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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.15916 |
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| _version_ | 1866913950677860352 |
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| author | Metzler, Zachary Kirschner, Nicholas Smith, Lucas Cannady, Nicholas Sasaki, Makoto Shy, Daniel Caputo, Regina Kierans, Carolyn Bolotnikov, Aleksey Caligiure, Thomas J. Carini, Gabriella A. Crosier, A. Wilder Fried, Jack Ghosh, Priyarshini Griffin, Sean Grove, J. Eric Hays, Elizabeth Herrmann, Sven Kong, Emily Liceaga-Indart, Iker McEnery, Julie Mitchell, John Moiseev, A. A. Parker, Lucas Perkins, Jeremy Phlips, Bernard Schoenwald, Adam J. Sleator, Clio Thompson, D. J. Valverde, Janeth Wasti, Sambid Woolf, Richard Wulf, Eric Zajczyk, Anna |
| author_facet | Metzler, Zachary Kirschner, Nicholas Smith, Lucas Cannady, Nicholas Sasaki, Makoto Shy, Daniel Caputo, Regina Kierans, Carolyn Bolotnikov, Aleksey Caligiure, Thomas J. Carini, Gabriella A. Crosier, A. Wilder Fried, Jack Ghosh, Priyarshini Griffin, Sean Grove, J. Eric Hays, Elizabeth Herrmann, Sven Kong, Emily Liceaga-Indart, Iker McEnery, Julie Mitchell, John Moiseev, A. A. Parker, Lucas Perkins, Jeremy Phlips, Bernard Schoenwald, Adam J. Sleator, Clio Thompson, D. J. Valverde, Janeth Wasti, Sambid Woolf, Richard Wulf, Eric Zajczyk, Anna |
| contents | ComPair, a prototype of the All-sky Medium Energy Gamma-ray Observatory (AMEGO), completed a short-duration high-altitude balloon campaign on August 27, 2023 from Fort Sumner, New Mexico, USA. The goal of the balloon flight was the demonstration of ComPair as both a Compton and Pair telescope in flight, rejection of the charged particle background, and measurement of the background $γ$-ray spectrum. This analysis compares measurements from the balloon flight with Monte Carlo simulations to benchmark the instrument. The comparison finds good agreement between the measurements and simulations and supports the conclusion that ComPair accomplished its goals for the balloon campaign. Additionally, two charged particle background rejection schemes are discussed: a soft ACD veto that records a higher charged particle event rate but with less risk of event loss, and a hard ACD veto that limits the charged particle event rate on board. There was little difference in the measured spectra from the soft and hard ACD veto schemes, indicating that the hard ACD veto could be used for future flights. The successes of ComPair's engineering flight will inform the development of the next generation of ComPair with upgraded detector technology and larger active area. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_15916 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Background Measurements and Simulations of the ComPair Balloon Flight Metzler, Zachary Kirschner, Nicholas Smith, Lucas Cannady, Nicholas Sasaki, Makoto Shy, Daniel Caputo, Regina Kierans, Carolyn Bolotnikov, Aleksey Caligiure, Thomas J. Carini, Gabriella A. Crosier, A. Wilder Fried, Jack Ghosh, Priyarshini Griffin, Sean Grove, J. Eric Hays, Elizabeth Herrmann, Sven Kong, Emily Liceaga-Indart, Iker McEnery, Julie Mitchell, John Moiseev, A. A. Parker, Lucas Perkins, Jeremy Phlips, Bernard Schoenwald, Adam J. Sleator, Clio Thompson, D. J. Valverde, Janeth Wasti, Sambid Woolf, Richard Wulf, Eric Zajczyk, Anna Instrumentation and Methods for Astrophysics ComPair, a prototype of the All-sky Medium Energy Gamma-ray Observatory (AMEGO), completed a short-duration high-altitude balloon campaign on August 27, 2023 from Fort Sumner, New Mexico, USA. The goal of the balloon flight was the demonstration of ComPair as both a Compton and Pair telescope in flight, rejection of the charged particle background, and measurement of the background $γ$-ray spectrum. This analysis compares measurements from the balloon flight with Monte Carlo simulations to benchmark the instrument. The comparison finds good agreement between the measurements and simulations and supports the conclusion that ComPair accomplished its goals for the balloon campaign. Additionally, two charged particle background rejection schemes are discussed: a soft ACD veto that records a higher charged particle event rate but with less risk of event loss, and a hard ACD veto that limits the charged particle event rate on board. There was little difference in the measured spectra from the soft and hard ACD veto schemes, indicating that the hard ACD veto could be used for future flights. The successes of ComPair's engineering flight will inform the development of the next generation of ComPair with upgraded detector technology and larger active area. |
| title | Background Measurements and Simulations of the ComPair Balloon Flight |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2506.15916 |