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The X-ray Bursts of XTE J1739-285: A NICER Sample

Authors :
Peter Bult
Diego Altamirano
Zaven Arzoumanian
Anna V. Bilous
Deepto Chakrabarty
Keith C Gendreau
Tolga Güver
Gaurava K. Jaisawal
Erik Kuulkers
Christian Malacaria
Mason Ng
Andrea Sanna
Tod E Strohmayer
Source :
Astrophysical Journal. 907(2)
Publication Year :
2021
Publisher :
United States: NASA Center for Aerospace Information (CASI), 2021.

Abstract

In this work, we report on observations with the Neutron Star Interior Composition Explorer of the known neutron star X-ray transient XTE J1739–285. We observed the source in 2020 February and March, finding it in a highly active bursting state. Across a 20 day period, we detected 32 thermonuclear X-ray bursts, with an average burst recurrence time of-+2.0 hr0.30.4. A timing and spectral analysis of the ensemble of X-ray bursts reveals homogeneous burst properties, evidence for short-recurrence time bursts, and the detection of a 386.5 Hz burst oscillation candidate. The latter is especially notable, given that a previous study of this source claimed a 1122 Hz burst oscillation candidate. We did not find any evidence of variability near 1122 Hz and instead find that the 386.5 Hz oscillation is the more prominent signal of the two burst oscillation candidates. Hence, we conclude it is unlikely that XTE J1739–285 has a submillisecond rotation period.

Subjects

Subjects :
Astronomy

Details

Language :
English
ISSN :
15384357 and 0004637X
Volume :
907
Issue :
2
Database :
NASA Technical Reports
Journal :
Astrophysical Journal
Notes :
80GSFC17M0002, , 273493
Publication Type :
Report
Accession number :
edsnas.20210013100
Document Type :
Report
Full Text :
https://doi.org/10.3847/1538-4357/abd54b