IGR J16457-1916

Other name = 1RXS J165443.5-191620, USNO-A2.0

Type Spin / Orbit. periods Radio Counterpart Infrared/Optical Counterpart
R.A. (J2000) Dec. (J2000) References R.A. (J2000) Dec. (J2000) References
CV/IP 546s/3.7h 16h 54m 43.74s -19o 16' 31.1" Masetti et al. 2010
Published Papers
Miscellaneous :

Masetti et al. 2010:
  • Optical spectroscopy of 1 RXS source
  • Balmer emission lines, and Helium emission lines
  • CV
  • He II(4686)/Hβ >~ 0.5 (EW) => very likely a magnetic CV/IP
Lutovinov et al. 2010:
  • Give the "IGR J" name
  • Swift, INTEGRAL, and BTA optical telescope observations
  • Optical spectrum => strong hydrogen and helium lines in emission, typical of the SED of a disk-accreting white dwarf,=> source is CV
  • Coherent pulsations in optical light curve P~549 s attributed to the spin of the white dwarf
  • System is intermediate polar CV
  • Spectral analysis of X-ray data => partially-absorbed bremsstrahlung kT~21 keV, with NH ~ 8 x 1022 cm-2, covering fraction of ~0.94
  • Mass of the white dwarf ~ 0.85(15) M_sol
Scaringi et al. 2011:
  • Optical photometry and time-resolved spectroscopy
  • Optical photometry => modulations at 546s (=spin period) and 3.7h (orbital period)
  • Time-resolved spec => Hα radial velocity shift modulated on orbital period
  • As all other hard X-ray emitting IP, spin P < 30 min, and Spin to orbital ratio (=0.04) < 0.1

Last updated 4 May 2011

Jerome Rodriguez