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short-period, rocky exoplanets that reside in the traditional habitable zone around m dwarf stars are subjected to much higher fuv flux and flaring events than are experienced on earth. the retention and chemistry of any atmosphere will depend, in part, on the presence, magnitude, and longevity of a protective magnetic... | additional heat source for planetary dynamos at the inner core boundary of rocky worlds due to tides |
it has long been observed that earth's atmosphere is uniquely far from its thermochemical equilibrium state in terms of its chemical composition. studying this state of disequilibrium is important for its potential role in the detection of life on other suitable planets \citep{lovelock_1965,kleidon_2010,simoncini_2015}... | disequilibrium in planetary atmospheres and the search for habitability |
we present a new virtual reality experience, which explores the spitzer space telescope. this experience will allow users to observe the sky as spitzer sees it, visualize the physical scale of the instrument, and engage interactively with spitzer in its natural habitat. in this talk, we will discuss our process in deve... | spitzer final voyage vr: a new interactive experience to explore spitzer's observational achievements |
the ultracool dwarf (ucd) trappist-1 is close to earth (~12 pc) and possesses several earth-sized terrestrial planets, making it a compelling target for exoplanet characterization. trappist-1 is an active m8v star with frequent flaring, as is typical of ucds. ucds have been observed to undergo particularly extreme outb... | evryscope constraints on trappist-1 superflare occurrence and planetary habitability |
characterizing rocky exoplanet atmospheres is a key goal of upcoming facilities such as the james webb space telescope (jwst), but interpreting such observations will require understanding the stellar uv irradiation incident on the planet from its host star. stellar uv mediates atmospheric escape, photochemistry, and p... | spectral characterization of m-dwarf stars with astrosat uvit: application to rocky exoplanets |
the nearby ultracool dwarf trappist-1 possesses several earth-sized terrestrial planets, three of which have equilibrium temperatures that may support liquid surface water, making it a compelling target for exoplanet characterization. trappist-1 is an active star with frequent flaring, with implications for the habitab... | evryscope and k2 constraints on trappist-1 superflare occurrence and planetary habitability |
exoplanet detection with precise radial velocity (rv) observations is currently limited by spurious rv signals introduced by the host star in the form of stellar activity (i.e. faculae, starspots). here we show that a cross-disciplinary approach blending solar physics, exoplanet astronomy, and computer science can help... | removing stellar activity signals from radial velocity measurements using neural networks |
in the future, comparative exoplanet science will illuminate how the evolution of planet, star and planetary system produce a diversity of worlds, including those that may be habitable or even harbor life. the recent astro2020 decadal survey identified worlds and suns in context as a major scientific opportunity that i... | exoplanet astrobiology: the search for habitable planets and life beyond the solar system |
large flares from active stars have dramatic impacts on orbiting exoplanets. planets in the active stars' habitable zones will be impacted by flares and superflares (energies ≥1033 erg), and associated high-energy particle emissions, which could strip the planet of its atmosphere and impart massive amounts of ultraviol... | argusspec: an autonomous, fast-slew spectrograph designed for rapid flare followup |
we will discuss the impact of exoplanetary space weather on the climate and habitability, which offers fresh insights concerning the habitability of exoplanets, especially those orbiting m-dwarfs, such as proxima b and the trappist-1 system. | are "habitable" exoplanets really habitable? a perspective from atmospheric loss |
results from kepler and ground-based exoplanet surveys suggest that m-dwarfs host numerous small sized planets. additionally, the discovery of the earth-sized exoplanets orbiting proxima centauri and trappist 1 demonstrate that these stars can host terrestrial planets in their habitable zones. since low-mass stars are ... | minerva-red: a telescope dedicated to the discovery of planets orbiting the nearest low-mass stars |
the famous fermi paradox questioning the existence of extraterrestrial intelligence can be put to rest. astrophysicists and astronomers have spent decades decoding the mysteries of the universe based on the physical laws formulated by intellectual human beings based mostly on observations and investigations carried out... | if they are there, where are they? |
planet formation directly determines various properties of planets that impact their habitability. i propose to review the orbital dynamics of exoplanetary systems, emphasizing the implications for characteristics likely to impact habitability. | orbital dynamics of planetary systems with super-earths and mini-neptunes |
cosmic rays irradiance on exoplanets play an important role in habitability. specially, atmospheric shielding is a key parameter as it determines the flux of radiation on planetary surfaces. in this project, we estimate the flux of cosmic rays for diverse selected exoplanets in their habitable zones to evaluate their p... | cosmic rays as a clue constraint in exoplanet habitability |
earth is a unique planet, and unlike many exoplanets, it is suited to support life as we know it. transforming an uninhabitable planet into a habitable one presents many challenges. though there may be challenges, there are larger problems on earth that need addressing. one of these problems is the looming threat of ov... | assessing the habitability of ut-0f30 for the process of terraforming |
sub-neptune type exoplanets are abundant in our galaxy yet have no solar system analogs. investigating their atmospheres will be an important stepping stone to understanding smaller, terrestrial planets with potential for habitability. accurate modeling of exoplanet atmospheres can help inform and constrain observation... | exploring the interaction of rotation rate and stellar irradiation on synchronously rotating sub-neptunes |
the precise radial velocity (prv) method for detecting exoplanets aims to detect the stellar reflex motion from terrestrial habitable zone planets, which produce doppler signals with velocity semi-amplitudes on the order of 10 cm/s for a g star and closer to 25 cm/s for an m dwarf. there are various instrumentation and... | characterizing and mitigating telluric absorption in precise radial velocities: dependence on spectral type |
meteorites provide constraints for key stages in planetary evolution, namely metal-silicate differentiation, silicate melting, and impact bombardment. insights from meteorites can be applied to exoplanets, such as modeling the formation of distant worlds, and investigating the habitability of earth-like exoplanets. | meteoritical constraints on our solar system and beyond |
more than 3500 exoplanets have been confirmed nowadays, including a very large number of planets discovered by the kepler mission. additional exoplanets are expected to be found by ongoing missions as, e.g., k2 as well as future missions such as tess. exoplanets, especially terrestrial planets, located in stellar habit... | a new method for the quick determination of s-type and p-type habitable zones in binary systems |
most of the significant changes in planetary evolution occur within the first billion years. observing young planetary systems allows us to understand the physical mechanisms driving these changes in ways that observations of mature planets cannot. transit surveys have begun to discover young planets, but mostly have b... | toi-712: an adolescent, multi-planet system hosting three transiting mini-neptunes |
the traditional definition of the habitable zone (hz) is the range of distances from a star that includes an earth-like planet where the climate is stable enough for water to be, and is therefore, habitable. we investigate the additional effects of orbit perturbations from neighboring planets and their implications for... | orbit perturbations of habitable zone planets and implications for habitability |
a main determinant of the habitability of exoplanets is the presence of stable liquid surface water. in an era of abundant possible targets, the potential to find a habitable world remains a driving force in prioritization. we present here a data-forward method to investigate the likelihood of a stable hydrosphere on t... | on the hydrosphere stability of tess targets: applications to 700 d, 256 b, and 203 b |
a major endeavour in recent exoplanetary science is to detect potentially habitable, earth-like planets around nearby stars. the upcoming spirou (le spectropolarimètre infra-rouge) legacy survey is one such initiative and is optimized for the detection of such exoplanets around cool m-dwarfs via the radial velocity met... | the rossiter-mclaughlin effect of planets transiting m-dwarfs, and its impact on planet detection in doppler surveys |
paradome is a hypothetical icy exoplanet. paradomes atmosphere is thick with oxygen, nitrogen, and hydrogen. currently there is no trace of carbon dioxide or any other greenhouse gases. the climate is dry and we have access to sunlight, but the lack of greenhouse gases disables its ability to warm the planets surface. ... | paradome: using antartica to research terraforming an exoplanet |
as exoplanet transmission spectra become possible for smaller planets, it becomes pertinent to question what we expect to observe from an exo-earth. previously, atmospheric and aqueous chemistry models have been used independently to investigate atmospheric and surface processes taking place on terrestrial exoplanets. ... | synthetic spectra of potential exo-earths: quantifying biotic signatures with aroc |
planetary atmospheres are significantly governed by the host star's ultraviolet (uv) emission through photochemistry and photoevaporation and are best probed by uv spectroscopy where higher atomic and molecular opacities yield bigger signals. uv-scope (ultraviolet spectroscopic characterization of planets and their env... | exoplanet science drivers for the uv-scope midex mission concept |
the gamma-ray cherenkov telescope (gct) is a small-sized telescope (sst) that represents one of three novel designs that are based on schwarzschild-couder optics and are proposed for use within the cherenkov telescope array (cta). the gamma-ray telescope elements (gate) program has led an effort to build a prototype of... | simulating the optical performance of a small-sized telescope with secondary optics for the cherenkov telescope array |
there is no consensus on the emission mechanism of γ-ray bursts (grbs). a synchrotron model can produce γ-ray spectra with the empirical band function form (band et al., 1993), from a piece-wise two-power-law electron energy distribution (2epls). this synchrotron model predicts that for the same γ-ray spectrum, optical... | the emission mechanism of gamma-ray bursts: identification via optical-ir slope measurements |
the cherenkov telescope array (cta) is the next generation ground based observatory for gamma ray astronomy at very high energies. employing more than 100 imaging atmospheric cherenkov telescopes in the northern and southern hemispheres, it was designed to reach unprecedented sensitivity and energy resolution. understa... | raman lidars for the atmospheric calibration along the line-of-sight of cta |
the cherenkov telescope array (cta) represents the next generation of ground based observatories for very high energy gamma ray astronomy. the cta will consist of two arrays at two different sites, one in the northern and one in the southern hemisphere. the current cta design foresees, in the southern site, the install... | pre-selecting muon events in the camera server of the astri telescopes for the cherenkov telescope array |
the italian national institute for astrophysics (inaf) is leading the astri project within the ambitious cherenkov telescope array (cta), the next generation of ground-based observatories for very high energy gamma-ray astronomy. in the framework of the small sized telescopes (sst), a first goal of the astri project is... | software design of the astri camera server proposed for the cherenkov telescope array |
we present a description and instrumental characterization of the photometric equipment of the astronomical observatory of the university of jaén. the observatory hosts a 41 cm automated telescope inside a 4 m dome located at the university main campus, in the outskirts of the city of jaén (spain). this facility is use... | the university of jaén astronomical observatory |
the cherenkov telescope array (cta) will be the first ground-based observatory for gamma-ray astronomy. with more than a hundred of 4th generation of imaging atmospheric cherenkov telescopes (iacts) distributed in two large arrays, cta will reach unprecedented sensitivity, angular resolution, and spectral coverage. thr... | status and performance results from nectarcam - a camera for cta medium sized telescopes |
the astri mini-array is an international collaboration led by the italian national institute for astrophysics (inaf) and devoted to the imaging of atmospheric cherenkov light for very-high gamma-ray astronomy. the project is deploying an array of 9 telescopes sensitive above 1 tev. in this contribution, we present the ... | the software architecture and development approach for the astri mini-array gamma-ray air-cherenkov experiment at the observatorio del teide |
more than 20 yr after the end of nasa's compton gamma-ray observatory mission, the data collected by its imaging compton telescope (comptel) still provide the most comprehensive and deepest view of our universe in mev gamma rays. while most of the comptel data are archived at nasa's high energy astrophysics science arc... | comptel data analysis using gammalib and ctools |
the cherenkov telescope array (cta) is the next generation ground-based observatory for gamma-ray astronomy at very-high energies. it will be capable of detecting gamma rays in the energy range from 20 gev to more than 300 tev with unprecedented precision in energy and directional reconstruction. with more than 100 tel... | the cherenkov telescope array |
the cherenkov telescope array (cta) is the next-generation atmospheric cherenkov gamma-ray observatory. cta will consist of two installations, one in the northern, and the other in the southern hemisphere, containing tens of telescopes of different sizes. the cta performance requirements and the inherent complexity ass... | status and plans for the array control and data acquisition system of the cherenkov telescope array |
the operation of the future cherenkov telescope array (cta), the next generation of imaging atmospheric cherenkov telescopes (iacts), as an open observatory requires data products and analysis tools to be accessible and usable by the scientific community. this requirement has impelled gamma-ray astronomers to develop o... | standardisation of data formats in gamma-ray astronomy |
integral (international gamma-ray astrophysics laboratory) is an astronomical observatory of the european space agency, responsible for many significant scientific discoveries in the last few decades. it orbits earth since 2002 in a highly elliptical orbit, passing through the van allen belts - areas with high-energy i... | machine learning for effective spacecraft operation: operating integral through dynamic radiation environments |
in the last ten years silicon photomultipliers (sipms) have gained terrain in experiments and applications in which photomultiplier tubes have been the dominant photosensors during decades. imaging atmospheric cherenkov telescopes (iacts) for very high energy (vhe, e>50 gev) gamma-ray astronomy are experiencing the ... | silicon photomultipliers in very high energy gamma-ray astrophysics |
the five hundred-meter aperture spherical radio telescope (fast), operated by the national astronomical observatories, chinese academy of sciences, has discovered a radio millisecond pulsar (msp) coincident with the unassociated gamma-ray source 3fgl j0318.1+0252 (acero et al. 2015 apjs, 218, 23), also known as fl8y j0... | fast's discovery of a new millisecond pulsar (msp) toward the fermi-lat unassociated source 3fgl j0318.1+0252 |
the cherenkov telescope array (cta) project, led by an international collaboration of institutes, aims to create the world's largest next generation very high-energy (vhe) gamma-ray telescope array, devoted to observations in a wide band of energy, from a few tens of gev to more than 100 tev. the small-sized telescopes... | aspherical mirrors for the gamma-ray cherenkov telescope, a schwarschild-couder prototype proposed for the future cherenkov telescope array |
very high energy gamma-ray astronomy with the cherenkov telescope array (cta) is evolving towards the model of a public observatory. handling, processing and archiving the large amount of data generated by the cta instruments and delivering scientific products are some of the challenges in designing the cta data manage... | cherenkov telescope array data management |
the cherenkov telescope array (cta) observatory, with dozens of telescopes located in both the northern and southern hemispheres, will be the largest ground-based gamma-ray observatory and will provide broad energy coverage from 20 gev to 300 tev. the large effective area and field-of-view, coupled with the fast slewin... | the science alert generation system of the cherenkov telescope array observatory. |
current generation imaging atmospheric cherenkov telescopes (iacts) like hess, magic and veritas, operated in array-mode, have opened a new astronomical window in high energy gamma-ray band from a few tens gev to a hundred tev, allowing to observe the most energetic phenomena on going in our universe. new generation ar... | aluminum-based segmented mirrors for gamma-ray cherenkov telescopes via replication: status and perspectives |
cta (cherenkov telescope array) is the next generation ground-based observatory for gamma-ray astronomy at very-high energies. once completed, cta will outperform present-day facilities by an order of magnitude in sensitivity, and significantly enlarge the accessible energy range and survey capabilities. deployed in th... | lst-1, the large-sized telescope prototype of cta. status and first observations |
we describe the 10-day radio observations of the gamma-ray pulsar j1836+5925. observations were carried out in 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 |
the cherenkov telescope array (cta) is a project to build a new generation ground-based gammaray observatory. the fram - f(/ph)otometric robotic atmospheric monitor - is a device, which can provide it with the vertical aerosol optical depth (vaod) maps in the field of view of the cta in almost real time (delay in minut... | fram for the cherenkov telescope array: an update |
the cherenkov telescope array (cta) will be the next generation ground-based observatory for gamma-ray astronomy, covering an energy range from a few tens of gev to a few hundred tev. the cta project is currently in the design and prototyping phase, the start of construction is planned for 2016. the planned sensitivity... | results and developments from the 12m davies-cotton medium-sized telescope prototype for the cherenkov telescope array |
the next generation of cherenkov telescope cameras feature silicon photo multipliers (sipm), which can guarantee excellent performance and allow for observation also under moonlight, increasing duty-cycle and therefore the physics reach. a 4 m-diameter davies-cotton prototype telescope with a 9-degree optical fov and a... | calibration and operation of sipm-based cameras for gamma-ray astronomy in presence of high night-sky light |
the cherenkov telescope array (cta) is a worldwide project aimed at building the next-generation groundbased gamma-ray observatory. cta will be composed of two arrays of telescopes of different sizes, one each in the northern and southern hemispheres, to achieve full-sky coverage and a ten-fold improvement in sensitivi... | astri data reduction software in the framework of the cherenkov telescope array |
the construction of a prototype schwarzschild-couder telescope (psct) started in early june 2015 at the fred lawrence whipple observatory in southern arizona, as a candidate medium-sized telescope for the cherenkov telescope array (cta). compared to current davies-cotton telescopes, this novel instrument with an aplana... | toward the construction of a medium size prototype schwarzschild-couder telescope for cta |
in 2014 the astri collaboration, led by the italian national institute for astrophysics, has constructed an end-to-end prototype of a dual-mirror imaging air cherenkov telescope, proposed for the small size class of telescopes for the cherenkov telescope array. the prototype, named astri sst-2m, has been installed at t... | the astri sst-2m prototype for the cherenkov telescope array: primary mirror characterization by deflectometry |
the schwarzschild-couder telescope (sct) is a candidate technology for a medium-sized telescope within the cherenkov telescope array, the next generation ground based observatory for very high energy gamma ray astronomy. the sct uses a novel two-mirror design and is expected to yield improvements in field of view and i... | camera design and performance of the prototype schwarzschild-couder telescope for the cherenkov telescope array |
the cherenkov telescope array (cta) is the next generation very high energy gamma-ray observatory covering the 20 gev - 300 tev energy range with unprecedented sensitivity, angular and energy resolution. with a site in each hemisphere, cta will provide full-sky coverage. four large size telescopes (lsts) in each site w... | monte carlo studies of combined magic and lst1 observations |
data from long-term multi-frequency monitoring are used to analyze variations in the flux density of the active galactic nucleus s4 0954+658. these data were obtained at the crimeanastrophysical observatory, the metsähovi radio observatory of aalto university, the university of michigan radio astronomy observatory, the... | non-stationary emission of the blazar s4 0954+658 over a wide range of wavelength |
on december 16, 2020, the magic telescopes observed grb 201216c following the trigger by swift-bat and fermi-gbm (beardmore et al., gcn 29061, fermi/gbm team gcn 29063). magic started observations under good conditions about 57 seconds after the grb onset. the preliminary offline analyses show an excess above 5 sigma, ... | grb 201216c: magic detection in very high energy gamma rays |
the cherenkov telescope array (cta), the next generation very high energy gamma-rays observatory, will consist of three types of telescopes: large (lst), medium (mst) and small (sst) size telescopes. the ssts are dedicated to the observation of gamma-rays with energy between a few tev and a few hundreds of tev. the sst... | characterization and commissioning of the sst-1m camera for the cherenkov telescope array |
sub-milliarcsecond imaging of nearby main sequence stars and binary systems can provide critical information on stellar phenomena such as rotational deformation, accretion effects, and the universality of starspot (sunspot) cycles. achieving this level of resolution in optical wavelength bands (u/v) requires use of a s... | stellar intensity interferometric capabilities of iact arrays |
the cherenkov telescope array (cta) will be the next-generation ground-based observatory using the atmospheric cherenkov technique. the cta instrument will allow researchers to explore the gamma-ray sky in the energy range from 20 gev to 300 tev. cta will comprise two arrays of telescopes, one with about 100 telescopes... | status of the array control and data acquisition system for the cherenkov telescope array |
sn2014j is the closest supernova of type ia that occurred in the last 40 years. this provides an opportunity for unprecedented observational detail and coverage in many astronomical bands, which will help to better understand the still unknown astrophysics of these supernovae. for the first time, such an event occurs s... | gamma rays from a supernova of type ia: sn2014j |
today the scientific community is facing an increasing complexity of the scientific projects, from both a technological and a management point of view. the reason for this is in the advance of science itself, where new experiments with unprecedented levels of accuracy, precision and coverage (time and spatial) are real... | the cherenkov telescope array observatory: top level use cases |
we observed the blazar s5 0716+714 (ra: 07:21:53.45, dec: +71:20:36.36, j2000.0) with the 0.3 m telescope at the astronomical observatory of the university of siena, triggered by atel #11100 issued by the magic collaboration reporting unprecedented activity in vhe (e > 100 gev) gamma rays from the source. | optical brightening of the blazar s5 0716+714 |
the assumption of lorentz invariance is one of the founding principles of modern physics and violation of it would have profound implications to our understanding of the universe. for instance, certain theories attempting a unified theory of quantum gravity predict there could be an effective refractive index of the va... | lorentz invariance violation with gamma rays |
the high altitude water cherenkov (hawc) observatory is an air-shower array located in mexico. it is sensitive to the highest energy photons we detect at the earth, reaching energies of several tens of tev. the observatory was completed more than one year ago and we are presenting in this contribution the first results... | very high energy gamma-ray astronomy with hawc |
bootes-5 is the fifth robotic observatory of the international network of robotic telescopes bootes (burst observer and optical transient exploring optical system). it is located at the national astronomical observatory at sierra san pedro martir, baja california, mexico. it was dedicated on november 26, 2015 and it is... | the bootes-5 telescope at san pedro martir national astronomical observatory, mexico |
following the strong flare of blazar b2 1420+32 starting from 2019 december 31 in high-energy gamma-rays (atel #13382, #13412, #13417), we have conducted our radio observations with the 32-m radio telescope of the iaa ras badary radio astronomical observatory (http://iaaras.ru/en/dept/badary/). | badary rt32 radio follow-up b2 1420+32 |
master-oafa robotic telescope (global master-net: http://observ.pereplet.ru, lipunov et al., 2010, advances in astronomy, vol. 2010, 30l) located in argentina (oafa observatory of san juan national university) was pointed to the possible long grb181208.19 (trigger num 565936249) 17 sec after notice time and 123 sec aft... | three ots detected by master-oafa during fermi trigger inspection |
the cherenkov telescope array (cta) observatory will represent the new frontier of imaging atmospheric cherenkov telescope. the simultaneous use of large, medium and small telescopes (respectively lst, mst and sst) will allow to explore the astronomy related to the very high energy domain, typical of gamma rays, with a... | astri sst-2m: the design evolution from the prototype to the array telescope |
flashcam is an innovative camera designed for the focal plane instrumentation of cherenkov telescopes. the concept of the flashcam trigger and readout system is based on the continuous digitization and digital processing of the photo detector signals on fpgas, and on a high performance, ethernet-based front-end readout... | flashcam: a fully digital camera for the cherenkov telescope array medium-sized telescopes |
the gamma-400 (gamma astronomical multifunctional modular apparatus) will be a new generation satellite gamma-observatory. the gamma-ray telescope gamma-400 consists of the anticoincidence system (top and lateral sections—actop and aclat), the converter-tracker (c), the time-of-flight system tof (two sections s1 and s2... | gammas and charged particles identification in lateral and additional apertures of gamma-400 |
the cherenkov telescope array (cta) is the next generation instrument for very high energy (vhe) gamma-ray astronomy. being successor to the vastly successful instruments h.e.s.s. in namibia, magic on the canary island of la palma, and veritas in arizona, usa, it is expected to outperform the former by a factor of 10, ... | current status of the namibian bid to host the cherenkov telescope array |
the landscape of ground-based gamma-ray astronomy is changing drastically with the perspective of the cherenkov telescope array (cta) composed of more than 100 cherenkov telescopes. for the first time in this energy domain, cta will be operated as an observatory open to the astronomy community. in this context, a struc... | structuring metadata for the cherenkov telescope array |
one of the primary observational objectives of the 0.5 m robotic telescope of ondřejov observatory is the ground‑based follow‑up of gamma‑ray burst triggers. this independent robotic observatory has been in operation since 2008 and has followed up more than a hundred events localized by the swift or integral satellites... | applying weighted image coaddition to observations of grb optical afterglows at the d50 telescope in ondřejov |
the cherenkov telescope array (cta) is the next generation of ground-based very high energy gamma-ray instruments and is planned to be built on two sites (one in each hemisphere) in the coming years, with full array operation foreseen to begin 2020. the goal of performing high precision gamma-ray energy measurements wh... | real-time atmospheric monitoring for the cherenkov telescope array using a wide-field optical telescope |
we carried out a multi-frequency cross-correlation analysis of the blazar pks 1424-418 with data collected by fermi large area telescope (fermi-lat) and the hartebeesthoek radio astronomy observatory (hartrao) 26m radio telescope between 17 october 2012 and 9 september 2013 during its flaring state. using the discrete ... | examining the radio to gamma-ray correlation of the blazar pks 1424-418 during its flaring state |
the cherenkov telescope array (cta) is an observatory for ground-based gamma-ray astronomy currently under construction, which will observe photons with very high energies (20 gev - 300 tev). one of the main contributions to the systematic uncertainties stems from the uncertainty on the atmospheric density profile, of ... | overview of atmospheric simulation efforts in cta |
the cherenkov telescope array (cta) represents the next generation of ground-based observatories for very high energy gamma-ray astronomy. the cta will consist of two arrays at two different sites, one in the northern and one in the southern hemisphere. the current cta design foresees, in the southern site, the install... | information and communications technology (ict) infrastructure for the astri sst-2m telescope prototype for the cherenkov telescope array |
the dark energy survey is undertaking an observational programme imaging 1/4 of the southern hemisphere sky with unprecedented photometric accuracy. in the process of observing millions of faint stars and galaxies to constrain the parameters of the dark energy equation of state, the dark energy survey will obtain pre-d... | desalert: enabling real-time transient follow-up with dark energy survey data |
the cherenkov telescope array (cta) project aims to create the next generation very high-energy (vhe) gamma-ray telescope array. it will be devoted to the observation of gamma rays from 20 gev to above 100 tev. because of this wide energy band, three classes of telescopes, associated with different energy ranges and di... | performance of the gamma-ray cherenkov telescope structure: a dual-mirror telescope prototype proposed for the future cherenkov telescope array |
the cherenkov telescope array (cta) will be the next generation ground based observatory in very high energy gamma ray astronomy. the facility will achieve a wide energy coverage, starting from a threshold of a few tens of gev up to hundreds of tev by utilising several classes of telescopes, each optimised for differen... | the camera calibration strategy of the cherenkov telescope array |
the high energy stereoscopic system (h.e.s.s.) experiment is one of the largest observatories for gamma-ray astronomy. it consists of four telescopes with a reflecting dish diameter of 12m (ct1 to ct4) and a newer large telescope (ct5) with a reflecting dish diameter of 28m. on ct5 876 mirror facets are mounted, all of... | the mirror alignment and control system for ct5 of the h.e.s.s. experiment |
the nectarcam is a camera proposed for the medium-sized telescopes in the framework of the cherenkov telescope array (cta), the next-generation observatory for very-high-energy gamma-ray astronomy. the cameras are designed to operate in an open environment and their mechanics must provide protection for all their compo... | cooling tests of the nectarcam camera for the cherenkov telescope array |
the cherenkov telescope array (cta), a ground-based facility for very-high-energy (vhe) gamma-ray astronomy, will operate as an open observatory, serving a wide scientific community to explore and to study the non-thermal universe. open community access is a novelty in this domain, putting a challenge on the implementa... | observer access to the cherenkov telescope array gamma-ray observatory |
the cherenkov telescope array (cta) is the next generation ground-based observatory for gamma-ray astronomy at very high energies. with more than 100 telescopes at two sites, cta will be the world's largest and most sensitive high-energy gamma-ray observatory covering the full sky with a northern array located at the r... | cherenkov telescope array (cta): building the world's largest ground-based gamma-ray observatory |
steve criswell died on sunday january 3, 2021 in tucson, arizona. he was 79. steve was a smithsonian astrophysical observatory (sao) employee for 53 years (1962-2016), during which he served many roles including facility manager at fred lawrence whipple observatory (flwo) and project manager for the very energetic radi... | steve criswell (1941-2021) |
optical synchrotron emission from blazars is significantly polarized and the polarization probes the magnetic field structure in the jet. rotations of the polarization angle in blazars reveal important information about the evolution of disturbances responsible for blazar flares. the robopol program for the polarimetri... | the robopol optopolarimetric blazar monitorng program |
construction and operation of ground astrophysical facilities can be affected by adverse weather conditions. some weather risks are obvious, but still there are times when an unforeseen event distorts the perception of how relevant a climate-related risk is. on the other hand, adverse weather conditions can delay or en... | risk assessment of environmental conditions affecting the useful lifetime of cherenkov telescopes at el roque de los muchachos observatory |
the cherenkov telescope array (cta) is the next-generation observatory for ground-based gamma-ray astronomy. cta's baseline layout comprises two arrays of gamma-ray telescopes in both hemispheres, with 19 telescopes on the island of la palma (spain) and 99 telescopes in paranal (chile). due to its large number of teles... | hipecta - a high performance library for the cherenkov telescope array data reconstruction |
we are pleased to introduce the new general coordinates network, the evolution of the gamma-ray coordinates network (now referred to as gcn classic) using modern, open-source, reliable, and secure alert distribution technologies that have been established by the broader astronomy community and promoted by the vera c. r... | introducing new gcn kafka broker and web site for transient alerts, https://gcn.nasa.gov |
we have re-examined the comprehensive cgro observations of two key long duration gamma ray flares, those being 1991 june 9 and 11. these events are unique because they cover a wide range of gamma-ray energies from 50 kev to above 1 gev. most importantly, neutrons were spectroscopically analyzed from these events. the m... | comprehensive dual-species observations of the long duration gamma ray flares of 1991 june 9 and 11. |
astronomical observatories can be operated either manually or remotely, but both of these options currently have many disadvantages. manual observatories require real-time staffing by on-site astronomers and technicians, and observation time is often not used optimally. remote observatories, on the other hand, often ma... | robotising existing astronomical observatories |
the cherenkov telescope array (cta) is the next generation ground-based gamma-ray astronomy observatory, planned to comprise two arrays of imaging air cherenkov telescopes (iacts) located in the northern and southern hemispheres. three telescope sizes are required to cover the cta gamma-ray energy range from 20 gev to ... | the silicon photomultiplier-based camera for the cherenkov telescope array small-sized telescopes |
we observed on july the 30th the flat spectrum radio quasar txs 0025+197 (ra: 00 27 29.8 dec: +20 00 27 j2000.0) at redshift z=1.55 (alam et al., 2015, apjs, 219, 12) from the astronomical observatory of the university of siena. | the gamma-ray flaring blazar txs 0025+197 observed below r=16 in optical |
legacy version of the divtel library. | cta-observatory/divtel: v0.1 |
blazars are powered by relativistic jets and radiate exclusively through extreme, nonthermal particle interactions, energized by accretion onto supermassive black holes. despite intensive observational and theoretical efforts over the last four decades, the details of blazar astrophysics remain elusive. the launch of n... | robopol: unveiling the physics of blazar jets from skinakas |
the combined use of large ground based facilities and large space observatories is playing a key role in the advance of astrophysics by providing access to the entire electromagnetic spectrum, allowing high sensitivity observations from the lower radio wavelength to the higher energy gamma rays.it is nowadays clear tha... | which future for electromagnetic astronomy: ground based vs space borne large astrophysical facilities |
the pi of the sky is a system of five autonomous detectors designed for continuous observation of the night sky, mainly looking for optical flashes of astrophysical origin, in particular for gamma ray bursts (grb). in the pi of the sky project we also study many kinds of variable stars (periods in range of 0.5d - 1000.... | comparison of the period detection algorithms based on pi of the sky data |
at2020xss master global robotic net http://observ.pereplet.ru is equipped by identical twin wide field telescope master-ii (2*4sq.degrees) and twin very wide field (~2*400sq.deg.) cameras master-vwfc at every master observatory (lipunov et al. 2010) master-tavrida wide field robotic-telescope (lipunov et al. gcn #28704... | master ot j050152.74+770406.3: bright optical counterpart of grb 201020b |
in this work we present a general algorithm to calculate the zero coma point for classical and non-classical reflecting telescopes with aspherical surfaces. we programmed a general ray tracing function applicable to conical surfaces with asphericity, displacements, and inclinations that can be modified by the users, ac... | off-axis exact ray tracing algorithm for zero coma point determination in classical and non-classical reflective telescopes |
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