In this paper, we present a comprehensive catalog of short bursts from magnetars based on eight years of NICER observations. A total of 1130 bursts were identified from 14 sources, with the sample dominated by SGR 1935+2154, which accounts for 76% of all detected bursts. We analyzed burst durations, spectral properties, and their correlations across multiple sources. Bursts from SGR 1935+2154 exhibit significantly longer durations, with a distribution peak at 316 ms, compared to a peak of 23 ms for bursts from other magnetars. Two {\mu}s-scale bursts were detected for the first time, originating from 1E 1048.1-5937 and CXOU J010043.1-721134. Spectral analysis in the 0.5-8 keV range using both blackbody and power-law models shows that bursts with higher fluences have harder spectra. In contrast, correlations between burst duration and spectral parameters are weak or absent. This catalog provides a valuable dataset for studying magnetar short bursts, enabling future modeling efforts and improving our understanding of the diversity and physical mechanisms of magnetar bursts.
@article{arxiv.2512.12291,
title = {NICER Magnetar Burst Catalog},
author = {Che-Yen Chu and Chin-Ping Hu and Teruaki Enoto and George A. Younes and Andrea Sanna and Sebastien Guillot and Rachael Stewart and Zaven Arzoumanian and Matthew G. Baring and Marlon L. Bause and Tolga Güver and Wynn C. G. Ho and Chryssa Kouveliotou and Alex Van Kooten and Zorawar Wadiasingh and Keith C. Gendreau},
journal= {arXiv preprint arXiv:2512.12291},
year = {2026}
}
Comments
16 pages, 11 figures, 4 tables, accepted for publication in ApJS