2006MNRAS.369..305B


C.D.S. - SIMBAD4 rel 1.7 - 2021.04.15CEST08:05:43

2006MNRAS.369..305B - Mon. Not. R. Astron. Soc., 369, 305-310 (2006/June-2)

High-frequency quasi-periodic oscillations from GRS 1915+105 in its C state.

BELLONI T., SOLERI P., CASELLA P., MENDEZ M. and MIGLIARI S.

Abstract (from CDS):

We report the results of a systematic timing analysis of RXTE observations of GRS 1915+105 when the source was in its variability class θ, characterized by alternating soft and hard states on a time-scale of a few hundred seconds. The aim was to examine the high-frequency part of the power spectrum in order to confirm the hectohertz quasi-periodic oscillations (QPO) previously reported from observations from mixed variability behaviours. During the hard intervals (corresponding to state C in the classification of Belloni et al.), we find a significant QPO at a frequency of ∼170 Hz, although much broader (Q∼2) than previously reported. No other significant peak is observed at frequencies >30 Hz. A time-resolved spectral analysis of selected observations shows that the hard intervals from class θ show a stronger and steeper (Γ = 2.8-3.0) power-law component than hard intervals from other classes. We discuss these results in the framework of hectohertz QPOs reported from GRS 1915+105 and other black hole binaries.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): accretion, accretion discs - X-rays: binaries

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 V* V381 Nor HXB 15 50 58.6520652623 -56 28 35.309070422   17.95 16.6     K3III 1062 0
2 X Nor X-1 LXB 16 34 01.610 -47 23 34.80           ~ 438 0
3 [GHJ2008] 3 HXB 16 50 00.980 -49 57 43.60     11.89     K4V 358 0
4 V* V1033 Sco HXB 16 54 00.137 -39 50 44.90   15.20 14.2 16.14   F5IV 1751 1
5 V* V821 Ara HXB 17 02 49.3810714542 -48 47 23.163091737 16.20 16.30 15.5     ~ 1826 0
6 NAME XTE J17464-3213 LXB 17 46 15.59637 -32 14 00.8600           ~ 631 0
7 V* V406 Vul HXB 18 58 41.580 +22 39 29.40 15.00 15.65 15.31     G5V-K0V 326 0
8 Granat 1915+105 HXB 19 15 11.55576 +10 56 44.9052           ~ 2361 0

    Equat.    Gal    SGal    Ecl

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2021.04.15-08:05:43

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