IGR J17254-3257

Other name = 1RXS J172525.5-325717

Type Mass Radio Counterpart Optical Counterpart
R.A. (J2000) Dec. (J2000) References (position) R.A. (J2000) Dec. (J2000) References (position)
Neutron star/ X-ray Burster 17h 25m 24.85s -32o 57' 16.5" Zolotukhin 2009 ATel 2032
Published Papers
Miscellaneous :
Stephen et al. 2005:
  • B~18-19.
Brandt et al. 2006 Atel 778:
  • Type I X-ray Burst
Chenevez et al. 2007 A&A:
  • XMM refinement of the X-ray position
  • rules out the counterpart suggested by Stephen et al. based on the position of the Rosat object.
  • analysis of 2 bursts, which were soft and for which no emission is detected above 20 keV.
  • First burst is well fitted with a single bb model with kT=1.4keV.
  • Second (and longer) one analysis of the peak spectrum and the decay phase. A single bb fits the data well, with temperature decreasing from 1.6 keV to 1.2 keV.
  • Upper limit to the distance of 14.5kpc.
  • Second burst is more unusual than first and may be pure He ignition.
  • Conclude that the long burst results from the ignition of a large pile of He under a steady H burning shell. The short burst occur when a weak hydrogen flash tirggered a mixed H/He burst.
Zolotukhin 2009 ATel 2032:
  • single point source within XMM error box seen in the I-band image
  • I = 19.1
  • Another I=19.7 object 2.7" away from the centre of XMM-Newton position => cannot be completely ruled out as the counterpart
Ratti et al. 2010:
  • Chandra+optical observations
  • 11 additional objects in optical images

Last updated 20 July 2010

Jerome Rodriguez