IGR J01572-7259

Other name = IGR J015712-7259

Type Spin/Orb periods Radio Counterpart Infrared/Optical Counterpart
R.A. (J2000) Dec. (J2000) References R.A. (J2000) Dec. (J2000) References
Possible Be-HMXB 11.6s / 35.6d
Published Papers
Miscellaneous :
Coe et al. 2008 ATel 1882:
  • Discovery with INTEGRAL, Swift and RXTE follow ups
  • Pulsation at 11.6s
  • USNO counterpart with R=15.4
  • Source is an HMXB in the Magellanic Bridge
Bodaghee et al. 2009 ATel 2252:
  • Swift soft X-ray spectral analysis
  • 0.5-7 keV spectrum can be fit with an absorbed, hard power law with γ~0.9, NH ~4x1021 cm-2 =>small amount of material obscures the source
  • L2-10 keV, unabs~4e36 erg/s @ 55kpc
McBride et al. 2010 :
  • USNO B1.0 source with B~15.5
  • Swift XRT light curve => pulsation at 11.57809 s
  • Spectral analysis of the Swift+INTEGRAL spectra=>absorbed power law with a high energy cut-off, Γ=0.4 and an EFOLD=8 keV.
  • Transient nature +results (pulsation, hard spectrum,..) => probably a Be-HMXB
Segreto et al. 2013 (A&A):
  • Analysis of Swift BAT and XRT data
  • Discovery of 35.6d orbital period
  • Spectral analysis =>absorbed (NH < 5e20 cm-2) cutoff power law with Γ~0.4 and Ecut~13 keV
Schmidtke et al. 2013 ATel 5473:
  • Examination of three seasons of OGLE-IV I-band
  • Small outburst in seasons 1 and 2, in the 3rd the source is the dimmest
  • In season 1 optical period found at P=35.1
  • Folded light curve => narrow, asymmetrical outburst sharp rise / gradual decline, typical of Be/X-ray binary
  • X-ray and optical outbursts nearly coincident => reinforces the interpretation that they are orbital signatures.

Last updated 16 Oct. 2013

Jerome Rodriguez