THE ORBITAL PERIOD OF SWIFT J1626.6-5156


BAYKAL A. , GÖĞÜŞ E., İNAM S. Ç. , Belloni T.

ASTROPHYSICAL JOURNAL, cilt.711, sa.2, ss.1306-1309, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 711 Konu: 2
  • Basım Tarihi: 2010
  • Doi Numarası: 10.1088/0004-637x/711/2/1306
  • Dergi Adı: ASTROPHYSICAL JOURNAL
  • Sayfa Sayıları: ss.1306-1309

Özet

We present the discovery of the orbital period of Swift J1626.6-5156. Since its discovery in 2005, the source has been monitored with Rossi X-Ray Timing Explorer, especially during the early stage of the outburst and into the X-ray modulating episode. Using a data span of similar to 700 days, we obtain the orbital period of the system as 132.9 days. We find that the orbit is close to a circular shape with an eccentricity 0.08, that is one of the smallest among Be/X-ray binary systems. Moreover, we find that the timescale of the X-ray modulations varied, which led to earlier suggestions of orbital periods at about a third and half of the orbital period of Swift J1626.6-5156.