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NuSTAR and XMM-Newton observations of the Arches cluster in 2015: fading hard X-ray emission from the molecular cloud
Roman Krivonos, Maica Clavel, JaeSub Hong +6
We present results of long NuSTAR (200 ks) and XMM-Newton (100 ks) observations of the Arches stellar cluster, a source of bright thermal (kT~2 keV) X-rays with prominent Fe XXV K_…
Identifying four sources in the Galactic Plane via VLT/optical and -/X-ray spectroscopy
Farid Rahoui, John A. Tomsick, Roman Krivonos
We report on FORS2 spectroscopy aiming at the identification of four Galactic Plane sources discovered by , IGR J18088-2741, IGR J18381-0924, IGR J17164-3803, and IGR J19…
NuSTAR observations of the supergiant X-ray pulsar IGR J18027-2016: accretion from the stellar wind and possible cyclotron absorption line
A. Lutovinov, S. Tsygankov, K. Postnov +3
We report on the first focused hard X-ray view of the absorbed supergiant system IGRJ18027-2016 performed with the NuSTAR observatory. The pulsations are clearly detected with a pe…
(Almost) Closing the MSM Sterile Neutrino Dark Matter Window with NuSTAR
Kerstin Perez, Kenny C. Y. Ng, John F. Beacom +3
We use NuSTAR observations of the Galactic Center to search for X-ray lines from the radiative decay of sterile neutrino dark matter. Finding no evidence of unknown lines, we set l…
NuSTAR and XMM-Newton observations of the ultraluminous X-ray source NGC 5643 X-1
Roman Krivonos, Sergey Sazonov
We present a high-quality hard X-ray spectrum of the ultraluminous X-ray source (ULX) NGC 5643 X-1 measured with NuSTAR in May-June 2014. We have obtained this spectrum by carefull…
Propeller effect in the transient X-ray pulsar SMC X-2
A. Lutovinov, S. Tsygankov, R. Krivonos +2
We report the results of the monitoring campaign of the transient X-ray pulsar SMC X-2 performed with the Swift/XRT telescope over the period of 2015 September - 2016 January durin…