IGR J17177-3656

Other name = (?)

Type Redshift Radio Counterpart Infrared/Optical Counterpart
R.A. (J2000) Dec. (J2000) References R.A. (J2000) Dec. (J2000) References
17h 17m 42.59s -36o 56' 04.4" Corbel & Tzioumis 2011 ATel 3246
Published Papers
Miscellaneous :
Frankowski et al. 2011 ATel 3223:
  • IBIS/ISGRI spectrum well fitted with a power law with Γ=1.8
Zhang et al. 2011 ATel 3226:
  • Swift pointing => exclude 1st proposed optical counterpart
  • Spectral analysis of two pointings which show no significant evolution of the parameters.
  • Absorbed powerlaw fits the data well: NH = 3.7 x1022 cm-2 and Γ=1.45
  • 2MASS J17174269-3656039 has J=15.2, H=13.9 and K=12.9 and is present in the NOMAD and GLIMPSE catalogs
  • NVSS J171743-365606 is also found at a position consistent with that of the X-ray source
Paizis et al. 2011 ATel 3236:
  • Chandra pointing => exclude all previously proposed optical counterparts
  • Spectral analysis => NH=5.9 x1022 /cm2 (larger than the expected absorption through the Galaxy) and Γ=1.2
Torres et al. 2011 ATel 3241:
  • no counterpart within the Chandra error box
  • 2MASS source at 1" => Not associated (colour)
  • Faint source in their images at 1" =>rule it out based on the separation to the X-ray source.
  • Counterpart to the IGR not brighter than 17.5 mag (in Ks band) at the time of their observations.
Corbel and Tzioumis ATel 3246:
  • Discovery of a radio source within the Chandra error box
  • Flux densities ~0.24 mJy at 5500 MHz and ~0.20 mJy at 9000 MHz
  • Spectral index poorly constrained (alpha = -0.37+/- 0.79)
  • Radio spectrum either compact jet or a discrete ejection event
  • Could be a BH in a hard state, or radio = resudual radio emission from a discrete ejection.
Rojas ATel 3275:
  • No detection any IR source within the Chandra error with limits of J~19.5, H~18.0 and K~18.0
  • Presence of two sources just outside the Chandra error box=> from possible variations of the magnitudes of one, possible association to the IGR is mentioned
Paizis et al. 2011 (ApJ):
  • Chandra and multiwavelengths observations
  • Time resolved X-ray spectroscopy => variations of NH
  • Position of source in radio-X-ray diagram compatible with H1743-322 if at 8 kpc
  • Discussion on the type of source=> LMXB favoured, Black Hole candidate suggested
Ma 2012 (MNRAS):
  • Nearly-simultaneous broadband energy spectrum=> input to an accretion-jet model
  • Results indicate that the accretion is probably driven by luminous hot accretion flow (LHAF)
  • Distance of between 21 and 25 kpc is proposed (assuming a 10 Msun black hole
  • The results lend credence to the view that the LHAF can explain the steep correlation between the radio and X-ray luminosity

Last updated 4 Apr. 2012

Jerome Rodriguez