crossing our solar system. the object already had a prominent dust tail when first observed at 2.98 au from the sun, indicative of sublimating volatiles, and cn was detected at 2.7 au from the sun (fitzsimmons et al. 2019). while the early characteriza... | swift/uvot observations of interstellar comet 2i/borisov |
charge-coupled devices have been the detector of choice for soft x-ray astronomy missions for many decades due to excellent energy resolution, noise performance, and longevity in space. newer ccd-based missions require everincreasing performance which is made challenging by radiation damage inherent to the space enviro... | predicting the performance benefit of multi-level clocking in ccds using the active trap model |
because the earth's atmosphere is not transparent for the most of the electromagnetic waves, space astronomy was born in 1960s to complement ground-based observations and to provide us with multiwavelength data from gamma-ray to radio. most space observatories work in gamma-ray, x-ray, uv and ir, as well as there are a... | multiwavelength space astronomy |
we present findings on the development of hybrid cadmium telluride (cdte) detectors for applications in space-based x-ray astronomy. in addition to presenting the components and design of the detectors, which consist of 2cm × 2cm × 2mm cdte crystals mounted on a custom asic, we also determine their viability for scient... | development of cadmium telluride detectors for hard x-ray astronomy |
in 2022, the astronomical observatory had 72 employees, including 51 full-time and 21 part-time workers, 40 scientists (11 doctors of science and 15 candidates of science), including 20 full-time and 20 part-time workers. during the year, 5 budget topics were implemented. main scientific results. the observational data... | astronomical observatory of taras shevchenko national university of kyiv in 2022 |
the advanced ligo and virgo detectors have recently ushered in the age of gravitational wave astronomy. in this dissertation we briefly review how gravitational waves arise from general relativity, how they are produced, and how they are detected with ligo. we also review the connection between gravitational waves and ... | search for gravitational wave signals associated with gamma-ray bursts during ligo's second observing run |
*pyirf* is a python3-based library for the generation of instrument response functions (irfs) and sensitivities for the cherenkov telescope array (cta) | cta-observatory/pyirf: v0.7.0 – 2022-04-19 |
the athena x-ray observatory mission has been conceived to study the hot and energetic universe. this includes determining the physical and chemical evolution of the hot baryonic component in the universe, assembling into the gravitational potential wells in large-scale structures as well as the phenomena generated aro... | the athena science case in context |
numerous scientific questions at the forefront of our modern physical understanding require enhanced x-ray astronomical observations beyond the capabilities of existing x-ray telescopes. these observations demand spaceborne x-ray telescopes of unprecedented imaging power. x-ray focusing optics which are simultaneously ... | fabrication of lightweight silicon x-ray mirrors |
the detection of gravitational waves (gws) originating from a black hole (bh) binary merger in 2015 by ligo marked the beginning of the age of gw astronomy. another defining moment came in 2017 with the joint detection of gws and their electromagnetic (em) counterpart, beginning with a short gamma ray burst (sgrb), fro... | compact stellar mergers: the origin and electromagnetic counterparts of gravitational waves |
we investigate the nonequilibrium properties of both a non-maxwellian electron distribution and nonequilibrium ionization in the plasma sheet observed on 2017 september 10. we apply a kappa (κ) electron velocity distribution (non-maxwellian), which represents supra-thermal populations, to find the temperature and densi... | nonequilibrium properties in the plasma sheet observed on 2017 september 10 |
the next generation of large x-ray astronomical missions (e.g. the lynx great observatory and axis probe class mission concepts) are planned to have an order-of-magnitude larger collecting areas combined with exquisite mirror quality, enabling unprecedented exploration of the faint and high redshift x-ray universe. an ... | development and characterization of fast low noise x-ray detectors for the next generation astronomical observatories |
it is now well-established that most galaxies are host to a supermassive black hole (smbh) at its galactic center. a few percent of galaxies, collectively known as active galaxies, host an actively accreting black hole. blazars are a small fraction of active galaxies that are of radio-loud and exhibit relativistic jets... | determining the location of the gamma-ray emission zone in powerful blazars |
microcalorimeters offer exciting opportunities for x-ray astronomy, with energy resolution that is about a factor of 100 better than the silicon ccds, which is the current work-horse detector technology being used in x-ray imaging spectrometer satellite missions such as chandra and xmm. the recent astrophysics decadal ... | development of next-generation wiring capability for advanced x-ray microcalorimeters |
since the first discovery of a black hole, cygnus x-1, x-ray astronomy has offered a unique probe into the nature of compact objects. vast amounts of high energy photons are emitted in the regions close to the black hole, producing distinct features in the x-ray spectra that carry crucial physical information of the co... | relativistic accretion disk reflection models for the new era of x-ray astronomy |
eta carinae is the most massive and luminous stellar system within 3 kpc. it is a known binary system with an orbital period of 5.52 years in which bright, thermal, x-ray emission is produced by a strong shock driven by the collisions of the wind of the visible primary star with the thin, fast wind of an otherwise unse... | much nicer monitoring of the x-ray spectrum of eta carinae |
supernova 1987a, the brightest supernova since kepler's in 1604, was detected 30 years ago at a distance of 160 000 light years in the large magellanic cloud, a satellite galaxy of the milky way. visible with the naked eye and detected with the full range of technology constructed since kepler's time, sn 1987a has cont... | supernova 1987a: the supernova of a lifetime |
the highly active m dwarf star, yz cmi, was simultaneously observed by the transiting exoplanet survey satellite (tess), the neil gehrels swift observatory (swift), and the very large array (vla) in 2019 january. an extreme flaring event (>24 minutes, ~7.6x1031 erg) occurred on 2019 january 25 that was detected by a... | simultaneous multiwavelength observations of the highly active m dwarf yz cmi |
this program advances the technology readiness of electron-beam lithography (ebl) and koh processes for manufacturing a new line of highly efficient, low scatter blazed gratings for high-resolution ultraviolet (uv: 900 - 2000 angstroms) astrophysics. standard manufacturing techniques for uv blazed gratings (e.g., mecha... | high efficiency, high-dynamic range uv blazed gratings for nasa's next generation space observatories |
the solar ultraviolet irradiance is a primary energy input into earth's atmosphere to influence its photochemistry and dynamics. the nasa solar radiation & climate experiment (sorce) mission ended in february 2020, and its final data products of solar irradiance are being archived this year. we present the latest u... | the final sorce solstice and xps calibrations and data products |
the construction of the beatrix (beam expander testing x-ray) facility is ongoing at inaf/osservatorio astronomico di brera. the facility will generate a broad (170 x 60 mm2 ), uniform and low-divergent (1.5 arcsec hew) x-ray beam within a small lab (∼ 9 x 18 m2 ), using an x-ray microfocus source, a paraboloidal mirro... | progress in the realization of the beam expander testing x-ray facility (beatrix) for testing athena's spo modules |
the provision of scientific data archives and analysis tools by diverse institutions in the world represents a unique opportunity for the development of scientific activities. an example of this is the european space agency's space observatory xmm-newton with its science operations centre at the european space astronom... | el programa de fortalecimiento de capacidades de cospar |
the current generation of gamma-ray instruments have produced a treasure trove of astrophysical discoveries. among them are a new class of objects tentatively designated high-mass gamma-ray binaries (hmgbs). thought to be systems containing the colliding wind of a massive star and a young pulsar, these objects are dist... | toward an understanding of high-mass gamma-ray binaries: an investigation using current observatories and the development of a future gev instrument |
just about 40 years ago, a group of x-ray astrophysicists at the goddard space flight center sought a way to improve the energy resolution of non-dispersive x-ray spectrometers for the axaf observatory (now chandra). what emerged was something entirely different - the thermal detection of individual x-rays and measurin... | the challenges of developing a new approach to high-resolution x-ray spectroscopy |
following the detection of grb 220826a by swift and its x-ray and optical counterparts (caputo et al., gcn 32484; kuin et al., gcn 32488; romanov f.p., gcn 32487), the 1m lesedi optical telescope located at sutherland, south africa, obtained 600 s exposures in each of the g,r,i and z bands with the mookodi low-resoluti... | grb 220826a: lesedi optical afterglow detection |
we analyzed 0.1-300gev data taken with fermi-lat between 2008 august 4 and 2021 may 5 (mjd54683-59339) to generate 3 day binned γ-ray light curves and spectra. we extracted the 0.3-10kev spectra from the observations taken with the neil gehrels swift x-ray telescope in the time interval mjd54683-59339. data from the sw... | vizier online data catalog: multiwavelength data for blazars 3c 279 & 3c 454.3 (paliya+, 2021) |
the cherenkov telescope array will be ten times more sensitive with respect to current generation imaging cherenkov telescopes and will have unprecedented accuracy in its detection of very-high-energy gamma rays in the energy range from 20 gev to 300 tev. cta is designed to detect gamma rays over a larger area with mor... | the cherenkov telescope array: status and perspectives |
the new era of non-dispersive, high-resolution x-ray microcalorimeter missions, including xrism (2023) and athena, will revolutionize x-ray astronomy. xrism is expected to have a spectral resolution 20-40 times higher than ccds onboard current observatories, and a significantly increased bandpass and collecting area co... | preparing for future observatories with an ebit facility |
we present a 6u-size cubesat x-ray observatory, ninjasat, scheduled to be launched into a low-earth orbit in february 2023. x-ray astronomy has been promoted by large satellites equipped with highly sensitive instruments. however, the observation time of large satellites is shared among many users and is therefore limi... | ninjasat: 6u-size cubesat observatory for monitoring bright x-ray compact objects |
ground-based gamma-ray observatories such as the cherenkov telescope array presents new challenges for astronomical data analysis. the dynamics of the atmosphere and the complexity of cherenkov shower are two uncertainty sources that needed to be embraced rather than corrected. as each telescope only has access to a se... | cherenkov shower detection combining probability distributions from convolutional neural networks |
*pyirf* is a python3-based library for the generation of instrument response functions (irfs) and sensitivities for the cherenkov telescope array (cta) | cta-observatory/pyirf: v0.5.0 |
cherenkov telescope array (cta) is the project of a global astronomical observatory studying the universe in very high energy gamma rays. the international cta consortium involves researchers from 32 countries from 5 continents. a large polish consortium of the cherenkov telescope array project is formed by 13 scientif... | progress of the cherenkov telescope array project in poland |
the smithsonian astrophysical observatory (sao) in collaboration with stanford research institute (sri) has been developing monolithic cmos detectors for use as astronomical soft x-ray imaging spectrometers since 2008. the long term goal of this collaboration is to produce x-ray active pixel sensor (aps) detectors with... | monolithic cmos detectors for use as x-ray imaging spectrometers |
we present a detailed multiband photometric study of five galaxies, selected from a sample of low luminosity early-type galaxies from b2 sample, which have mpg = 15.7, mv = 16.5, redshifts up to 0.2, radio powers p408 = 1023 - 1026.5 w hz-1 and between 1022 - 1025 w hz-1 at 1.4 ghz. we have used observed bvr and hα ima... | multicolor surface photometry of a sample of low luminosity radio galaxies |
the advanced telescope for high energy astrophysics (athena) mission is a major upcoming space-based x-ray observatory due to be launched in 2028 by esa, with the purpose of mapping the early universe and observing black holes. background radiation is expected to constitute a large fraction of the total system noise in... | mitigation strategies against radiation-induced background for space astronomy missions |
concepts for future space-based x-ray observatories call for a large effective area and high angular resolution instrument to enable precision x-ray astronomy at high redshift and low luminosity. hybrid cmos detectors are well suited for such high throughput instruments, and the penn state x-ray detector lab, in collab... | small pixel hybrid cmos x-ray detectors |
following the detection by swift of grb 221202a and its x-ray counterpart (caputo et al., gcn 33005), the 0.6m wide-field meerlicht telescope, located at sutherland, south africa, obtained 5x300s observations in the q,z,i,r,g bands beginning at 21:14:34 ut on 2022 december 2, approximately 1.14 hours after the swift tr... | grb 221202a: meerlicht upper limits |
gamma-ray astronomy has been one of the prime scientific research fields of the max-planck institute for extraterrestrial physics (mpe) from its beginning. over the years, the entire gamma-ray energy range accessible from space was explored. the purpose of this review article is to summarise the achievements of the gam... | half-a-century of gamma-ray astrophysics at the max-planck institute for extraterrestrial physics |
using the fermi data server, the newest pass 8 fermi-lat data of pks1502+106 from 2014 october 10 to 2018 october 10, are acquired. see section 2.1. we also search for the available swift observations from the astronomical archival data retrieval service provided by the high energy astrophysics science archive research... | vizier online data catalog: 2014-2018 multiwavelength obs. of pks 1502+106 (ding+, 2019) |
we present a study of the heating in ar12333 due to small microflares between 10:30 and 13:30ut on 29 april 2015. this region is well observed in euv by the solar dynamics observatory/atmospheric imaging assembly (sdo/aia) as well as hinode's x-ray telescope (xrt) operating in a higher cadence mode, switching through t... | euv & x-ray observations of microflare heating of ar12333 |
the swift satellite is a multi-wavelength observatory specifically designed for gamma-ray burst (grb) astronomy that is operational since 2004. swift is also a very flexible multi-purpose facility that supports a wide range of scientific fields such as active galactic nuclei, supernovae, cataclysmic variables, galactic... | the seven year swift-xrt point source catalog (1swxrt) |
l-shell dielectronic satellite lines were recently identified in the spectrum of capella observed with the chandra x-ray observatory [1,2]. although the observed features were weak, they can add to the background between the prominent lines, as discussed for the case of fe xviii [1]. moreover, the fe xvii dielectronic ... | dielectronic satellite lines of fe xvii |
the second half of the twentieth century has witnessed a tremendous development in the field of astronomy and space exploration. the large telescope both on the land and in the orbit, using the whole range of the electromagnetic spectra from radio waves to gamma rays are extending their range of exploration, right to t... | iau project and research activity in nepal |
a profound difference has occurred in the analysis of grbs initially analyzed in the domain of gamma-ray astronomy with the compton gamma ray observatory and the batse detector with the extension to x-ray astronomy and optical astronomy introduced by beppo-sax and the kek and vlt optical observatory, followed by the ag... | on the nature of the ultrarelativistic prompt emission phase of grb 190114c and grb 180720b |
this table details the individual satellite trail detections described and analysed in the paper. (1 data file). | vizier online data catalog: satellite trails on h.e.s.s. astronomical obs. (lang+, 2023) |
gct is a gamma-ray telescope proposed for the high-energy section of the cherenkov telescope array (cta). a gct prototype telescope has been designed, built and installed at the observatoire de paris in meudon. equipped with the first gct prototype camera developed by an international collaboration, the complete gct pr... | gct, the gamma-ray cherenkov telescope for multi-tev science with the cherenkov telescope array |
the observations were carried out with the karl g. jansky vla of the national radio astronomy observatory on 2012 september 30, october 2-5 under project code sd630. data were taken using the vla's c-band (4-8ghz) receivers in full polarization mode, with two 1ghz basebands centered at 4.736 and 7.336ghz to provide a g... | vizier online data catalog: the population of compact radio sources in onc (forbrich+, 2016) |
in the first part of this thesis we measure the interstellar abundances for the elements o, ne, mg, si, and fe in the large magellanic cloud (lmc), based on the observational data of sixteen supernova remnants (snrs) in the lmc as available in the public archive of the chandra x-ray observatory (chandra). we find lower... | a chandra study of supernova remnants in the large and small magellanic clouds |
thin glass modular mirrors are a viable solution to build future x-ray telescopes with high angular resolution and large collecting area. in our laboratories, we shape thin glass foils by hot slumping and we apply pressure to assist the replication of a cylindrical mould figure; this technology is coupled with an integ... | slumped glass foils as substrate for adjustable x-ray optics |
the large observatory for x-ray timing (loft) is a mission concept exploiting a novel detector solution and constitutes the base for a series of subsequent projects in various states of advancement. thanks to the unprecedented combination of effective area and spectral resolution of its main instrument and the uniquely... | the loft mission concept |
an advanced compton telescope appears to be the best instrument concept for the next generation gamma-ray space observatory in the mev range. a first prototype of advanced compton telescope is being developed to match the constraints of a nano satellite mission, with the scientific objective of measuring gamma-ray burs... | development of an advanced compton telescope for mev-range gamma-ray astronomy |
the current version of the chandra source catalog (csc) continues to be well utilized by the astronomical community. usage over the past year has continued to average more than 15,000 searches per month. version 1.1 of the csc, released in 2010, includes properties and data for 158,071 detections, corresponding to 106,... | the chandra source catalog 2.0 |
sn2014j has provided an opportunity for unprecedented observational coverage in many astronomical bands, and also was sufficiently nearby so that gamma rays were able to contribute to such investigations. this is important, as the primary source of the supernova light is the radioactive energy from about 0.5 m⊙ of 56ni... | sn2014j as seen in radioactive decay gamma rays with integral |
the long duration grb 181201a (mereghetti et al., gcn 23469; khanam et al. gcn 23501) field was observed on 2018-12-11 with the 2-m himalayan chandra telescope (hct) located at indian astronomical observatory, hanle, india. | grb 181201a : optical observations from hct |
binary black hole (bbh) mergers provide a prime source for current and future interferometric gw observatories. massive bbh mergers may often take place in plasma-rich environments, leading to the possibility of a concurrent em signal observable by traditional astronomical facilities. however, many critical questions a... | prompt electromagnetic transients from binary black hole mergers |
grailquest (gamma-ray astronomy international laboratory for quantum exploration of space-time) is an ambitious astrophysical mission concept that uses a fleet of small satellites, whose scientific objectives are discussed below. within quantum gravity theories, different models for space-time quantisation predict an e... | grailquest & hermes: hunting for gravitational wave electromagnetic counterparts and probing space-time quantum foam |
at the beginning of xx century karl schwarzschild defined a method to design large-field aplanatic telescopes based on the use of two aspheric mirrors. the approach was then refined by couder (1926) who, in order to correct for the astigmatic aberration, introduced a curvature of the focal plane. by the way, the realiz... | aplanatic telescopes based on schwarzschild optical configuration: from grazing incidence wolter-like x-ray optics to cherenkov two-mirror normal incidence telescopes |
the beatrix facility is currently in the realization phase at inaf - osservatorio astronomico di brera in merate (italy) and it will be used as demonstrator for the acceptance test (psf and aeff) of the athena mirror modules (mms), with a rate of 3 mms/day. the beatrix facility is a compact x-ray test facility (13m x 6... | thermal simulations for characterization of athena mirror modules with a radiating box in the beatrix facility |
the source of auroral x-ray emission from the jovian polar caps, whether from electron bremsstrahlung or heavy ion precipitation, has been a topic of debate for the past 40 years, beginning with the einstein observatory's first measurement of x-ray emission in 1979. since then the roentgen satellite, chandra x-ray obse... | comprehensive model of jupiter's polar aurora |
the joint detection of gravitational waves (gws) and gamma-rays from a binary neutron star (ns) merger provided a unique view of off-axis gamma-ray bursts (grbs) and an independent measurement of the ns merger rate. comparing the observations of grb170817 with those of the regular population of short grbs (sgrbs), we s... | electromagnetic signals from misaligned short gamma-ray bursts in the dawn of gravitational wave astronomy |
gravitational waves have revealed a wealth of information about distant black holes and neutron stars but they can also provide large-scale insights into how our universe works. a new study explores how gravitational-wave detections may soon resolve the long-lived tension in measurements of our universes expansion.an e... | the call of dark sirens in precision cosmology |
the chandra x-ray telescope first discovered that comets are a source of x-ray emission when it observed the bright comet hyakutake in 1996. this came as a large surprise: how can a cold cloud of gas at 75k emit emission typically associated with plasmas at a temperature of millions of degrees? the emission is the prod... | x-rays in the solar system |
following a ground-based, narrow-band imaging survey of 99 old type i and type iib supernovae (sne) in h alpha in order to detect signatures of late-interaction (10-30 years after explosion) between the sn ejecta and circumstellar material (csm) from the progenitor system, we have identified 10 promising candidates. we... | searching for late-time circumstellar interaction from decades old supernovae |
just last year, the three observatories of the laser interferometer gravitational-wave observatory (ligo)virgo collaboration detected the gravitational-wave signature of two neutron stars colliding. what can we learn from the months of observations made since?on 17 august, 2017, ligo detected this chirp as two neutron ... | a jet from neutron star merger gw170817 |
taurus hill observatory (tho) [1], observatory code a95, is an amateur observatory located in varkaus, finland. the observatory is maintained by the local astronomical association warkauden kassiopeia. tho research team has observed and measured various stellar objects and phenomena. observatory has mainly focused on e... | exoplanet observations in taurus hill observatory - scientific support for research programs |
objectives: we propose to advance our understanding of how diffuse atomic clouds transition to diffuse molecular clouds, an important step in the star formation process. observing this transition is challenging as h2 lacks a permanent dipole moment, making direct detection extremely difficult. also, the commonly used h... | continued laboratory studies of dissociation recombination with cold molecular ions for diffuse cloud studies by nasa astrophysics missions |
grb 140304a was discovered by the niel gehrels swift observatory burst alert telescope (bat) on 2014 march 4 at 13:22:31 ut. the swift x-ray telescope (xrt) began observing the field at 75.2s after the bat trigger, leading to the detection of an x-ray afterglow. xrt continued observing the afterglow for 5.3 days in pho... | vizier online data catalog: a vla study of high-redshift grbs. ii. grb140304a (laskar+, 2018) |
the first identification of the argonium ion ($\rm{arh^+}$) towards the crab nebula supernova remnant was proclaimed by the herschel space observation in the sub-millimeter and far-infrared domain. very recently the discovery of the hydro-helium cation ($\rm{heh^+}$) in the planetary nebula (ngc 7027) has been reported... | fate of identifying noble gas related species in the crab nebula environment |
the cherenkov telescope array (cta) is the next-generation ground-based observatory for gamma-ray astronomy at very high energies. with up to 120 telescopes on two sites, cta will be the world's largest and most sensitive high-energy gamma-ray observatory covering the entire sky. it will consist of a northern array loc... | the cherenkov telescope array observatory comes of age |
we observed fermi j1623-1752 (atel #14948) as part of the thunderkat x-ray binary monitoring program prior to it being reclassified as grb 210928a. the observation was made as 1.3ghz on 30th september 2021 at 17:07:48ut. the 15-minute observation revealed a point source at the xrt position of grb 210928a with a peak fl... | grb 210928a: meerkat detection |
x-ray jets have been observed for years using data from the x-ray telescope (xrt) on the hinode satellite. recently with the launch of the solar dynamics observatory (sdo) it has been possible to observe solar jets over a range of euv of wavelengths using the atmospheric imaging assembly (aia). in this study, we invest... | visibility of hinode/xrt x-ray jets at aia/euv wavelengths, a temperature indicator |
from humble beginnings just over three decades ago, the imaging atmospheric-cherenkov technique (iact) has evolved into an extremely powerful tool for studying gamma-rays emitted by the universe's most violent astrophysical objects at very high energies (vhe; >1010 ev). this technique complements lower-energy observ... | the history of gamma-ray astronomy at the whipple observatory |
lightweight, high angular resolution x-ray optics are a foundational technology for addressing major outstanding questions in modern astronomy. from understanding how supermassive black holes co-evolve with their host galaxies at early cosmic epochs, to probing the kinematics and energetics of shocks via spectrally/spa... | technology maturation for adjustable x-ray mirrors |
a collaboration of scientists across the globe is currently working on research & development for the southern wide-field gamma-ray observatory (swgo), a next-generation gamma-ray facility to be constructed in south america. swgo will provide wide field-of-view coverage with a high duty cycle for a large portion of... | the southern wide-field gamma-ray observatory: a next-generation ground-based survey instrument for gamma-ray astronomy |
the cherenkov telescope array observatory (ctao) is the next generation ground-based observatory for gamma-ray astronomy at very high energies. with initially 64 telescopes at two sites, ctao will be the world's largest and most sensitive high-energy gamma-ray observatory covering the full sky with a northern array loc... | cherenkov telescope array observatory (ctao): the world's first and largest ground-based gamma-ray observatory |
we re-observed the localization region of the short grb 230513a (trigger 705709044, gcn 33793) detected by the gamma-ray burst monitor (gbm) on the fermi satellite with the palomar 48 inch telescope equipped with the 47 square degree zwicky transient facility (ztf) camera. we obtained a series of g- and r-band images b... | grb 230513a: zwicky transient facility continuous observations of a fermi short grb (trigger 705709044) |
we observed the localization region of the short bright grb 230512a (trigger 705565670, gcn 33778) detected by the gamma-ray burst monitor (gbm) on the fermi satellite with the palomar 48 inch telescope equipped with the 47 square degree zwicky transient facility (ztf; bellm et al., 2019; graham et al., 2019) camera. z... | grb 230512a: zwicky transient facility follow-up of a fermi short grb (trigger 705565670) |
the excellent spatial resolution (~1 arcsecond on-axis) of the chandra x-ray observatory, combined with a reasonable field of view and low instrumental backgrounds, allow detection of serendipitous x-ray sources with a high detectable-source density with low confusion. the aim of the chandra source catalog (csc) is to ... | doing science with the chandra source catalog |
the cherenkov telescope array (cta) is a next-generation observatory for very high energy (vhe) gamma-ray astronomy - a field that has seen remarkable evolution during the last decade. cta's southern array with close to 100 cherenkov telescopes will be located at eso/chile. the presentation will outline the science top... | astronomy at the highest photon energies: the cherenkov telescope array |
spectra are fundamental observation data used for astronomical research, but understanding them strongly depends on theoretical models with many fundamental parameters from theoretical calculations. different models give different insights for understanding a specific object. hence, laboratory benchmarks for these theo... | a small electron beam ion trap/source facility for electron/neutral-ion collisional spectroscopy in astrophysical plasmas |
marxs (multi-architecture-raytrace-xraymission-simulator) simulates x-ray observatories. primarily designed to simulate x-ray instruments on astronomical x-ray satellites and sounding rocket payloads, it can also be used to ray-trace experiments in the laboratory. marxs performs polarization monte-carlo ray-trace simul... | marxs: multi-architecture raytrace xray mission simulator |
the cherenkov telescope array (cta) is a project to build the next generation ground-based observatory for gamma-ray astronomy at very-high energies in the range from 20 gev to 300 tev, which will both surpass the sensitivity of existing instruments in their energy domains and extend the limits of the observed energy s... | cherenkov telescope array: the next-generation gamma ray observatory |
the origin of the mysterious fast radio bursts has eluded us for more than a decade. with the help of a particularly cooperative burst, however, scientists may finally be homing in on the answer to this puzzle.a burst repeatsthe host of frb 121102 is placed in context in this gemini image. [gemini observatory/aura/nsf/... | a new clue in the mystery of fast radio bursts |
the hitomi x-ray observatory was equipped with the soft x-ray spectrometer (sxs), an x-ray microcalorimeter that achieved an energy resolution of 5 ev (@0.5-10 kev) for extended objects. this offered an unprecedented benchmark of atomic modeling and database for hot collisional plasmas, revealing both successes and cha... | the first non-dispersive high-resolution spectroscopy of an x-ray-bright galaxy cluster |
the actual and next decade will be characterized by an exponential increase in the exploration of the beyond low earth orbit space (bleo). moreover, the firsts tentative to create structures that will enable a permanent human presence in the bleo are forecast. in this context, a detailed space radiation field character... | astroparticle experiments to improve the biological risk assessment of exposure to ionizing radiation in the exploratory space missions: a research topic initiative. |
four large size telescopes (lsts) are under construction at the center of the cherenkov telescope array north observatory at roque de los muchachos, la palma, spain, for the advancement of gamma-ray astronomy. the telescopes have a high-resolution and high q.e. camera, fast readout electronics, and a primary reflector ... | highlights of the cta large size telescope project |
this is the second paper in a series dedicated to studies of the x-ray binary cyg x-1 in the heii λ 4686 å line using 3d doppler tomography. a detailed analysis of the tomogram constructed has made it possible for the first time to obtain information about the motions of gaseous flows including all three velocity compo... | analysis of 3d doppler tomography of the x-ray binary system cygnus x-1 from spectral observations in 2007 in the heii λ 4686 å line |
in the framework of newathena x-ray space telescope, beatrix (beam expander testing x-ray) is the novel ground support equipment designed to perform the silicon pore optics mirror modules (spo mms) acceptance tests in terms of point spread function and effective area. as of today, the facility built at inaf-brera astro... | x-ray beam diagnostics at the beatrix facility |
rubin observatory will sit atop the cerro pachn ridge in northern chile, joining gemini south and the southern astrophysical research telescope. [lsst project office]first light for the vera c. rubin observatory atop cerro pachn in chile is fast approaching the eagerly awaited facility is slated to begin observations i... | surveying the universe with rubin observatory |
a central goal of cool-star astronomy is to link the high-energy fuv+x-ray ("xuv") luminosity -- which among other things can affect the local stellar environs, especially orbiting exoplanets -- to properties of the "dynamo" that controls the generation of magnetic flux deep inside spinning, convective stars. in the 19... | activity at the edge |
the nature and complexity of various kinds of astronomical data visualisations can be challenging to communicate with non-experts. the obstacles can become even larger for people who are blind, low vision or learn best via non-visual methods since much of the messaging in astronomical communication hinges on the visual... | an accessibility case study incorporating rich visual descriptions for chandra's high-energy universe |
the primary sample of agn selected in this work is the same as in gupta et al. (2018mnras.480.2861g). it is taken from the bat agn spectroscopic survey (ricci et al. 2017apjs..233...17r, cat. j/apjs/233/17) and then reduced by excluding blazars and compton-thick (lognh>24) agn. such a sample, counting 664 objects, w... | vizier online data catalog: very massive radio-loud and radio-quiet agn (gupta+, 2020) |
the origin of the cosmic diffuse gamma-ray (cdg) background in the 0.3 to 30 mev energy range is a mystery that has persisted for 50 years. the best existing measurements have large systematic uncertainties, and the latest theoretical models based on emission from active galactic nuclei and supernovae differ significan... | the mini astrophysical mev background observatory (mambo) cubesat mission for gamma-ray astronomy |
principal component analysis (pca) and uniform manifold approximation and projection (umap) are among the most common representation learning techniques used in various scientific fields. by reducing the dimensionality of large datasets, representation learning algorithms find lower dimensionality representations of th... | representation learning on a multi-wavelength quasar dataset |
the astri mini-array is a project led by inaf to construct nine imaging atmospheric cherenkov telescopes in order to study gamma-ray sources emitting up to the multi-tev energy band. these telescopes, which will be deployed at the observatorio del teide (tenerife, spain), will be based on the prototype astri-horn teles... | design and development of the supervisor software component for the astri mini-array cherenkov camera |
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