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| Miscellaneous :
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Ricci et al. 2008,
ATel 1840:
- Swift and INTEGRAL analysis
- 0.3-7 keV spectrum <=> absorbed power law,
NH= 1.7e21 cm-2 and a photon index 1.86.
- The hard X-ray spectrum <=> single power law with a
photon index 2.8, or by a black body with kT ~ 7keV.
- UV counterpart: U=18.4 mag and UVW2=18.1 mag
- No source in the 2MASS and NVSS data
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Remillard and Levine 2008,
ATel 1853 :
- Mission long ASM light curve shows that the source is a long-term, faint transient, whose
current outburst began in late 2005 or early 2006.
- Weakly detected at 3.1 mCrab (53600 to 53800), rose to 5.1 mCrab
(53800 to 54540), and reached 6.3 mCrab (54540 to 54794)
- Hardness ratio (HR2 = 1.3) from the last interval =>Soft X-ray
transient
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Degenaar et et al. 2012,
ATel 4219 :
- Swift observations
- ~200s broad peak => event due to a thermonuclear X-ray burst
- Further discussions and considerations => source is a neutron star LMXB
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Degenaar et et al. 2013 (ApJ) :
- Swift analysis of type-I X-ray burst (from 2012 June 25)
- Episode of ~10 min with strong intensity
fluctuation during the 18 min long X-ray tail.
- X-ray spectral analysis: highly significant emission line around ~1 keV interpreted as a Fe-L shell
line caused by irradiation of cold gas
- Significant absorption lines and edges in the Fe-K band detected =>presence of hot, highly
ionized gas along the line of sight
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Degenaar et et al. 2013 (ApJ) :
- Swift analysis of type-I X-ray burst (from 2012 June 25)
- Episode of ~10 min with strong intensity
fluctuation during the 18 min long X-ray tail.
- X-ray spectral analysis: highly significant emission line around ~1 keV interpreted as a Fe-L shell
line caused by irradiation of cold gas
- Significant absorption lines and edges in the Fe-K band detected =>presence of hot, highly
ionized gas along the line of sight
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