2025MNRAS.539.3437C


Query : 2025MNRAS.539.3437C

2025MNRAS.539.3437C - Mon. Not. R. Astron. Soc., 539, 3437-3444 (2025/June-1)

Broad-band study of the SMC pulsar RX J0032.9-7348 during its X-ray brightening in 2024.

CHHOTARAY B., JAISAWAL G.K., NAIK S. and JANA A.

Abstract (from CDS):

We present the results of the broadband timing and spectral analysis of the poorly understood SMC pulsar RX J0032.9-7348 (=SXP 7.02) using NuSTAR and NICER observations during its X-ray brightening in 2024. Our timing analysis revealed a pulsation period of approximately 7.02 s in the X-ray light curve. The pulse profile obtained in the broad energy range is double-peaked and asymmetric in nature and shows moderate variation with the energy. An absorbed power-law model describes the 0.5-8 keV NICER spectra well. The 3-50 keV NuSTAR spectrum is best described with an absorbed power-law modified with a high-energy cutoff model. We find no evidence of iron or cyclotron line features in the energy spectrum. During our observation period, the 0.5-50 keV luminosity varies in the range of $\sim 8\times 10^{36}\!-\!\times 10^{37}$ erg s$^{-1}$. We also discuss the dependence of spectral parameters on the rotational phase of the pulsar through phase-resolved spectroscopy.

Abstract Copyright: © 2025 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.

Journal keyword(s): pulsars: individual: RX J0032.9-7348 - X-rays: binaries

Simbad objects: 10

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Number of rows : 10
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 RX J0032.9-7348 HXB 00 32 56.1 -73 48 19           ~ 15 0
2 LIN 198 HXB 00 52 05.6251611744 -72 26 04.228773036 13.86 14.91 14.927 14.91 14.794 B0-5(II)e 187 0
3 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 12317 1
4 X SMC X-2 HXB 00 54 33.43 -73 41 01.3 13.77 16.40 16.38   14.67 O9.5III-V 143 0
5 AzV 503 HXB 01 21 40.6223488848 -72 57 30.906717444   14.23 14.3     B0-5(II)e 48 0
6 RX J0209.6-7427 HXB 02 09 34.5371983752 -74 27 11.819042136     14.45     Be 64 0
7 V* BQ Cam HXB 03 34 59.9116110096 +53 10 23.296879776   17.16 15.42 14.26 13.04 O8.5Ve 525 1
8 HD 245770 HXB 05 38 54.5748918624 +26 18 56.836952784 9.30 9.84 9.39 8.77 8.30 O9/B0III/Ve 1045 0
9 V* V850 Cen HXB 13 01 17.0968941216 -61 36 06.637549788   15.6 14.40     B2Vne 361 0
10 V* V2246 Cyg HXB 20 32 15.2749858128 +37 38 14.843024844   22.16 19.41 17.32 15.18 B0Ve 480 0

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