Southern HII Region Discovery Survey (SHRDS): Dataset 3

The Southern HII Region Discovery Survey is an Australia Telescope Compact Array 4-6 and 8-10 GHz radio continuum and radio recombination line survey of Milky Way HII regions (Wenger et al., 2021). This data archive contains all relevant intermediate data products from the final SHRDS data release (the Full Catalog). For each observed HII region and calibrator field, this archive contains (1) a 4 GHz bandwidth, full-Stokes, multi-scale, multi-frequency synthesis (MS-MFS) continuum FITS image, (2) up to sixteen 256 MHz bandwidth, full-Stokes, MS-MFS continuum FITS images covering the full 4 GHz bandwidth, (3) a Stokes I MS-MFS FITS image of each RRL transition, (4) a Stokes I multi-scale FITS data cube of each RRL transition, and (5) a FITS image containing the watershed segmentation region for each identified HII region at each observed frequency. The archive also includes the relevant residual images/cubes and primary beam images for all of these data products, as well as all of the images and cubes smoothed to a common angular resolution.\nLineage: Australia Telescope Compact Array project code C2842 and C2963. See Wenger et al. 2021.南部HII区巡天（Southern HII Region Discovery Survey, SHRDS）是依托澳大利亚致密阵列望远镜（Australia Telescope Compact Array, ATCA）开展的银河系HII区4~6 GHz与8~10 GHz射电连续谱及射电复合线（Radio Recombination Line, RRL）巡天项目（Wenger等，2021）。本数据存档包含最终SHRDS数据发布版本（全星表）的全部相关中间数据产物。针对每个观测的HII区与校准器天区，该存档包含以下五类数据： 1. 带宽4 GHz、全斯托克斯（full-Stokes）、多尺度多频率合成（multi-scale multi-frequency synthesis, MS-MFS）射电连续谱FITS图像； 2. 最多16幅带宽256 MHz、全斯托克斯、MS-MFS射电连续谱FITS图像，覆盖全部4 GHz带宽； 3. 每条射电复合线跃迁对应的斯托克斯I（Stokes I）分量MS-MFS FITS图像； 4. 每条射电复合线跃迁对应的斯托克斯I多尺度FITS数据立方体； 5. 包含各观测频率下已识别HII区分水岭分割区域的FITS图像。 本存档还涵盖上述所有数据产物对应的残差图像/数据立方体与主波束图像，以及全部经平滑处理至统一角分辨率的图像和数据立方体。 数据谱系：隶属于澳大利亚致密阵列望远镜项目编号C2842与C2963，相关细节参见Wenger等人2021年的研究成果。