TY - JOUR
T1 - The X-Ray Bursts of XTE J1739–285: A NICER Sample
AU - Bult, Peter
AU - Altamirano, Diego
AU - Arzoumanian, Zaven
AU - Bilous, Anna V.
AU - Chakrabarty, Deepto
AU - Gendreau, Keith C.
AU - Güver, Tolga
AU - Jaisawal, Gaurava K.
AU - Kuulkers, Erik
AU - Malacaria, Christian
AU - Ng, Mason
AU - Sanna, Andrea
AU - Strohmayer, Tod E.
PY - 2021
Y1 - 2021
N2 - 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 .
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.
AB - 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 .
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.
U2 - 10.3847/1538-4357/abd54b
DO - 10.3847/1538-4357/abd54b
M3 - Journal article
SN - 0067-0049
VL - 907
JO - Astrophysical Journal Supplement Series
JF - Astrophysical Journal Supplement Series
IS - 2
M1 - 79
ER -