论文标题
AT2021ACAK：Zwicky瞬态调查中发现的候选潮汐破坏事件
AT2021acak: a candidate tidal disruption event found in the Zwicky Transient Facility survey
论文作者
论文摘要
我们报告了在Zwicky瞬态设施（ZTF）调查数据中发现的候选潮汐破坏事件（TDE）。该候选人以其瞬态名称AT2021ACAK，显示出$ \ sim $ 1 \，MAG左右MJD〜59500的亮度增长，随后的Power-Laws-Laws-laws-like亮度下降。我们已经使用2.4-M Lijiang望远镜进行了多次光谱观测，并在X射线和紫外线（UV）带上进行了一个观测值，并带有{\ it neil gehrels swift Perservatory（Swift）}。源的光谱显示宽H，HE发射线和FE排放特征。可能检测到源的0.3--2 \，keV X射线和明亮的紫外线发射。我们分析了光光曲线的下降，光谱的发射特征以及构造的宽带紫外线和光谱。从分析中得出的属性与报告的（候选）TDE的属性一致，尤其与Asassn-18JD的属性非常相似。宿主可能是AGN的识别，因此需要对事件和静止的主机进行进一步的观察，以便清楚地了解此瞬态事件的性质。
We report a candidate tidal disruption event (TDE) found in the Zwicky Transient Facility (ZTF) survey data. This candidate, with its transient name AT2021acak, showed brightness increases of $\sim$1\,mag around MJD~59500 and subsequent power-law--like brightness declines. We have conducted multiple optical spectroscopic observations with the 2.4-m Lijiang telescope and one observation at X-ray and ultraviolet (UV) bands with the {\it Neil Gehrels Swift Observatory (Swift)}. The optical spectra of the source show broad H and He emission line and Fe emission features. Possible 0.3--2\,keV X-ray and bright UV emission of the source was detected. We analyze the declines of the optical light curves, the emission features of the optical spectra, and the constructed broad-band UV and optical spectrum. The properties derived from the analyses are consistent with those of reported (candidate) TDEs, and in particular very similar to those of ASASSN-18jd. The identification is complicated by the host being likely an AGN, and thus further observations of the event and quiescent host are required in order to have a clear understanding of the nature of this transient event.
