2012A&A...542L..27P


Query : 2012A&A...542L..27P

2012A&A...542L..27P - Astronomy and Astrophysics, volume 542, L27-27 (2012/6-1)

A relativistic iron emission line from the neutron star low-mass X-ray binary GX 3+1.

PIRAINO S., SANTANGELO A., KAARET P., MUECK B., D'AI A., DI SALVO T., IARIA R., ROBBA N., BURDERI L. and EGRON E.

Abstract (from CDS):

We present the results of a spectroscopic study of the Fe Kα emission of the persistent neutron-star atoll low-mass X-ray binary and type I X-ray burster GX 3+1 with the EPIC-PN on board XMM-Newton. The source shows a flux modulation over several years and we observed it during its fainter phase, which corresponds to an X-ray luminosity of LX∼1037erg/s. When fitted with a two-component model, the X-ray spectrum shows broad residuals at ∼6-7keV that can be ascribed to an iron Kα fluorescence line. In addition, lower energy features are observed at ∼3.3keV, ∼3.9keV and might originate from Ar XVIII and Ca XIX. The broad iron line feature is well fitted with a relativistically smeared profile. This result is robust against possible systematics caused by instrumental pile-up effects. Assuming that the line is produced by reflection from the inner accretion disk, we infer an inner disk radius of ∼25Rg and a disk inclination of 35°<i<44°.

Abstract Copyright:

Journal keyword(s): line: identification - line: profiles - X-rays: individuals: GX 3+1 - X-rays: binaries - stars: neutron

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 4U 1705-44 LXB 17 08 54.470 -44 06 07.35           ~ 386 0
2 NAME Slow Burster LXB 17 31 57.73 -33 50 02.5     15.50     ~ 810 1
3 X Sgr X-1 LXB 17 47 56.0 -26 33 49           ~ 371 0

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2023.09.27-17:56:23

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