2025RNAAS...9..219C

Query : 2025RNAAS...9..219C

2025RNAAS...9..219C - Research Notes of the AAS, 9, 219 (2025/August-0)

A Comprehensive Energy-resolved Timing Analysis of XTE J1550-564.

CHUKKA S. and FUKUMURA K.

Abstract (from CDS):

We present a study of low-frequency quasi-periodic oscillations (LFQPOs) in the Galactic black hole binary XTE J1550-564 during its 1998 outburst using data from RXTE. Light curves in eight energy bands from 0.1 to 13 keV were analyzed with Fourier techniques to produce energy-resolved power spectra. Each spectrum was modeled with three Lorentzians along with a power-law continuum. From these fits, we measured the peak frequency (${\nu }_{{\rm{MAX}}}$), quality factor (Q), and fractional rms amplitude (r) for each QPO. Our results show that r increases with energy, indicating that QPOs become more detectable at higher energies, while Q and ${\nu }_{{\rm{MAX}}}$ remain largely unchanged. This suggests that the trend in r is not due to changes in the QPO's width or coherence, but rather to an increase in the continuum level with energy, which adds more power under the QPO features. These findings provide constraints for future modeling of LFQPO behavior.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Accretion - Black holes - Timing variation methods - X-ray transient sources - X-ray astronomy

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 V* V381 Nor HXB 15 50 58.6637920704 -56 28 35.258385000           K3III 1254 0

Query : 2025RNAAS...9..219C

Basic data :
V* V381 Nor -- High Mass X-ray Binary
Other object types: otypes_help 		X (2022MNRAS,XTE,...), gam (INTEGRAL1,INTREF), HXB (2016ApJS), V* (V*), * (Gaia)
ICRS coord. (ep=J2000) : 		15 50 58.6637920704 -56 28 35.258385000 (Optical) [ 1.4128 1.3058 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		15 47 00.3325468289 -56 19 32.660061348 [ 1.4128 1.3058 90 ]
Gal coord. (ep=J2000) : 		325.8823100401135 -01.8268509670613 [ 1.4128 1.3058 90 ]
Proper motions mas/yr : 		-6.490 -3.490 [1.957 1.738 90] A 2020yCat.1350....0G
Parallaxes (mas): 		2.347 [2.5819] A 2020yCat.1350....0G
Spectral type: 		K3III D ~
Fluxes (1) :
G 20.810112 [0.017124] C 2020yCat.1350....0G
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Identifiers (7) :
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INTEGRAL1 17 V* V381 Nor [KRL2007b] 174 Gaia DR3 5884099221246440064
INTREF 660 XTE J1550-564 Gaia DR2 5884099221246440064

References (1254 between 1850 and 2026) (Total 1254)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Distance : 1    Plx : 1    PM : 1   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

V* V381 Nor Gaia DR2 5884099221246440064 Gaia DR3 5884099221246440064

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