IGR J17407-2808

Other name = CXOU J174042.0-280724

Type Mass Radio Counterpart Infrared Counterpart
R.A. (J2000) Dec. (J2000) References (position) R.A. (J2000) Dec. (J2000) References (position)
probable LMXB 17h 40m 42.01s -28d 07m 25.0s (+-0.1") Greiss et al. ATel 3688
Published Papers
Miscellaneous :

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)
Sguera et al. 2006 :
  • Candidate FXRT
  • Candidate HMXB
  • 20-60 keV peak flux of 805 mCrab
  • short outburst of ~3 minutes
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
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
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.
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.
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

Last updated 3 Nov. 2011

Jerome Rodriguez