New ASKAP images of the Abell 3627 cluster and the Corkscrew Galaxy

This collection contains new images from our paper entitled: "ASKAP reveals the radio tail structure of the Corkscrew Galaxy shaped by its passage through the Abell 3627 cluster". These are re-imaged ASKAP data products used in Koribalski et al. (2024, MNRAS, in press: https://arxiv.org/abs/2405.04374). The collection includes FITS images obtained after additional self-calibration and imaging of pre-calibrated data products retrieved from CASDA. The two SBIDs included are SB11816 (at 1367.5 MHz) and SB53218 (at 943.5 MHz), with images only covering the cluster Abell 3627 (Norma Cluster) instead of the full field of view.

Maps of the position-dependent root-mean-square noise and spectral index maps derived from the images and described in the paper are also included. Images, DS9 region files, and tables associated with measurements of the spectral index in regions are also provided.

The central effective frequency of each image is included in the file name, and the frequency range is included for spectral index maps. File names also typically include the image weighting, and “shift” in the filename indicates astrometric corrections have been applied as described in the paper. Files with “rgd” in their name are used for the corresponding spectral index maps after convolving images to a common resolution and regridding to a common image grid/projection. For more detail of the included images and the imaging procedure, please see the aforementioned paper.

本数据集包含来自我们题为《ASKAP揭示螺旋星系（Corkscrew Galaxy）因穿越Abell 3627星系团而形成的射电尾结构》的论文中的全新图像。这些是用于Koribalski等人（2024年，《皇家天文学会月刊（MNRAS）》，已录用：https://arxiv.org/abs/2405.04374）研究的经重新成像的澳大利亚平方千米阵列探路者（ASKAP）数据产品。本数据集包含从ASKAP数据档案库（CASDA）获取的预校准数据产品，经额外自校准与成像后得到的柔性图像传输系统（FITS）格式图像。本次数据集包含两个观测块编号（SBID）：SB11816（中心频率1367.5 MHz）与SB53218（中心频率943.5 MHz），且图像仅覆盖Abell 3627星系团（矩尺座星系团（Norma Cluster）），而非全视场范围。

本数据集还包含从图像中提取、并在论文中阐述的位置相关均方根噪声图与谱指数图。此外还提供了与区域内谱指数测量相关的图像、DS9区域文件以及表格。

每张图像的中心有效频率均标注于文件名中，谱指数图的文件名则包含其频率范围。文件名通常还包含图像加权信息，文件名中的"shift"字样表明已按照论文所述完成天体测量校正。文件名含"rgd"的文件为将图像卷积至统一分辨率并重采样至统一图像网格/投影后得到的对应谱指数图。如需了解包含图像与成像流程的更多细节，请参阅前文提及的论文。