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| Miscellaneous :
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| Short flares (up to 0.8±0.1 Crab and 0.6±0.1 Crab in the 20-40, 40-60 keV ranges) led to trigger of the INTEGRAL Burst Alert System (usually for GRBs) |
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Sguera et al. 2006 :
- Candidate FXRT
- Candidate HMXB
- 20-60 keV peak flux of 805 mCrab
- short outburst of ~3 minutes
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Tomsick et al. 2008:
- Chandra reveals 7 sources within INTEGRAL error box.
- No Chandra source detected within the 16" Rosat error of 2RXP J174040.9-280852
- Upper limit on the 0.3-10 keV source flux 6.0-7.2e-14 erg/s/cm2 assuming Γ=2.1
- SFXT nature not dismissed
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Heinke et al. 2009:
- Chandra, Suzaku and XMM observations
- CXOU J174042.0-280724 is the soft X-ray counterpart to
IGR J17407-2808, based on similarity of variability in flux, column density an hard spectra
- NH~1.7 x 1022, Γ ~ 0.9
- No periodic pulsations, no optical/IR counterparts found
- Neutron star of BH primary suspected
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Romano et al. 2011 ATel 3685:
- Outburst seen by Swift-BAT
- Swift-XRT => position consistent with the Chandra position
- XRT light curve => peak of 10 cps with a dynamic range of 100
- Spectrum => NH ~ 1.5 x 1022 cm-2 with Γ~0
- Not detected with Swift-UVOT.
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Greiss et al. 2011 ATel 3688:
- Examined recent near-infrared VVV Survey observations of the field during quiescence
- Potential infrared counterpart at 0.67 arcsec from (and consistent with) CXOU J174042.0-280724
- J = 15.1, H = 15.0, and Ks = 14.9
- Same star found with CTIO at a dereddened r-band magnitude of 16.2
- Suggest a late F-type dwarf at a distance of ~4 kpc
- Supergiant companion ruled out => not a SFXT candidate, but likely to be a LMXB.
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Kaur et al. 2011 ATel 3695:
- Confirm the NIR counterpart from Ks band observation with the WIYN telescope
- Ks~16.6 mag star detected at a position consistent with the known Chandra and IR positions
- Variability of the NIR counterpart => further confirmation of association with the IGR and CXOU sources
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