IGR J18173-2509

Other name = XMMLS1 J181722.2-250838, 1RXS J181723-250831

Type Pulse Period Radio Counterpart Infrared/Optical Counterpart
R.A. (J2000) Dec. (J2000) References R.A. (J2000) Dec. (J2000) References
CV/IP 1660s 18h 17m 22.25s -25o 08' 42.9" Masetti et al. 2008 ATel 1620
Published Papers
Miscellaneous :
Ibarra et al. 2008 ATel 1397:
  • INTEGRAL, XMM and Rosat source probably associated
Landi et al. 2008 ATel 1437:
  • Swift/XRT observation
  • Two optical objects in XRT error box
  • X-ray spectrum fitted by the combination of two power law of similar indices (Gamma~0.6), one being absorbed by the Galactic column density only, the other by higher absorption with Nh~6.7e22 cm-2.
  • XRT image here (courtesy R. Landi)
Masetti et al. 2008 ATel 1620:
  • Balmer (up to Hδ at least), HeI and HeII emission lines at z=0, superimposed on a rather blue continuum.
  • Spectral characteristics of the source=>Galactic Cataclysmic Variable.
Masetti et al. 2009 :
  • d~330pc
  • Av=0.67
Tomsick et al. 2009 :
  • Chandra observations
  • Chandra spectrum well represented by single power law
  • NH=0.11 x 1022 cm-2, Γ=-0.28
Nichelli et al. 2009ATel 2354 :
  • Periodic signal at ~830.7 in a Swift observation
  • Re-analysis of Chandra archival observation => strong signal at about 1660s.
  • True period of the source is 1660s, a pulsed fraction ~50%.
Bernardini et al. 2012 (A&A):
  • Multi-wavelengths observations
  • Source is an IP
  • Pulse and orbital periods = 831s (2ω), 6.3-8.7 hr
  • Broad band spectral analysis
  • MWD~0.96 Msun at d~610 pc
Thornstensen & Halpern 2013 (ApJ):
  • Optical observations => V=16.9 +-0.2
  • Results consistent with previous ones => Blue continuum, double peaked Hα emission line
  • Periodicity (radial profile) at 91.9 minutes (but not entirely reliable) that might be the orb. period.

Last updated 9 October 2013

Jerome Rodriguez