2004A&A...426..587C


C.D.S. - SIMBAD4 rel 1.7 - 2020.02.28CET14:31:47

2004A&A...426..587C - Astronomy and Astrophysics, volume 426, 587-600 (2004/11-1)

A study of the low-frequency quasi-periodic oscillations in the X-ray light curves of the black hole candidate XTE J1859+226.

CASELLA P., BELLONI T., HOMAN J. and STELLA L.

Abstract (from CDS):

We present the results of an extensive timing analysis of the 1999 outburst of the soft X-ray transient and black hole candidate XTE J1859+226 as observed with the Rossi X-Ray Timing Explorer. Three main different types of low frequency (1-9Hz) quasi-periodic oscillations (QPOs) were observed and classified, strengthening the general picture that is emerging for the variability properties of black hole X-ray binaires. Rapid transitions between different power spectral shapes were observed and their link with the count rate was studied. Furthermore, we show that a frequency of ∼6Hz seems to hold a particular place: one of the three QPO types we found was very stable when at this frequency, as it happens in Z sources as well. The coherence of its subharmonic peak was higher when the fundamental was close to 6Hz, thus suggesting the presence of some resonance at this frequency.

Abstract Copyright:

Journal keyword(s): X-rays: binaries - stars: individual: XTE J1859+226

Simbad objects: 7

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Number of rows : 7

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* GU Mus HXB 11 26 26.5947467816 -68 40 32.888148788   13.60 13.3     K3V-K7V 669 1
2 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1006 0
3 X Nor X-1 LXB 16 34 01.610 -47 23 34.80           ~ 412 0
4 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1727 0
5 V* V2606 Oph NL* 17 42 40.030 -27 44 52.70     23.2     ~ 112 0
6 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 314 0
7 Granat 1915+105 LXB 19 15 11.54938 +10 56 44.7585           ~ 2252 0

    Equat.    Gal    SGal    Ecl

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2020.02.28-14:31:47

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