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View article: HERMES Pathfinder & SpIRIT: a progress report
HERMES Pathfinder & SpIRIT: a progress report Open
HERMES Pathfinder is an in-orbit demonstration consisting of a constellation of six 3U cubesats hosting simple but innovative X-ray/gamma-ray detectors for the monitoring of cosmic high-energy transients. HERMES-PF, funded by ASI and by th…
View article: High-cadence observations of galactic nuclei by the future two-band UV-photometry mission QUVIK
High-cadence observations of galactic nuclei by the future two-band UV-photometry mission QUVIK Open
The Quick Ultra-VIolet Kilonova surveyor (QUVIK), a two-band UV space telescope approved for funding as a Czech national science and technology mission, will focus on detecting early UV light of kilonovae (Werner et al., 2024). In addition…
View article: Characterization of more than three years of in-orbit radiation damage of SiPMs on GRBAlpha and VZLUSAT-2 CubeSats
Characterization of more than three years of in-orbit radiation damage of SiPMs on GRBAlpha and VZLUSAT-2 CubeSats Open
Silicon photomultipliers (SiPMs) are prone to radiation damage which causes an increase of dark count rate. This leads to an increase in low-energy threshold in a gamma-ray detector combining SiPM and a scintillator. Despite this drawback,…
View article: GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations
GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations Open
GRBAlpha is a 1U CubeSat launched in March 2021 to a sun-synchronous LEO at an altitude of 550 km to perform an in-orbit demonstration of a novel gamma-ray burst detector developed for CubeSats. VZLUSAT-2 followed ten months later in a sim…
View article: GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations
GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations Open
GRBAlpha is a 1U CubeSat launched in March 2021 to a sun-synchronous LEO at\nan altitude of 550 km to perform an in-orbit demonstration of a novel gamma-ray\nburst detector developed for CubeSats. VZLUSAT-2 followed ten months later in a\n…
View article: Science with a Small Two-Band UV-Photometry Mission III: Active Galactic Nuclei and Nuclear Transients
Science with a Small Two-Band UV-Photometry Mission III: Active Galactic Nuclei and Nuclear Transients Open
In this review, the third one in the series focused on a small two-band UV-photometry mission, we assess possibilities for a small UV two-band photometry mission in studying accreting supermassive black holes (SMBHs; mass range $\sim 10^{6…
View article: Science with a Small Two-Band UV-Photometry Mission II: Observations of Stars and Stellar Systems
Science with a Small Two-Band UV-Photometry Mission II: Observations of Stars and Stellar Systems Open
We outline the impact of a small two-band UV-photometry satellite mission on the field of stellar physics, magnetospheres of stars, binaries, stellar clusters, interstellar matter, and exoplanets. On specific examples of different types of…
View article: Science with a Small Two-Band UV-Photometry Mission I: Mission Description and Follow-up Observations of Stellar Transients
Science with a Small Two-Band UV-Photometry Mission I: Mission Description and Follow-up Observations of Stellar Transients Open
This is the first in a collection of three papers introducing the science with an ultra-violet (UV) space telescope on an approximately 130 kg small satellite with a moderately fast re-pointing capability and a real-time alert communicatio…
View article: Science with a small two-band UV-photometry mission III: Active Galactic Nuclei and nuclear transients
Science with a small two-band UV-photometry mission III: Active Galactic Nuclei and nuclear transients Open
In this review (the third in the series focused on a small two-band UV-photometry mission), we assess possibilities for a small UV two-band photometry mission in studying accreting supermassive black holes (SMBHs; mass range $\sim 10^6$-$1…
View article: Science with a small two-band UV-photometry mission II: Observations of stars and stellar systems
Science with a small two-band UV-photometry mission II: Observations of stars and stellar systems Open
We outline the impact of a small two-band UV-photometry satellite mission on the field of stellar physics, magnetospheres of stars, binaries, stellar clusters, interstellar matter, and exoplanets. On specific examples of different types of…
View article: Science with a small two-band UV-photometry mission I: Mission description and follow-up observations of stellar transients
Science with a small two-band UV-photometry mission I: Mission description and follow-up observations of stellar transients Open
This is the first in a collection of three papers introducing the science with an ultra-violet (UV) space telescope on an approximately 130~kg small satellite with a moderately fast re-pointing capability and a real-time alert communicatio…
View article: GRBAlpha: The smallest astrophysical space observatory
GRBAlpha: The smallest astrophysical space observatory Open
Aims. Since it launched on 22 March 2021, the 1U-sized CubeSat GRBAlpha operates and collects scientific data on high-energy transients, making it the smallest astrophysical space observatory to date. GRBAlpha is an in-orbit demonstration …
View article: The peak flux of GRB 221009A measured with GRBAlpha
The peak flux of GRB 221009A measured with GRBAlpha Open
Context. On 2022 October 9 the brightest gamma-ray burst (GRB) ever observed lit up the high-energy sky. It was detected by a multitude of instruments, attracting the close attention of the GRB community, and saturated many detectors. Aims…
View article: GRBAlpha: the smallest astrophysical space observatory -- Part 1: Detector design, system description and satellite operations
GRBAlpha: the smallest astrophysical space observatory -- Part 1: Detector design, system description and satellite operations Open
Aims. Since launched on 2021 March 22, the 1U-sized CubeSat GRBAlpha operates and collects scientific data on high-energy transients, making it the smallest astrophysical space observatory to date. GRBAlpha is an in-obit demonstration of a…
View article: The peak-flux of GRB 221009A measured with GRBAlpha
The peak-flux of GRB 221009A measured with GRBAlpha Open
The brightest gamma-ray burst ever observed, long-duration GRB 221009A, was detected by GRBAlpha nano-satellite without saturation. We present light curves of the prompt emission in 13 energy bands, from 80 keV to 950 keV, and perform a sp…
View article: Early results from GRBAlpha and VZLUSAT-2
Early results from GRBAlpha and VZLUSAT-2 Open
We present the detector performance and early science results from GRBAlpha, a 1U CubeSat mission, which is a technological pathfinder to a future constellation of nanosatellites monitoring gamma-ray bursts (GRBs). GRBAlpha was launched in…
View article: The simulation framework of the timing-based localization for future all-sky gamma-ray observations with a fleet of CubeSats
The simulation framework of the timing-based localization for future all-sky gamma-ray observations with a fleet of CubeSats Open
The timing-based localization, which utilize the triangulation principle with the different arrival time of gamma-ray photons, with a fleet of Cubesats is a unique and powerful solution for the future all-sky gamma-ray observation, which i…
View article: LOW-COST AND HIGH-SPEED ATMOSPHERIC PLASMA PROCESSING OF PEROVSKITE THIN FILMS
LOW-COST AND HIGH-SPEED ATMOSPHERIC PLASMA PROCESSING OF PEROVSKITE THIN FILMS Open
This study addresses the effects of atmospheric-pressure plasma on the properties of methylammonium lead halide perovskite thin films.Plasma-treated films then were used to fabricate an inverted p-i-n perovskite solar cell.The plasma treat…
View article: Magneto-optical investigations of molecular nanomagnet monolayers
Magneto-optical investigations of molecular nanomagnet monolayers Open
Magnetic circular dichroism allows investigation of electronic spectrum and magnetism of a Langmuir–Blodgett monolayer of [Dy(Pc)2].