Статья

The X-ray transient XTE J1859 + 226 in outburst and quiescence

C. ZuritaInstituto de Astrofisica de Canarias, 38200 La Laguna (Tenerife), SpainC. Sánchez‐FernándezLaboratorio de Astrofísica Espacial y Física Fundamental (LAEFF‐INTA), 28080 Madrid, SpainJ. CasaresInstituto de Astrofisica de Canarias, 38200 La Laguna (Tenerife), SpainP. A. CharlesDepartment of Physics and Astronomy, University of Southampton, Southampton SO17 1BJT. M. C. AbbottNordic Optical Telescope, 38700 Santa Cruz de La Palma, SpainPasi HakalaTuorla Observatory, Univ. of Turku (Finland)P. Rodríguez-GilInstituto de Astrofisica de Canarias, 38200 La Laguna (Tenerife), SpainS. BernabeiOsservatorio Astronomico di Bologna, Via Ranzani 1, Bologna, ItalyA. PiccioniDipartimento di Astronomia, Università di Bologna, via Ranzani 1, Bologna, ItalyА. ГуарниериUniversity of BolognaC. BartoliniDipartimento di Astronomia, Università di Bologna, via Ranzani 1, Bologna, ItalyN. MasettiT. ShahbazInstituto de Astrofisica de Canarias, 38200 La Laguna (Tenerife), SpainA. J. Castro‐TiradoInstituto de Astrofísica de Andalucía, 18080 Granada, SpainA. A. HendenUniversities Space Research Association/US Naval Observatory, Flagstaff Station, PO Box 1149, Flagstaff, AZ 86002, USA

2002en

ABI

Аннотация

We present optical photometry and spectroscopy of the X-ray transient XTE J1859+226, obtained during outburst and its subsequent decay to quiescence. Both the X-ray and optical properties are very similar to those of well-studied black hole soft X-ray transients. We have detected three mini-outbursts, when XTE J1859+226 was approaching quiescence, as has been previously detected in the soft X-ray transients GRO J0422+32 and GRS 1009–45. By 2000 August 24 the system had reached quiescence with <it>R</it>= 22.48 ± 0.07. The estimated distance to the source is ∼11 kpc. Photometry taken during quiescence shows a sinusoidal modulation with a peak to peak amplitude of about 0.4 mag. A period analysis suggests that periods from 0.28 to 0.47 d are equally possible at the 68 per cent confidence level. The amplitude of the quiescent light curve and the relatively low ratio of X-ray to optical flux indicate that the binary inclination should be high. The measured colours during the outburst allow us to obtain the basic properties of the disc, which agrees well with irradiated disc model predictions.

Перевод пока недоступен

Идентификаторы

DOI: 10.1046/j.1365-8711.2002.05588.x

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar