Detection of Oscillations in a Type I X-Ray Burst of 4U 0614+091 with SVOM/ECLAIRs
Abstract
On 2025 January 10, a thermonuclear (Type I) X-ray burst from the neutron star low-mass X-ray binary (LMXB) 4U 0614+091 was detected with the ECLAIRs instrument on board the Space-based multiband astronomical Variable Object Monitor mission. We present here a time-resolved spectroscopic analysis of the burst, along with the detection of burst oscillations within a 51 s interval during the decay phase. The oscillation frequency is measured to be ν = 413.674 ± 0.002 Hz, consistent with previous reports. However, we detect a significant downward frequency drift over the burst duration, characterized by ν̇=(−4.7±0.3)×10−3Hzs−1. This frequency evolution is atypical compared to those observed in similar burst oscillation sources. We tentatively attribute the observed drift to a Doppler shift induced by orbital motion. Under this interpretation, the inferred orbital period must be shorter than 20 minutes, placing 4U 0614+091 among the most compact known LMXBs.
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BibTeX
@article{stum2026detection,
title = {{Detection of Oscillations in a Type I X-Ray Burst of 4U 0614+091 with SVOM/ECLAIRs}},
author = {Sebastien Le Stum and Floriane Cangemi and Alexis Coleiro and Sebastien Guillot and Jeróme Chenevez and Philippe Bacon and Nicolas Bellemont and Laurent Bouchet and Tristan Bouchet and Cecile Cavet and Bertrand Cordier and Antoine Foisseau and Olivier Godet and Andrea Goldwurm and Xuhui Han and Cyril Lachaud and Zhaosheng Li and Huali Li and Yulei Qiu and Jeróme Rodriguez and Wenjun Tan and Lian Tao and Lauryne Verwaerde and Chenwei Wang and Jing Wang and Jianyan Wei and Chao Wu and Wenjin Xie and Liping Xin and Shaolin Xiong and Shuangnan Zhang and Shijie Zheng},
journal = {Astrophys.J.Lett.},
year = {2026},
month = aug,
doi = {10.3847/2041-8213/ae3174},
eprint = {2601.09691},
archivePrefix = {arXiv},
url = {https://hal.science/hal-05502028v1},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Detection of Oscillations in a Type I X-Ray Burst of 4U 0614+091 with SVOM/ECLAIRs
AU - Sebastien Le Stum
AU - Floriane Cangemi
AU - Alexis Coleiro
AU - Sebastien Guillot
AU - Jeróme Chenevez
AU - Philippe Bacon
AU - Nicolas Bellemont
AU - Laurent Bouchet
AU - Tristan Bouchet
AU - Cecile Cavet
AU - Bertrand Cordier
AU - Antoine Foisseau
AU - Olivier Godet
AU - Andrea Goldwurm
AU - Xuhui Han
AU - Cyril Lachaud
AU - Zhaosheng Li
AU - Huali Li
AU - Yulei Qiu
AU - Jeróme Rodriguez
AU - Wenjun Tan
AU - Lian Tao
AU - Lauryne Verwaerde
AU - Chenwei Wang
AU - Jing Wang
AU - Jianyan Wei
AU - Chao Wu
AU - Wenjin Xie
AU - Liping Xin
AU - Shaolin Xiong
AU - Shuangnan Zhang
AU - Shijie Zheng
PY - 2026
DA - 2026/08/31
JO - Astrophys.J.Lett.
DO - 10.3847/2041-8213/ae3174
UR - https://hal.science/hal-05502028v1
AB - On 2025 January 10, a thermonuclear (Type I) X-ray burst from the neutron star low-mass X-ray binary (LMXB) 4U 0614+091 was detected with the ECLAIRs instrument on board the Space-based multiband astronomical Variable Object Monitor mission. We present here a time-resolved spectroscopic analysis of the burst, along with the detection of burst oscillations within a 51 s interval during the decay phase. The oscillation frequency is measured to be ν = 413.674 ± 0.002 Hz, consistent with previous reports. However, we detect a significant downward frequency drift over the burst duration, characterized by ν̇=(−4.7±0.3)×10−3Hzs−1. This frequency evolution is atypical compared to those observed in similar burst oscillation sources. We tentatively attribute the observed drift to a Doppler shift induced by orbital motion. Under this interpretation, the inferred orbital period must be shorter than 20 minutes, placing 4U 0614+091 among the most compact known LMXBs.
ER -