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the iris exposure time calculator (etc) was designed to be a publicly available aid to the astronomical community in the development of science cases for the infrared imaging spectrograph (iris) and future proposal planning. the iris etc is developed from the iris simulator in which the signal-to-noise calculation is d... | the infrared imaging spectrograph (iris) for tmt: exposure time calculator for iris |
for nearly a century, imaging and spectroscopic surveys of galaxies have given us information about the contents of the universe. we attempt to define the logical end point of such surveys by defining not the next galaxy survey but rather the final galaxy survey at near-infrared wavelengths; this would be the galaxy su... | the end of galaxy surveys |
the eso public survey southern h-atlas regions ks-band survey (sharks) comprises 300 square degrees of deep imaging at 2.2 microns (the ks band) with the vista infrared camera (vircam) at the 4-metre visible and infrared survey telescope for astronomy (vista). the first data release of the survey, comprising 5% of the ... | exploring the universe via the wide, deep near-infrared imaging eso public survey sharks |
we developed a scan mirror mechanism (smm) that enable a slit-based spectrometer or spectropolarimeter to precisely and quickly map an astronomical object. the smm, designed to be installed in the optical path preceding the entrance slit, tilts a folding mirror and then moves the reflected image laterally on the slit p... | development of fast and precise scan mirror mechanism for an airborne solar telescope |
this conference presentation was prepared for the optical and infrared interferometry and imaging viii conference at spie astronomical telescopes + instrumentation, 2022. | the expected performance of nulling at the vlti down to five mas |
moons (multi-object optical and near-infrared spectrograph) is a third-generation visible and near-infrared spectrograph for the eso very large telescope, currently nearing the end of the assembly phase. the three channel spectrograph is fed via a fibre positioning module (fpm) which configures the location of 1001 fib... | moons fibre positioning module: instrument build overview |
the lowell discovery telescope (ldt, formerly known as the dct) is a 4.3-m telescope designed and constructed for optical and near infrared astronomical observation. we present the evolution over time of ldt's image quality and ways to improve it, upgrades to the instrument suite, and lessons learned from operating dur... | status of the lowell discovery telescope (ldt) and assessment of the image quality at the focal plane |
we discuss key physical problems related to the interstellar and intergalactic medium, which are the subject of far infrared (fir) and submillimeter (submm) astronomy. we outline the most impressive results of the last 25 years and summarize the characteristics of the most successful space and ground-based fir and subm... | interstellar and intergalactic gas in the far ir and submillimeter spectral ranges |
we present initial results of the first large-scale survey of embedded star clusters in molecular clouds in the large magellanic cloud (lmc) using near-infrared imaging from the visible and infrared survey telescope for astronomy magellanic clouds survey. we explored a ∼1.65 deg2 area of the lmc, which contains the wel... | embedded clusters in the large magellanic cloud using the vista magellanic clouds survey |
astronomical light optical hybrid analysis (aloha@3.39 μm) is a new instrumental concept designed for high angular resolution astronomical imaging in the l band. the originality of our experimental device is to include a frequency conversion process in each arm of the interferometer that frequency shifts the mid-infrar... | in-laboratory aloha mid-infrared up-conversion interferometer in the photon counting regime at λ = 3.39 μm |
teledyne is one of the world's leaders in the provision of infrared sensors for earth science, planetary science, and astronomy. this paper presents teledyne's focal plane array technologies that provide high performance for space missions, with sections on substrate-removed hgcdte (that provides simultaneous visible /... | teledyne's high performance infrared detectors for space missions |
in vhepa (very high energy particle astronomy) 2014 workshop, focused on the next generation explorers for the origin of cosmic rays, held in kashiwa, japan, reviewing and discussions were presented on the status of the observation of gev-tev photons, tev-pev neutrinos, eev-zev hadrons, test of interaction models with ... | ashra neutrino telescope array (nta): combined imaging observation of astroparticles — for clear identification of cosmic accelerators and fundamental physics using cosmic beams — |
the spitzer/infrared spectrograph spectra of three spectroscopically anomalous galaxies (iras f10398+1455, iras f21013-0739, and sdss j0808+3948) are modeled in terms of a mixture of warm and cold silicate dust, and warm and cold carbon dust. their unique infrared (ir) emission spectra are characterized by a steep ∼5-8... | a tale of three galaxies: deciphering the infrared emission of the spectroscopically anomalous galaxies iras f10398+1455, iras f21013-0739, and sdss j0808+3948 |
in this thesis we develop methods for recovering the three-dimensional shape of an object from generalized projections. we particularly focus on the problems encountered when data are presented as discrete image fields. we demonstrate the usefulness of the fourier transform in transferring the image data and shape mode... | shape reconstruction from generalized projections |
in this paper, we present the first extended catalogue of far-infrared fluxes of galactic bubbles. fluxes were estimated for 1814 bubbles, defined here as the 'golden sample', and were selected from the milky way project first data release (simpson et al.) the golden sample was comprised of bubbles identified within th... | first extended catalogue of galactic bubble infrared fluxes from wise and herschel surveys |
the stratospheric observatory for infrared astronomy (sofia), a joint project between nasa and the german aerospace center dlr, provides access to observations of the infrared and sub-millimeter universe. as its development timeline is unique compared to all other nasa astrophysics missions, a milestone called the full... | an overview of the stratospheric observatory for infrared astronomy since full operation capability |
based on the multi-band photometric data of the cosmos (cosmic evolution survey)/ultra vista (ultra-deep visible and infrared survey telescope for astronomy) field, we have selected a mass-limited sample of galaxies with the redshifts of 0 < z < 3.5. and according to the rest-frame uvj twocolor (u-v vs. v-j) crit... | the evolution of star formation of galaxies in the cosmos field1,2 |
the antarctic survey telescopes consists of three different filtered telescopes with 680mm primary mirror and 8 square degree field of view, mainly for observations of supernovas and extrasolar planets searching from antarctic dome a where is anticipated to be the best astronomical site on earth for astronomical observ... | the antarctic survey telescopes ast3 and the ast3-nir |
here i describe 184 mid-infrared detections of supernovae (sne) in co-added images of the neowise mission. 15 of the sne had previously unknown long-lasting mid-ir detections with durations of more than a year. i find 7 sne which have previously unknown sn 2010jl-like mid-infrared evolution. there are also long detecti... | mid-infrared detections of sne ii with neowise |
the sip radical has a \tilde{x}{}2{{\pi }} ground state and a low-lying a{}2{{{σ }}}+ state with a transition wavelength of greater than 20 μm. however, this transition has a near-zero oscillator strength making it all but unobservable. addition of a hydrogen atom to the system creates the strangely bent hpsi molecule ... | bridged hpsi and linear hsip as probes of the sip radical in astrophysical/interstellar media |
estimating the sky background is critical for ground-based astronomical research. in the optical, scattered moonlight dominates the sky background, when the moon is above the horizon. the most uncertain component of a scattered moonlight model is the aerosol scattering. the current, official sky background model for ce... | scattered moonlight observations with x-shooter. implications for the aerosol properties at cerro paranal and the eso sky background model |
the processes of alteration of airless bodies exposed to the space environment are referred to be as "space weathering." multiple agents contribute generally to space weathering, to an extent that depends on the specific location of the surface within the solar system. typical space weathering agents encountered in the... | space weathering induced via microparticle impacts: 1. modeling of impact velocities and flux of micrometeoroids from cometary, asteroidal, and interstellar origin in the main asteroid belt and the near-earth environment |
efficient mirrors with high reflectivity over the ultra-violet, optical, and infra-red (uvoir) spectral range are essential components in future space-based observatories. aluminum mirrors with fluoride-based protective layers are commonly the baseline uv coating technology; these mirrors have been proven to be stable,... | plasma based production of alf3-passivated aluminum mirrors for uvoir astronomy |
we describe the commissioning and operation of a 25 element transition-edge sensor (tes) cryogenic detector array system for use in the far-infrared band of the electromagnetic spectrum. this detector system, supplied by qmc instruments limited, is an integral component to the development of a spatial/spectral double f... | optimization of a cryogenic transition-edge sensor detector array for far-infrared astrophysics |
interstellar ubiquitous infrared spectrum (ir) due to polycyclic aromatic hydrocarbon (pah) was observed in many astronomical dust clouds. a capable astronomical chemical evolution path from graphene to pah was studied based on the first principles calculation. step 1 is a nucleation of nano-carbon after supernova by s... | astronomical chemical evolution from graphene to polycyclic aromatic hydrocarbon reproducing observed infrared spectrum |
the chloroniumyl cation, hcl+, has been recently identified in space from herschel's spectra. a joint analysis of extensive vis-uv spectroscopy emission data together with a few high-resolution and high-accuracy millimeter-wave data provided the necessary rest frequencies to support the astronomical identification. nev... | the high-resolution infrared spectrum of hcl+ |
spherex, a mission in nasa's medium explorer (midex) program that was selected for phase a in august 2017, is an all-sky survey satellite designed to address all three science goals in nasa's astrophysics division, with a single instrument, a wide-field spectral imager. spherex will probe the physics of inflation by me... | the spherex all-sky spectral survey |
"thorium-argon hollow cathode lamps have long been used for wavelength calibration of spectrographs on ground-based astronomical telescopes. new high-resolution spectrographs, covering wavelengths up through the infrared region, requiring new calibration sources that are convenient, inexpensive, and readily available. ... | wavelength references for the calibration of astronomical telescopes |
we perform a systematic search for astronomical observatory sites in the mena (middle-east and north africa) region using space-based data for all the relevant factors, i.e. altitude (dem), cloud fraction (cf), light pollution (ntl), precipitable water vapor (pwv), aerosol optical depth (aod), relative humidity (rh), w... | search for best astronomical observatory sites in the mena region using satellite measurements |
jscanam is the default map-maker for herschel/pacs photometer observations. making use of the redundant information from multiple passages on the sky with different scanning directions, jscanam is able to remove the 1/ f noise that severely affects pacs far-infrared maps, preserving at the same time point sources and r... | the jscanam map-maker method applied to herschel/pacs photometer observations |
the herbig ae star hd 169142 is one of the objects that show complex structure, such as multiple (innermost, middle, and outer) disks, gaps, and unresolved sources. we made n-band (8-13 μm) observations of hd 169142 with the cooled mid-infrared camera and spectrometer on the 8.2 m subaru telescope. the images are spati... | a circumstellar disk around hd 169142 in the mid-infrared (n-band) |
here we present the results of an airborne 3-5.4 μm spectroscopic study of three young, carbon-rich planetary nebulae (pns) ic 5117, png 093.9-00.1, and bd +30 3639. these observations were made using the grism spectroscopy mode of the first light infrared test camera (flitecam) instrument during airborne science opera... | a survey of 3-5.4 μm emission from planetary nebulae using sofia/flitecam |
the near-infrared is populated by numerous emission lines radiated from the earth’s atmosphere, and these emission lines are often several orders of magnitude brighter in intensity than the typical astrophysical science target. the subtraction of these emission lines, sky subtraction, can create large systematic errors... | sky residual correction |
targeting dynamic spatially extended phenomena in the upper solar atmosphere, a new instrument concept has been developed and demonstrated at the dunn solar telescope in new mexico, usa, which provides wide-field, rapid-scanning, high-resolution imaging spectroscopy of the neutral helium λ 10830 spectral triplet. the i... | infrared imaging spectroscopy using massively multiplexed slit-based techniques and sub-field motion correction |
there is significant scientific value to be gained from combining akari fluxes with data at other far-infrared (ir) wavelengths from the infrared astronomical satellite (iras) and herschel missions. to be able to do this we must ensure that there are no systematic differences between the data sets that need to be corre... | akari and iras: from beam corrections to seds |
planets are thought to form in the gas and dust disks around young stars. in particular, it has been proposed that giant planets can form through the gravitational instability of massive extended disks around intermediate-mass stars. however, we still lack direct observations to constrain this mechanism. we have spatia... | very large telescope observations of gomez's hamburger: insights into a young protoplanet candidate |
context. t and y dwarfs are among the coolest and least luminous objects detected, and they can help to understand the properties of giant planets. up to now, there are more than 350 t dwarfs that have been identified thanks to large imaging surveys in the infrared, and their multiplicity properties can shed light on t... | wise j061213.85-303612.5: a new t-dwarf binary candidate |
we have studied the physical and chemical properties of 18 southern red midcourse space experiment sources (rmss), using archival data taken from the atacama pathfinder experiment (apex) telescope large area survey of the galaxy, the australia telescope compact array, and the millimeter astronomy legacy team survey at ... | physical and chemical properties of red msx sources in the southern sky: h ii regions |
context. the benchmark exoplanet gj 1214b is one of the best studied transiting planets in the transition zone between rocky earth-sized planets and gas or ice giants. this class of super-earth or mini-neptune planets is unknown in our solar system, yet is one of the most frequently detected classes of exoplanets. unde... | simultaneous multicolour optical and near-ir transit photometry of gj 1214b with sofia |
thermal infrared observations are the most effective way to measure asteroid diameter and albedo for a large number of near-earth objects (neos). major surveys like neowise, neosurvey, exploreneos, and neolegacy find a small fraction of high albedo objects that do not have clear analogs in the current meteorite populat... | spitzer albedos of near-earth objects |
cyanoacetylene, the simplest cyanopolyyne, is an abundant interstellar molecule commonly observed in a vast variety of astronomical sources. despite its importance as a potential tracer of the evolution of star-forming processes, the deuterated form of cyanoacetylene is less observed and less studied in the laboratory ... | extensive ro-vibrational analysis of deuterated-cyanoacetylene (dc3n) from millimeter-wavelengths to the infrared domain |
we present a study of 18 cm oh maser emission toward 20 high-mass young stellar object outflow candidates (extended green objects, egos) identified from the spitzer galactic legacy infrared mid-plane survey extraordinaire (glimpse). all four oh ground state lines at 1612, 1665, 1667, and 1720 mhz, together with 20-cm c... | probing glimpse extended green objects (egos) with hydroxyl masers |
a substantial amount of important scientific information is contained within astronomical data at the submillimeter and far-infrared (fir) wavelengths, including information regarding dusty galaxies, galaxy clusters, and star-forming regions; however, these wavelengths are among the least-explored fields in astronomy b... | readout for kinetic-inductance-detector-based submillimeter radio astronomy |
we use archival herschel data to examine the singly ionized carbon ([c ii]) content of 14 star-forming dwarf galaxies in the virgo cluster. we use spectral energy distribution fits to far-infrared, mid-infrared, near-infrared, optical, and ultraviolet data to derive the total infrared continuum (tir) for these galaxies... | environmental effects in herschel observations of the ionized carbon content of star-forming dwarf galaxies in the virgo cluster |
integral field spectrographs (ifs) often require non-trivial calibration techniques to process raw data. the oh suppressing infrared imaging spectrograph at the w. m. keck observatory is a lenslet-based ifs that requires precise methods to associate the flux on the detector with both a wavelength and a position on the ... | using non-negative matrix factorization to improve calibration of the keck osiris integral field spectrograph |
the large interferometer for exoplanets (life) is an envisioned nulling interferometry space mission to characterize the atmospheres of terrestrial exoplanets in the mid-infrared (mir) wavelength range (∼4-18.5 μm.) the star-to-planet flux contrast for an earth-twin exoplanet is ≈ 107 at these wavelengths. previous stu... | the nulling interferometer cryogenic experiment: i |
machine learning-based analysis has become essential to efficiently handle the increasing massive data from modern astronomical instruments in recent years. churchwell et al. (2006, 2007) identified infrared ring structures, which are believed to relate to the formation of massive stars, with the human eye. recently, u... | development of a high-speed identification model for infrared-ring structures using deep learning |
quasars can be used to measure baryon acoustic oscillations at high redshift, which are considered as direct tracers of the most distant large-scale structures in the universe. it is fundamental to select quasars from observations before implementing the above research. this work focuses on creating a catalog of quasar... | the quasar candidate catalogs of desi legacy imaging survey data release 9 |
the center for high angular resolution astronomy (chara) array is a six-element interferometer with baselines ranging from 34 to 331 m. three new beam combiners are entering operation: mystic is a 6-telescope combiner for k-band; spica is a 6-telescope combiner for the visible r-band; and silmaril is a 3-telescope comb... | recent technical and scientific highlights from the chara array |
the nancy grace roman space telescope will use its wide-field instrument to carry out a suite of sky surveys in the near-infrared. several of the science objectives of these surveys, such as the measurement of the growth of cosmic structure using weak gravitational lensing, require exquisite control of instrument-relat... | pixel centroid characterization with laser speckle and application to the nancy grace roman space telescope detector arrays |
additive manufacturing (am) has several potential advantages for astronomical instrumentation: particularly the ability to create custom parts with optimised geometries that cannot be produced with traditional manufacturing. the goal of the eu h2020 funded opticon (optical infrared coordination network for astronomy; g... | additively manufactured flexure for astronomy instrumentation |
the design of the near space optical survey-alpha (nsos-α) telescope, encouraged by korea astronomy and space science institute (kasi) aims to discover and catalog near-earth asteroids, especially potentially hazardous asteroids (phas). to achieve this goal, an optical telescope with a 1.5m class primary mirror and a 5... | development of a wide field telescope for the nsos-α |
scientists must reconsider the design of cryogenically cooled spectrometers in order to fully exploit the ever-increasing sensitivity of superconducting far-infrared bolometers. while fourier transform spectrometers (fts) have an illustrious history in astronomical research, the sensitivity of modern detectors is such ... | development of a cryogenic far-infrared post-dispersed polarizing fourier transform spectrometer |
the rising demand for radiation detection materials in many applications has led to extensive research on scintillators1-3. the ability of a scintillator to absorb high-energy (kiloelectronvolt-scale) x-ray photons and convert the absorbed energy into low-energy visible photons is critical for applications in radiation... | all-inorganic perovskite nanocrystal scintillators |
this white paper was prepared by members of the xrism science team for the benefit of the general astronomical community. this paper describes the capabilities of xrism, offers a sampling of the many science topics that the mission will address, and discusses the synergies of xrism with the plethora of planned and exis... | science with the x-ray imaging and spectroscopy mission (xrism) |
context. thanks to the large collecting area (3 ×~1500 cm2 at 1.5 kev) and wide field of view (30' across in full field mode) of the x-ray cameras on board the european space agency x-ray observatory xmm-newton, each individual pointing can result in the detection of up to several hundred x-ray sources, most of which a... | the xmm-newton serendipitous survey. vii. the third xmm-newton serendipitous source catalogue |
we report on konus-wind (kw) and mikhail pavlinsky astronomical roentgen telescope - x-ray concentrator (art-xc) observations and analysis of a nearby grb 221009a, the brightest γ-ray burst (grb) detected by kw for >28 yr of observations. the prompt, pulsed phase of the burst emission lasts for ~600 s and is followe... | properties of the extremely energetic grb 221009a from konus-wind and srg/art-xc observations |
studying the dynamics of past global warming events during the late paleocene to middle eocene informs our understanding of earth's carbon cycle behavior under elevated atmospheric pco2 conditions. due to sparse data coverage, the spatial character of numerous hyperthermal events during this period is still poorly cons... | global extent of early eocene hyperthermal events: a new pacific benthic foraminiferal isotope record from shatsky rise (odp site 1209) |
we present the 2sxps (swift-xrt point source) catalog, containing 206,335 point sources detected by the swift x-ray telescope (xrt) in the 0.3-10 kev energy range. this catalog represents a significant improvement over 1sxps, with double the sky coverage (now 3790 deg2), and several significant developments in source d... | 2sxps: an improved and expanded swift x-ray telescope point-source catalog |
in recent years, observations of the sunyaev-zeldovich (sz) effect have had significant cosmological implications and have begun to serve as a powerful and independent probe of the warm and hot gas that pervades the universe. as a few pioneering studies have already shown, sz observations both complement x-ray observat... | astrophysics with the spatially and spectrally resolved sunyaev-zeldovich effects. a millimetre/submillimetre probe of the warm and hot universe |
the insight-hard x-ray modulation telescope (insight-hxmt) is a broadband x-ray and γ-ray (1-3000 kev) astronomy satellite. one of its three main telescopes is the high energy x-ray telescope (he). the main detector plane of he comprises 18 nai(tl)/csi(na) phoswich detectors, where nai(tl) is used as the primary detect... | the high energy x-ray telescope (he) onboard the insight-hxmt astronomy satellite |
to take advantage of the astrophysical potential of gamma-ray bursts (grbs), chinese and french astrophysicists have engaged the svom mission (space-based multi-band astronomical variable objects monitor). major advances in grb studies resulting from the synergy between space and ground observations, the svom mission i... | the deep and transient universe in the svom era: new challenges and opportunities - scientific prospects of the svom mission |
the medium energy x-ray telescope (me) is one of the three main telescopes on board the insight hard x-ray modulation telescope (insight-hxmt) astronomy satellite. me contains 1728 pixels of si-pin detectors sensitive in 5-30 kev with a total geometrical area of 952 cm2. the application specific integrated circuit (asi... | the medium energy x-ray telescope (me) onboard the insight-hxmt astronomy satellite |
high-resolution uv spectra of stellar h i lyα lines from the hubble space telescope (hst) provide observational constraints on the winds of coronal main-sequence stars, thanks to an astrospheric absorption signature created by the interaction between the stellar winds and the interstellar medium. we report the results ... | new observational constraints on the winds of m dwarf stars |
we present a catalog of likely astrophysical neutrino track-like events from the icecube neutrino observatory. icecube began reporting likely astrophysical neutrinos in 2016, and this system was updated in 2019. the catalog presented here includes events that were reported in real time since 2019, as well as events ide... | icecat-1: the icecube event catalog of alert tracks |
time-division multiplexing (tdm) is a mature scheme for the readout of arrays of transition-edge sensors (tess). tdm is based on superconducting-quantum-interference-device (squid) current amplifiers. multiple spectrometers based on gamma-ray and x-ray microcalorimeters have been operated with tdm readout, each at the ... | developments in time-division multiplexing of x-ray transition-edge sensors |
this review provides an overview of recent advances in multi-wavelength and multi-messenger observations of blazars, the current status of theoretical models for blazar emission, and prospects for future facilities. the discussion of observational results will focus on advances made possible through the fermi gamma-ray... | progress in multi-wavelength and multi-messenger observations of blazars and theoretical challenges |
we present the host-galaxy molecular gas properties of a sample of 213 nearby (0.01 < z < 0.05) hard-x-ray-selected active galactic nucleus (agn) galaxies, drawn from the 70-month catalog of swift's burst alert telescope (bat), with 200 new co(2-1) line measurements obtained with the james clerk maxwell telescope... | bat agn spectroscopic survey. xx. molecular gas in nearby hard-x-ray-selected agn galaxies |
context. in the currently debated context of using clusters of galaxies as cosmological probes, the need for well-defined cluster samples is critical.aims: the xxl survey has been specifically designed to provide a well characterised sample of some 500 x-ray detected clusters suitable for cosmological studies. the main... | the xxl survey. xx. the 365 cluster catalogue |
the einstein telescope (et) is going to bring a revolution for the future of multimessenger astrophysics. in order to detect the counterparts of binary neutron star (bns) mergers at high redshift, the high-energy observations will play a crucial role. here, we explore the perspectives of et, as a single observatory and... | perspectives for multimessenger astronomy with the next generation of gravitational-wave detectors and high-energy satellites |
the recent observation of an x-ray line at an energy of 3.5 kev mainly from galaxy clusters has initiated a discussion about whether we may have seen a possible dark matter signal. if confirmed, this signal could stem from a decaying sterile neutrino of a mass of 7.1 kev. such a particle could make up all the dark matt... | production of sterile neutrino dark matter and the 3.5 kev line |
the imaging x-ray polarimetry explorer (ixpe) observed the black hole x-ray binary 4u 1630-47 in the steep power-law (or very high) state. the observations reveal a linear polarization degree of the 2-8 kev x-rays of 6.8% ± 0.2% at a position angle of 21.°3 ± 0.°9 east of north (all errors at 1σ confidence level). wher... | the first x-ray polarization observation of the black hole x-ray binary 4u 1630-47 in the steep power-law state |
imaging x-ray polarimetry explorer (ixpe) is a small explorer mission that was launched at the end of 2021 to measure the polarization of x-ray emission from tens of astronomical sources. its focal-plane detectors are based on the gas pixel detector, which measures the polarization by imaging photoelectron tracks in a ... | a weighted analysis to improve the x-ray polarization sensitivity of the imaging x-ray polarimetry explorer |
on behalf of the international astronomical consortium for high energy calibration, we present results from the cross-calibration campaigns in 2012 on 3c 273 and in 2013 on pks 2155-304 between the then active x-ray observatories chandra, nustar, suzaku, swift, and xmm-newton. we compare measured fluxes between instrum... | iachec cross-calibration of chandra, nustar, swift, suzaku, xmm-newton with 3c 273 and pks 2155-304 |
x-ray reflection spectroscopy is a powerful tool for probing the strong gravity region of black holes and can be used for testing general relativity in the strong field regime. simplifications of the available relativistic reflection models limit the capability of performing accurate measurements of the properties of b... | testing the kerr black hole hypothesis using x-ray reflection spectroscopy and a thin disk model with finite thickness |
the high energy modular ensemble of satellites (hermes) project is aimed to realize a modular x/gamma-ray monitor for transient events, to be placed on-board of a nano-satellite bus (e.g. cubesat). this expandable platform will achieve a significant impact on gamma ray burst (grb) science and on the detection of gravit... | hermes: an ultra-wide band x and gamma-ray transient monitor on board a nano-satellite constellation |
the x-ray integral field unit (x-ifu) of the advanced telescope for high-energy astrophysics (athena) large-scale mission of esa will provide spatially resolved high-resolution x-ray spectroscopy from 0.2 to 12 kev, with 5^' ' } pixels over a field of view of 5 arc minute equivalent diameter and a spectral resolution o... | the athena x-ray integral field unit (x-ifu) |
context. the erosita x-ray telescope on board the spectrum-roentgen-gamma satellite has started to detect new x-ray sources over the full sky at an unprecedented rate. understanding the performance and selection function of the source detection is important for the subsequent scientific analysis of the erosita catalogs... | establishing the x-ray source detection strategy for erosita with simulations |
einstein's theory of general relativity predicts that the spacetime metric around astrophysical black holes is described by the kerr solution. in this work, we employ state-of-the-art relativistic reflection modeling to analyze a selected set of nustar spectra of galactic black holes to obtain the most robust and preci... | testing general relativity with nustar data of galactic black holes |
we detect a high level of polarization in the x-ray emission of the black hole binary 4u 1630-47 in an observation with the imaging x-ray polarimetry explorer. the 2-8 kev polarization degree is 8% at a position angle of 18°, with the polarization degree increasing significantly with energy, from ~6% at ~2 kev to ~11% ... | detection of x-ray polarized emission and accretion-disk winds with ixpe and nicer in the black hole x-ray binary 4u 1630-47 |
recent detections of gravitational wave signals and neutrinos from gamma-ray sources have ushered in the era of multi-messenger astronomy, while highlighting the importance of gamma-ray observations for this emerging field. amego-x, the all-sky medium energy gamma-ray observatory explorer, is an mev gamma-ray instrumen... | amego-x: mev gamma-ray astronomy in the multi-messenger era |
we report the scaling relations derived by fitting the x-ray parameters determined from analyzing the xmm-newton observations of 120 galaxy clusters in the planck early sunyaev-zel'dovich (sz) sample spanning the redshift range of 0.059 < z < 0.546. we find that the slopes of all the investigated scaling relation... | x-ray scaling relations for a representative sample of planck-selected clusters observed with xmm-newton |
to understand the origin of nuclear (≲100 pc) millimeter-wave (mm-wave) continuum emission in active galactic nuclei (agns), we systematically analyzed subarcsecond resolution band-6 (211-275 ghz) atacama large millimeter/submillimeter array data of 98 nearby agns (z < 0.05) from the 70 month swift/bat catalog. the ... | bass xxxii: studying the nuclear millimeter-wave continuum emission of agns with alma at scales ≲100-200 pc |
the x-ray astronomy recovery mission (xarm) is a recovery mission of astro-h/ hitomi, which is expected to be launched in japanese fiscal year of 2020 at the earliest. the resolve instrument on xarm consists of an array of 6 × 6 silicon-thermistor microcalorimeters cooled down to 50 mk and a high-throughput x-ray mirro... | resolve instrument on x-ray astronomy recovery mission (xarm) |
the hitomi (astro-h) mission is the sixth japanese x-ray astronomy satellite developed by a large international collaboration, including japan, usa, canada, and europe. the mission aimed to provide the highest energy resolution ever achieved at e > 2 kev, using a microcalorimeter instrument, and to cover a wide ener... | hitomi (astro-h) x-ray astronomy satellite |
we present the ixpe observation of grb 221009a, which includes upper limits on the linear polarization degree of both prompt and afterglow emission in the soft x-ray energy band. grb 221009a is an exceptionally bright gamma-ray burst (grb) that reached earth on 2022 october 9 after traveling through the dust of the mil... | the ixpe view of grb 221009a |
we investigate the lyman α emitter (lae) luminosity function (lf) within the redshift range 2.9 ≤ z ≤ 6 from the first instalment of the blind integral field spectroscopic muse-wide survey. this initial part of the survey probes a region of 22.2 arcmin2 in the candels/goods-s field (24 muse pointings with 1h integratio... | the muse-wide survey: a determination of the lyman α emitter luminosity function at 3 < z < 6 |
we analyze simultaneous observations with nustar and swift of the black hole binary gx 339-4 in which we clearly detect both a strong thermal component and prominent relativistic reflection features. we employ nkbb and relxill_nk, which are the state of the art of, respectively, the thermal and reflection models to tes... | testing the kerr black hole hypothesis with gx 339-4 by a combined analysis of its thermal spectrum and reflection features |
the launch of the imaging x-ray polarimetry explorer (ixpe) on 2021 december 9 has opened a new window in x-ray astronomy. we report here the results of the first ixpe observation of a weakly magnetized neutron star, gs 1826-238, performed on 2022 march 29-31 when the source was in a high soft state. an upper limit (99... | polarization properties of the weakly magnetized neutron star x-ray binary gs 1826-238 in the high soft state |
the problem of phase retrieval underlies various imaging methods from astronomy to nanoscale imaging. traditional phase retrieval methods are iterative and are therefore computationally expensive. deep learning (dl) models have been developed to either provide learned priors or completely replace phase retrieval. howev... | autophasenn: unsupervised physics-aware deep learning of 3d nanoscale bragg coherent diffraction imaging |
the miocene climatic optimum (mco; ~16.9 to 14.7 ma) provides an outstanding opportunity to investigate climate-carbon cycle dynamics during a geologically recent interval of global warmth. we present benthic stable oxygen (δ18o) and carbon (δ13c) isotope records (5-12 kyr time resolution) spanning the late early to mi... | eccentricity pacing of eastern equatorial pacific carbonate dissolution cycles during the miocene climatic optimum |
the radial acceleration relation (rar) in galaxies describes a tight empirical scaling law between the total acceleration ${g}_{\mathrm{tot}}(r)={{gm}}_{\mathrm{tot}}(\lt r)/{r}^{2}$ observed in galaxies and that expected from their baryonic mass ${g}_{\mathrm{bar}}(r)={{gm}}_{\mathrm{bar}}(\lt r)/{r}^{2}$, with a char... | the radial acceleration relation in clash galaxy clusters |
antarctic ice sheet and southern ocean paleoceanographic configurations during the late oligocene are not well resolved. they are however important to understand the influence of high-latitude southern hemisphere feedbacks on global climate under co2 scenarios (between 400 and 750 ppm) projected by the ipcc for this ce... | paleoceanography and ice sheet variability offshore wilkes land, antarctica - part 1: insights from late oligocene astronomically paced contourite sedimentation |
the x-ray imaging and spectroscopy mission (xrism) is the successor to the 2016 hitomi mission that ended prematurely. like hitomi, the primary science goals are to examine astrophysical problems with precise highresolution x-ray spectroscopy. xrism promises to discover new horizons in x-ray astronomy. xrism carries a ... | status of x-ray imaging and spectroscopy mission (xrism) |
magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. polarization measurements could provide information on their magnetic fields and surface properties. we observed polarized x-rays from the magnetar 4u 0142+61 using the imaging x-ray polarimetry explorer and found a linear po... | polarized x-rays from a magnetar |
with the largest band gap energy of all commercial semiconductors, gan has found wide application in the making of optoelectronic devices. it has also been used for photodetection such as solar blind imaging as well as ultraviolet and even x-ray detection. unsurprisingly, the appreciable advantages of gan over si, amor... | review of using gallium nitride for ionizing radiation detection |
the tidal forces close to massive black holes can rip apart stars that come too close to them. as the resulting stellar debris spirals toward the black hole, the debris heats up and emits x-rays. we report observations of a stable 131-second x-ray quasi-periodic oscillation from the tidal disruption event asassn-14li. ... | a loud quasi-periodic oscillation after a star is disrupted by a massive black hole |
the lensing signal around galaxy clusters can, in principle, be used to test detailed predictions for their average mass profile from numerical simulations. however, the intrinsic shape of the profiles can be smeared out when a sample that spans a wide range of cluster masses is averaged in physical length units. this ... | lensing constraints on the mass profile shape and the splashback radius of galaxy clusters |
context. the extended roentgen survey with an imaging telescope array (erosita) on board the spectrum-roentgen-gamma (srg) observatory is revolutionizing x-ray astronomy. the mission provides unprecedented samples of active galactic nuclei (agn) and clusters of galaxies, with the potential of studying astrophysical pro... | detecting clusters of galaxies and active galactic nuclei in an erosita all-sky survey digital twin |
galaxy interactions and mergers are thought to play an important role in the evolution of galaxies. studies in the nearby universe show a higher fraction of active galactic nuclei (agns) in interacting and merging galaxies than in their isolated counterparts, indicating that such interactions are important contributors... | investigating the effect of galaxy interactions on the enhancement of active galactic nuclei at 0.5 < z < 3.0 |
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