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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2407.12555 |
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| _version_ | 1866917765124718592 |
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| author | Münz, Filip Řípa, Jakub Pál, András Dafčíková, Marianna Werner, Norbert Ohno, Masanori Meszáros, László Dániel, Vladimír Hanák, Peter Hudec, Ján Frajt, Marcel Kapuš, Jakub Svoboda, Petr Dudáš, Juraj Kasal, Miroslav Vítek, Tomáš Kolář, Martin Szakszonová, Lea Lipovský, Pavol Ďuríšková, Michaela Veřtát, Ivo Sabol, Martin Junas, Milan Maroš, Roman Kosík, Pavel Frei, Zsolt Takahashi, Hiromitsu Fukazawa, Yasushi Galgóczi, Gábor Csák, Balázs László, Robert Mizuno, Tsunefumi Husáriková, Nikola Nakazawa, Kazuhiro |
| author_facet | Münz, Filip Řípa, Jakub Pál, András Dafčíková, Marianna Werner, Norbert Ohno, Masanori Meszáros, László Dániel, Vladimír Hanák, Peter Hudec, Ján Frajt, Marcel Kapuš, Jakub Svoboda, Petr Dudáš, Juraj Kasal, Miroslav Vítek, Tomáš Kolář, Martin Szakszonová, Lea Lipovský, Pavol Ďuríšková, Michaela Veřtát, Ivo Sabol, Martin Junas, Milan Maroš, Roman Kosík, Pavel Frei, Zsolt Takahashi, Hiromitsu Fukazawa, Yasushi Galgóczi, Gábor Csák, Balázs László, Robert Mizuno, Tsunefumi Husáriková, Nikola Nakazawa, Kazuhiro |
| contents | 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 similar orbit carrying as a secondary payload a pair of identical detectors as used on the first mission. These instruments detecting gamma-rays in the range of 30-900 keV consist of a 56 cm2 5 mm thin CsI(Tl) scintillator read-out by a row of multi-pixel photon counters (MPPC or SiPM). The scientific motivation is to detect gamma-ray bursts and other HE transient events and serve as a pathfinder for a larger constellation of nanosatellites that could localize these events via triangulation.
At the beginning of July 2024, GRBAlpha detected 140 such transients, while VZLUSAT-2 had 83 positive detections, confirmed by larger GRB missions. Almost a hundred of them are identified as gamma-ray bursts, including extremely bright GRB 221009A and GRB 230307A, detected by both satellites. We were able to characterize the degradation of SiPMs in polar orbit and optimize the duty cycle of the detector system also by using SatNOGS radio network for downlink. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2407_12555 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations Münz, Filip Řípa, Jakub Pál, András Dafčíková, Marianna Werner, Norbert Ohno, Masanori Meszáros, László Dániel, Vladimír Hanák, Peter Hudec, Ján Frajt, Marcel Kapuš, Jakub Svoboda, Petr Dudáš, Juraj Kasal, Miroslav Vítek, Tomáš Kolář, Martin Szakszonová, Lea Lipovský, Pavol Ďuríšková, Michaela Veřtát, Ivo Sabol, Martin Junas, Milan Maroš, Roman Kosík, Pavel Frei, Zsolt Takahashi, Hiromitsu Fukazawa, Yasushi Galgóczi, Gábor Csák, Balázs László, Robert Mizuno, Tsunefumi Husáriková, Nikola Nakazawa, Kazuhiro High Energy Astrophysical Phenomena 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 similar orbit carrying as a secondary payload a pair of identical detectors as used on the first mission. These instruments detecting gamma-rays in the range of 30-900 keV consist of a 56 cm2 5 mm thin CsI(Tl) scintillator read-out by a row of multi-pixel photon counters (MPPC or SiPM). The scientific motivation is to detect gamma-ray bursts and other HE transient events and serve as a pathfinder for a larger constellation of nanosatellites that could localize these events via triangulation. At the beginning of July 2024, GRBAlpha detected 140 such transients, while VZLUSAT-2 had 83 positive detections, confirmed by larger GRB missions. Almost a hundred of them are identified as gamma-ray bursts, including extremely bright GRB 221009A and GRB 230307A, detected by both satellites. We were able to characterize the degradation of SiPMs in polar orbit and optimize the duty cycle of the detector system also by using SatNOGS radio network for downlink. |
| title | GRBAlpha and VZLUSAT-2: GRB observations with CubeSats after 3 years of operations |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2407.12555 |