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| Miscellaneous :
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Gibaud et al. 2011ATel 3565:
- INTEGRAL discovery=> IBIS spectrum well fitted by a power law with Γ=2.6
- Globular cluster NGC 6388 within IBIS error box
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Ferrigno et al. 2011ATel 3566:
- Swift pointed observation => source is within the Globular Cluster NGC 6388
- X-ray spectrum well represented by absorbed power-law with Γ~ 0.7 and NH<2.6 x1021 cm-2.
- Difference of IBIS and XRT spectral slopes suggest turn over typical of LMXBs and accreting binaries
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Wijnands et al. 2011ATel 3595:
- Swift monitoring => source flux ~constant over 9 days
- Source is a very faint X-ray transient
- Possibly a neutron star LMXB, or intermediate mass black hole
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Ferrigno et al. 2011 ATel 3617& Bozzo et al. 2011(A&A):
- No hint of radio emission was found with ATCA within 4 arcmin with RMS
noise levels of 14.1 muJy, 19.0 muJy, 20.0 muJy, and 21.2 muJy at
respectively 5.5, 9, 17, and 19 GHz
- Fits to the 0.5-100 keV spectrum (Swift/INTEGRAL)=> absorbed black body plus a cut off power law (Nh=0.8e22 cm-2, Gamma=1.0,
Ecut=24 keV, kTbb=0.08 keV)
- Radio-X-ray fundamental plane =>not associated with the IMBH
- Black hole nature not favoured.
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Pooley et al. 2011ATel 3627:
- Chandra observations => refined position
- 2.7" from the centre of the Globular cluster => not associated to IMBH
- not associated to any previously known source in the cluster
- quiescent luminosity (from previous and deeper obs) => 1e31 erg/s
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Nucita et al. 2012 (New Astr.):
- XMM slew observations
- Spectral analysis => slight evolution of Γ compared to Swift
- Discussion about nature of the source, LMXB preferred
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Del Santo et al. 2014 (MNRAS):
- Analysis of 200 days Swift/XRT observations
- Light curve shows a t-5/3 trend + thermal emission with no significant
variations with time
- Investigate the possibility of a tidal disruption event
- In this case estimate accretion efficiency consistent with a massive white dwarf.
- Obtained mass of the disrupted body and the accretion efficiency => inner disc temp
0.04 keV constistent with the value obtained from the spectral fits
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Bozzo et al. 2014 (A&A):
- Analysis of XMM-Newton observation
- Spectral modeling compatible with that of Swift/RXTE, in particular confirm the presence of 0.08 keV thermal component
- Discovery of 100 mHz qQPO
- Data compatible with TDE although other possibilities cannot be completely ruled out
- Light curve shows a t-5/3 trend + thermal emission with no significant
variations with time
- Investigate the possibility of a tidal disruption event
- In this case estimate accretion efficiency consistent with a massive white dwarf.
- Obtained mass of the disrupted body and the accretion efficiency => inner disc temp
0.04 keV constistent with the value obtained from the spectral fits
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