2022A&A...661A..33M


Query : 2022A&A...661A..33M

2022A&A...661A..33M - Astronomy and Astrophysics, volume 661A, 33-33 (2022/5-1)

Losing a minute every two years: SRG X-ray view of the rapidly accelerating X-ray pulsar SXP 1323.

MEREMINSKIY I.A., MUSHTUKOV A.A., LUTOVINOV A.A., TSYGANKOV S.S., SEMENA A.N., MOLKOV S.V. and SHTYKOVSKY A.E.

Abstract (from CDS):

The source SXP 1323 is a peculiar high-mass X-ray binary located in the Small Magellanic Cloud. It is renowned for its rapid spin-up. We investigate for the first time broadband X-ray properties of SXP 1323 as observed by the Mikhail Pavlinsky ART-XC and eROSITA telescopes on board the Spectrum-Roentgen-Gamma observatory. Using ART-XC and eROSITA data, we produced a first broadband 1-20 keV X-ray spectrum and estimated the pulsed fraction box 8 keV. With the addition of archival XMM-Newton observations, we traced the evolution of the spin period of SXP 1323 over the last five years and found that after 2016, the source switched to a linear spin-up with a rate of -29.9 s yr–1. The broadband X-ray spectrum is typical for accreting X-ray pulsars. It has a steep power-law index (Γ = -0.15) and an exponential cutoff energy of 5.1 keV. No significant difference between spectra obtained in states with and without pulsations were found.

Abstract Copyright: © ESO 2022

Journal keyword(s): X-rays: binaries - accretion, accretion disks - magnetic fields - X-rays: individuals: SXP1323 - stars: neutron - pulsars: general

Simbad objects: 6

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Number of rows : 6
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 10314 1
2 NAME NGC 300 2010da s*b 00 55 04.86 -37 41 43.7           LBV 144 0
3 [MA93] 1393 HXB 01 03 37.5349856136 -72 01 33.204096336   14.54 14.65     B0III-V 64 0
4 SNR B0102-72.3 SNR 01 04 01.2 -72 01 52           ~ 375 1
5 SXP 1062 HXB 01 27 45.9424650912 -73 32 56.376382920   14.32 14.36     B0.5(III)e 70 1
6 1RXP J130159.6-635806 Psr 13 01 58.7205396744 -63 58 08.828687136           O9V/B1III 54 0

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2022.08.09-15:18:43

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