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Spectral analysis of the AMXP IGR J17591-2342 during its 2018 outburst
A. Manca, A. F. Gambino, A. Sanna +9
The Accreting Millisecond X-ray Pulsar IGR J17591-2342 is a LMXB system that went in outburst on August 2018 and it was monitored by the NICER observatory and partially by other fa…
The rise and fall of the iron-strong nuclear transient PS16dtm
T. Petrushevska, G. Leloudas, D. Ilic +30
Thanks to the advent of large-scale optical surveys, a diverse set of flares from the nuclear regions of galaxies has recently been discovered. These include the disruption of star…
The unaltered pulsar: GRO J1750-27, a super-critical X-ray neutron star that does not blink an eye
C. Malacaria, L. Ducci, M. Falanga +11
When accreting X-ray pulsars (XRPs) undergo bright X-ray outbursts, their luminosity-dependent spectral and timing features can be analysed in detail. The XRP GRO J1750-27 recently…
Optical and X-ray studies of Be/X-ray binary 1A 0535+262 during its 2020 giant outburst
Birendra Chhotaray, Gaurava K. Jaisawal, Neeraj Kumari +3
We report results obtained from the optical and X-ray studies of the Be/X-ray binary 1A 0535+262/HD 245770 during the 2020 October giant X-ray outburst, using the 1.2 m telescope a…
eRASSt J040515.6-745202, an X-ray burster in the Magellanic Bridge
F. Haberl, G. Vasilopoulos, C. Maitra +13
During the third all-sky survey (eRASS3), eROSITA, the soft X-ray instrument aboard Spectrum-Roentgen-Gamma, detected a new hard X-ray transient, eRASSt J040515.6-745202, in the di…
Magnetar spin-down glitch clearing the way for FRB-like bursts and a pulsed radio episode
G. Younes, M. G. Baring, A. K. Harding +16
Magnetars are a special subset of the isolated neutron star family, with X-ray and radio emission mainly powered by the decay of their immense magnetic fields. Many attributes of m…
The thermonuclear X-ray bursts of 4U 1730-22
Peter Bult, Giulio C. Mancuso, Tod E. Strohmayer +11
We present observations of the historic transient 4U 1730-22 as observed with the Neutron Star Interior Composition Explorer (NICER). After remaining in quiescence since its 1972 d…
MAXI J1957+032: a new accreting millisecond X-ray pulsar in an ultra-compact binary
A. Sanna, P. Bult, M. NG +12
The detection of coherent X-ray pulsations at ~314 Hz (3.2 ms) classifies MAXI J1957+032 as a fast-rotating, accreting neutron star. We present the temporal and spectral analysis p…
The discovery of the 528.6 Hz accreting millisecond X-ray pulsar MAXI J1816-195
Peter Bult, Diego Altamirano, Zaven Arzoumanian +15
We present the discovery of 528.6 Hz pulsations in the new X-ray transient MAXI J1816-195. Using NICER, we observed the first recorded transient outburst from the neutron star low-…
Burst-Disk Interaction in 4U 1636-536 as observed by NICER
Tolga Guver, Funda Bostanci, Tugba Boztepe +10
We present the detection of 51 thermonuclear X-ray bursts observed from 4U 1636-536 by the Neutron Star Interior Composition Explorer (NICER) over the course of a three year monito…
An X-ray view of the 2021 outburst of SXP 15.6: constraints on the binary orbit and magnetic field of the Neutron Star
G. Vasilopoulos, G. K. Jaisawal, C. Maitra +3
We conducted a spectral and temporal analysis of X-ray data from the Be X-ray binary pulsar SXP 15.6 located in the Small Magellanic Cloud based on NuSTAR, NICER and Swift observat…
Accreting on the edge: a luminosity-dependent cyclotron line in the Be/X-ray Binary 2S 1553-542 accompanied by accretion regimes transition
Christian Malacaria, Yash Bhargava, Joel B. Coley +15
Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the luminosity-dependent spectral and timing features of the neutron star's emission can be analyzed in…
AstroSat Observation of X-ray Dips and State Transition in the Black Hole Candidate MAXI J1803-298
Arghajit Jana, Sachindra Naik, Gaurava K. Jaisawal +3
We present the results obtained from broadband X-ray timing and spectral analysis of black hole candidate MAXI J1803-298 using an AstroSat observation on May 11-12, 2021. Four peri…