We conducted photometric and spectroscopic observations of Ross 15 in order to further study the flare properties of this less observed flare star. A total of 28 B-band flares are detected in 128 hr of photometric observations, leading to a total flare rate of hr⁻¹, more accurate than that provided by previous work. We give the energy range of the B-band flare (10^29.5 – 10^31.5 erg) and the flare frequency distribution (FFD) for the star. Within the same energy range, the FFD is lower than that of GJ 1243 (M4) and YZ CMi (M4.5), roughly in the middle of those of three M5-type stars and higher than the average FFDs of spectral types ≥ M6. We performed, for the first time for Ross 15, simultaneous high-cadence spectroscopic and photometric observations, resulting in detection of the most energetic flare in our sample. The intensity enhancements of the continuum and Balmer lines with significant correlations between them are detected during the flare, which is the same as those of other deeply studied flare stars with similar spectral type.

我们对罗斯 15 进行了光度和光谱观测，以进一步研究这颗观测较少的耀星的耀斑特性。在 128 小时的光度观测中总共检测到28 个B波段耀斑，导致总耀斑率hr ^-1，比以前的工作提供的更准确。我们给出了B波段耀斑的能量范围 (10 ^29.5 – 10 ^31.5erg）和恒星的耀斑频率分布（FFD）。在相同能量范围内，FFD低于GJ 1243（M4）和YZ CMi（M4.5），大致处于三颗M5型恒星的中间值，高于光谱类型≥M6的平均FFD . 我们首次为罗斯 15 号同时进行高节奏光谱和光度观测，从而检测到我们样本中能量最高的耀斑。在耀斑过程中检测到连续谱线和巴尔默谱线的强度增强，它们之间具有显着的相关性，这与其他深入研究的具有相似光谱类型的耀斑星的强度增强相同。