Scientific performance of on-board analyses for the SVOM X-ray telescope MXT
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arXiv
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| Auteurs principaux: | , , , , , , , , , , |
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| Format: | Preprint |
| Publié: |
2026
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| _version_ | 1866914372068048896 |
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| author | Robinet, F. Van Hove, C. Moita, M. Crepaldi, S. Feldman, C. Fort, A. Frandon, O. Götz, D. Maggi, P. Mercier, K. Sauvageon, A. |
| author_facet | Robinet, F. Van Hove, C. Moita, M. Crepaldi, S. Feldman, C. Fort, A. Frandon, O. Götz, D. Maggi, P. Mercier, K. Sauvageon, A. |
| contents | The Microchannel X-ray Telescope on board the Space-based multi-band astronomical Variable Objects Monitor (SVOM) satellite detects and localizes the X-ray afterglow of gamma-ray bursts. One year after the launch, this paper presents the in-flight performance of the scientific analyses conducted by the on-board computer. After summarizing the analysis steps, the paper reviews the on-board results obtained with 15 gamma-ray burst afterglows detected by the telescope between October 2024 and August 2025. For all bursts, the localization uncertainty is estimated to be below 2 arcmin, as required by the mission design. On average, the measured position is found to be 40 arcsec away from the position measured by other experiments with a better sky resolution. Moreover, we show that the on-board analysis provides a precise sky location for the burst only a few seconds after the beginning of the observation. Taking advantage of an efficient very-high-frequency antenna network, this information is quickly collected on the ground and disseminated to other observation facilities. This low-latency strategy is critical for the multi-wavelength and multi-instrument follow-up program of SVOM. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_05342 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Scientific performance of on-board analyses for the SVOM X-ray telescope MXT Robinet, F. Van Hove, C. Moita, M. Crepaldi, S. Feldman, C. Fort, A. Frandon, O. Götz, D. Maggi, P. Mercier, K. Sauvageon, A. Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena The Microchannel X-ray Telescope on board the Space-based multi-band astronomical Variable Objects Monitor (SVOM) satellite detects and localizes the X-ray afterglow of gamma-ray bursts. One year after the launch, this paper presents the in-flight performance of the scientific analyses conducted by the on-board computer. After summarizing the analysis steps, the paper reviews the on-board results obtained with 15 gamma-ray burst afterglows detected by the telescope between October 2024 and August 2025. For all bursts, the localization uncertainty is estimated to be below 2 arcmin, as required by the mission design. On average, the measured position is found to be 40 arcsec away from the position measured by other experiments with a better sky resolution. Moreover, we show that the on-board analysis provides a precise sky location for the burst only a few seconds after the beginning of the observation. Taking advantage of an efficient very-high-frequency antenna network, this information is quickly collected on the ground and disseminated to other observation facilities. This low-latency strategy is critical for the multi-wavelength and multi-instrument follow-up program of SVOM. |
| title | Scientific performance of on-board analyses for the SVOM X-ray telescope MXT |
| topic | Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.05342 |