We have used the Karl G. Jansky Very Large Array to search for 36?GHz and 44?GHz methanol (CH3OH) lines in a sample of 21 Galactic supernova remnants (SNRs). Mainly the regions of the SNRs with 1720?MHz OH masers were observed. Despite the limited spatial extent covered in our search, methanol masers were detected in both G1.4–0.1 and W28. Additional masers were found in Sgr?A?East. More than 40 masers were found in G1.4–0.1, which we deduce are due to interactions between the SNR and at least two separate molecular clouds. The six masers in W28 are associated with the molecular cloud that is also associated with the OH maser excitation. We discuss the possibility that the methanol maser may be more numerous in SNRs than the OH maser, but harder to detect due to observational constraints.
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机译：我们已使用Karl G. Jansky超大型阵列搜索了21个银河超新星残余（SNR）样本中的36？GHz和44？GHz甲醇（CH3OH）谱线。主要观察到SNR为1720？MHz OH masers的区域。尽管我们的搜索范围有限，但在G1.4–0.1和W28中均检测到甲醇激射。在Sgr？A？East中发现了更多的麻烦。在G1.4–0.1中发现了40多个masers，我们推测这是由于SNR与至少两个单独的分子云之间的相互作用所致。 W28中的六个masers与分子云相关联，该分子云也与OH maser激发相关。我们讨论了甲醇maser可能比OH maser的SNR数量更多但由于观测限制而更难检测的可能性。
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