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The X-ray bursts of XTE J1739–285: a NICER sample

The X-ray bursts of XTE J1739–285: a NICER sample
The X-ray bursts of XTE J1739–285: a NICER sample
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 ${2.0}_{-0.3}^{+0.4}\,\mathrm{hr}$. 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.
0004-637X
1-12
Bult, Peter
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Altamirano, Diego
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Arzoumanian, Zaven
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Bilous, Anna V.
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Chakrabarty, Deepto
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Gendreau, Keith C.
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Güver, Tolga
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Jaisawal, Gaurava K.
4d5dcd39-0881-426d-8ad7-f378238405ae
Kuulkers, Erik
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Malacaria, Christian
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Ng, Mason
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Sanna, Andrea
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Strohmayer, Tod E.
e1a6de84-d23d-43de-b33e-2d49c4a5daa7
Bult, Peter
73bd0a3d-c566-4046-86c9-31f6e6cdac07
Altamirano, Diego
d5ccdb09-0b71-4303-9538-05b467be075b
Arzoumanian, Zaven
148a8b48-2b12-4744-b32b-08da259503ba
Bilous, Anna V.
74a81349-b33b-4ca5-b148-8d3791a16f97
Chakrabarty, Deepto
2fbe9d21-20d7-4db8-a75c-92b0ed8b30a4
Gendreau, Keith C.
289c5283-377f-476a-aec3-5532dfff6f2b
Güver, Tolga
964ab35f-1906-4711-a39c-12a4a44aec7d
Jaisawal, Gaurava K.
4d5dcd39-0881-426d-8ad7-f378238405ae
Kuulkers, Erik
831cc871-2b1a-4d24-b72e-ca12b6ff2788
Malacaria, Christian
309a8f91-28a7-4365-b0a3-633171fc2e51
Ng, Mason
1ea126a4-d65f-4ea4-a97b-dd8620d745e4
Sanna, Andrea
2c05dccc-d674-4ca7-b324-730eb73d6a36
Strohmayer, Tod E.
e1a6de84-d23d-43de-b33e-2d49c4a5daa7

Bult, Peter, Altamirano, Diego, Arzoumanian, Zaven, Bilous, Anna V., Chakrabarty, Deepto, Gendreau, Keith C., Güver, Tolga, Jaisawal, Gaurava K., Kuulkers, Erik, Malacaria, Christian, Ng, Mason, Sanna, Andrea and Strohmayer, Tod E. (2021) The X-ray bursts of XTE J1739–285: a NICER sample. The Astrophysical Journal, 907 (2), 1-12, [79]. (doi:10.3847/1538-4357/abd54b).

Record type: Article

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 ${2.0}_{-0.3}^{+0.4}\,\mathrm{hr}$. 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.

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The X-Ray Bursts of XTE J1739-285 A NICER Sample - Accepted Manuscript
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More information

Accepted/In Press date: 17 December 2020
Published date: 1 February 2021
Additional Information: ARXIV IS AM

Identifiers

Local EPrints ID: 447831
URI: http://eprints.soton.ac.uk/id/eprint/447831
ISSN: 0004-637X
PURE UUID: 6806dc99-5c15-4a5a-a490-7c008b0e7d46
ORCID for Diego Altamirano: ORCID iD orcid.org/0000-0002-3422-0074

Catalogue record

Date deposited: 23 Mar 2021 17:40
Last modified: 24 Mar 2021 02:44

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Contributors

Author: Peter Bult
Author: Zaven Arzoumanian
Author: Anna V. Bilous
Author: Deepto Chakrabarty
Author: Keith C. Gendreau
Author: Tolga Güver
Author: Gaurava K. Jaisawal
Author: Erik Kuulkers
Author: Christian Malacaria
Author: Mason Ng
Author: Andrea Sanna
Author: Tod E. Strohmayer

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