IGR J22534+6243

Other name = 1RXS J225352.8+624354

Type Spin / Orb. period Radio Counterpart Infrared/Optical Counterpart
R.A. (J2000) Dec. (J2000) References R.A. (J2000) Dec. (J2000) References
HMXB 46.67366s USNO-B1 1527-0428738
2MASS J22535512+6243368
Landi et al. 2012 ATel 4166
Published Papers
Miscellaneous :
Landi et al. 2012ATel 4166 :
  • Swift follow up
  • Association with 1RXS source, USNO B1 and 2MASS objects
  • R ~13, B~ 15.5, J ~11.6, H ~11.0, and K ~10.5
  • X-ray spectrum: absorbed (NH(Gal) = 8.96e21 cm-2, NH(intr) ~1.1e22 cm-2) power law (Γ ~1.4)
  • Location on the Galactic plane, X-ray spectral properties, and the lack of any evident radio counterparts => Galactic nature
Halpern 2012ATel 4240 :
  • Source field previously observed with Chandra
  • 46.673 pulsation in all Chandra observations,
  • Pulsation is also present in the Swift data although at a slightly different period.
  • Source is suggested to be a reddened HMXB
Israel et al. 2012ATel 4241 :
  • Pulsations at 46.6s in the Chandra data.
  • Pulsation in the Swift data, and detection of this pulse signal at 46.406s in archival (1993) Rosat data
  • Preliminary period derivative of 5e-10 s/s
Masetti et al. 2012ATel 4248 :
  • Optical spectroscopic observations
  • Spectral continuum highly reddened, intrinsically blue with superimposed Hα, Hβ and He I emissions at redshift zero (plus several absorption lines)
  • Typical of an absorbed HMXB => HMXB nature confirmed
Esposito et al. 2013 (MNRAS) :
  • X-ray pulsations at 46.67366 s (see previous ATel)
  • Optical follow up of the 2MASS counterpart with the NOT => source is a B 0-1 III-Ve with preference for B1 Ve
  • Favoured distance 4-5 kpc
  • L~3e34 erg/s
  • New member of class of low luminosity long orbital period persistent Be/X-ray pulsar in wide circular orbit a la X Persei
Lutovinov et al. 2013 (Astr. Lett) :
  • Archival INTEGRAL and Chandra data analysis
  • Chandra position compatible with that of Swift (source quite off-axis in Chandra obs.)
  • Optical position is RA=22h 53m 55.130s dec=62°ree; 43' 36.90"
  • R magnitude is 13.0
  • A probable Be X-ray binary with a pulsar
Masetti et al. 2013 (A&A):
  • Optical / NIR observation + spectroscopy of counterpart
  • Confirm HMXB nature not a supergiant companion
  • Equivalent width of Hα => Porb > 100 days

Last updated 4 Sept. 2013

Jerome Rodriguez