The whole Sloan Digital Sky Survey (SDSS, ) has been searched for intergalactic globular clusters (IGCs) in the Local Group (LG). Using optical, infrared, and ultraviolet photometric selection criteria and photometric redshifts, the objects in the SDSS Galaxy Catalog were reduced to only 183,791 brighter than that might be GCs. Visual examination of their SDSS images recovered 84% of the confirmed GCs in M31 and M33 and yielded 17 new GC candidates, 5 of them of high confidence, which we could confirm as GCs in MegaPrime images from the Canada–France–Hawaii Telescope. These 5 GCs are within M31's halo, but the other 12 candidates are not close to LG galaxies or galaxies within 3 Mpc of the LG. Even though this search covers only one-third of the sky and some GCs could have been missed, it suggests that the LG does not contain a large population of IGCs more luminous than . In the direction of the M81 Group, the search yielded five candidate GCs, probable members of that group.
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机译：已在整个Sloan Digital Sky Survey（SDSS，）中搜索了本地组（LG）中的星系间球状星团（IGC）。使用光学，红外和紫外光度选择标准和光度红移，SDSS Galaxy目录中的对象被减少到仅比GC明亮183,791亮。对其SDSS图像进行目视检查，在M31和M33中恢复了84％的已确认GC，并产生了17个新的GC候选对象，其中5个具有高可信度，我们可以将其确认为来自加拿大-法国-夏威夷望远镜的MegaPrime图像中的GC。这5个GC位于M31的光晕范围内，但其他12个候选对象与LG星系或LG 3 Mpc之内的星系并不接近。即使此搜索仅覆盖了天空的三分之一，并且可能会漏掉一些GC，但它表明LG所包含的IGC数量并不比LTC发光的数量更多。在M81组的指导下，搜索产生了五个候选GC，可能是该组的成员。
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