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XMM-Newton
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INTRODUCTION:


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XMM EPIC Catalog
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Reference: Natalie Webb et al. (2020) 
https://ui.adsabs.harvard.edu/abs/2020A%26A...641A.136W/abstract

URL:
http://xmmssc.irap.omp.eu/Catalogue/4XMM-DR10/4XMM-DR10_Catalogue_User_Guide.html#Catalogue

Cone-search program
 csEPIC [-r CONERADIUS(arcsec)] [-s] RA(deg) DEC(deg)
 -r ... coneradius in arcseconds
 -s ... show header

$ cat RAd DECd
$ cat file | csEPIC 	#accepts input from a pipe
$ csEPIC $(cat file)    #accepts input from a sub-process
  where file are either two columns (ra,dec) or simply a sequential stream
  of (ra,dec)