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Acknowledgements
We have extracted archival data from the Chandra Data
Archive, and the data analysis was supported by the CXC
CIAO software and CALDB. We have used the NASA NED and
ADS facilities. The computations in this paper were
conducted on the Smithsonian High Performance Cluster
(SI/HPC). This work was supported by the Chandra GO
grants (AR4-15005X and AR5-16007X), by Smithsonian
Competitive Grant Program for Science, by Smithsonian
2018 Scholarly Study Program and by NASA contract NAS8-
03060 (CXC).
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