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| Miscellaneous :
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Krivonos et al. 2009 ATel 2170:
- Swift follow-up => Spectral points only above 2 keV
- Power law fit => Γ=-0.8 (-0.8, +0.6)
- Source intrinsically absorbed
- Faint R counterpart in DSS II plate
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Burenin et al. 2009 ATel 2193:
- Only one source (I~18.7) found within Swift/XRT error box
- Optical spectroscopy => H_alpha emission line at z=0,
- Object is a Galactic X-ray binary
- Optical continuum iconsistent with an absorbed OB-star
- System is a high-mass X-ray binary.
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Lutovinov et al. 2012:
- Optical observations
- Galactic source either XRB or a CV
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Masetti et al. 2013 (A&A):
- Optical / NIR observation + spectroscopy of counterpart
- Hα Hβ and HeII in emission @ z=0
- source is a CV
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