Dictionary of Nomenclature of Celestial Objects

§NN
N: 10
Object:(X)  (SIMBAD class: X = X-ray Source)
Stat:is completely incorporated in Simbad
Note:ROSAT PSPC and HRI observations.
Sources S1, S2, S3, S7 and S9 are possibly foreground sources.
in source:M 101 = NGC 5457
Ref:=1995ApJ...439..132W
byWILLIAMS R.M. , CHU Y.-H.
 Astrophys. J., 439, 132-144 (1995)
  X-ray emission from giant HII regions in M 101.
oTable 2: <[WC95] SNN> (Nos S1-S10)

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