IGR J19308+0530

Other name = (?)

Type/Spectral Type Orb P. Radio Counterpart Infrared/Optical Counterpart
R.A. (J2000) Dec. (J2000) References R.A. (J2000) Dec. (J2000) References
Neutron star L/I MXB
F 4-6 V
14.662 hr TYC 486-295-1
aka 2MASS J19305075+0530582
Rodriguez et al. 2008
Published Papers
Miscellaneous :
Rodriguez et al. 2008:
  • Refined X-ray position => Optical and IR counterpart
  • Blend of sources at optical not excluded
  • J=9.617, H=9.245, K=9.130, V=11.0, B=11.3, U<11.9, mUVM2=12.5, mUV>2=20.2
  • Absorbed power law fits 0.5-9 keV spectra well, Γ= 3 NH<0.3 x1022cm-2; F2-10 keV=8.2 x 10-14 erg/s/cm2
  • Black body also fits the spectrum well, kT=0.26 keV
  • Distance not greater than 1kpc, then NS XRB or CV.
  • If much closer than 1kpc, CV favoured
Ratti et al. 2010:
  • Chandra and Optical observations
  • Source is probably not a CV given the very soft Swift spectrum
  • confirm the association of IGR/Chandra source with TYC and 2MASS sources
  • Source is a LMXB or IMXB
Ratti et al. 2013 (MRAS):
  • Phase resolved spectro and photmetry of optical counterpart
  • Optical spectra dominated by absorption features+ 10-20 % contribution from disc
  • Orbital period 14.662 hr
  • Mass ratio M2/M1=1.78 => large for stable Roche lobe overflow
  • Inclination 50°

Last updated 29 Jan. 2013

Jerome Rodriguez