579 citations · 833 across the 28 of their papers we have counts for
23 papers · 1 filter
A Broadband X-ray Analysis and Optical Counterpart Search of IC5052 ULX
Nabil Brice, Dominic J. Walton, Felix Fürst +10
We present broadband X-ray spectral and timing analysis of the Ultra-luminous X-ray source (ULX) in IC5052 using simultaneous XMM-Newton and NuSTAR observations from 2022, suppleme…
Return to the forgotten ULX: a broadband NICER+NuSTAR study of NGC 4190 ULX-1
Hannah P Earnshaw, Matteo Bachetti, Murray Brightman +7
We observed the nearby and relatively understudied ultraluminous X-ray source (ULX) NGC 4190 ULX-1 jointly with NICER and NuSTAR to investigate its broadband spectrum, timing prope…
X-ray and Radio Monitoring of the Neutron Star Low Mass X-ray Binary 1A 1744-361: Quasi Periodic Oscillations, Transient Ejections, and a Disk Atmosphere
Mason Ng, Andrew K. Hughes, Jeroen Homan +19
We report on X-ray (NICER/NuSTAR/MAXI/Swift) and radio (MeerKAT) timing and spectroscopic analysis from a three-month monitoring campaign in 2022 of a high-intensity outburst of th…
Simultaneous NICER and NuSTAR Observations of the Ultra-compact X-ray Binary 4U 0614+091
David Moutard, Renee Ludlam, Javier A. García +13
We present the first joint NuSTAR and NICER observations of the ultra-compact X-ray binary (UCXB) 4U 0614+091. This source shows quasi-periodic flux variations on the timescale of…
The cosipy library: COSI's high-level analysis software
Israel Martinez-Castellanos, Savitri Gallego, Chien-You Huang +72
The Compton Spectrometer and Imager (COSI) is a selected Small Explorer (SMEX) mission launching in 2027. It consists of a large field-of-view Compton telescope that will probe wit…
Accretion spin-up and a strong magnetic field in the slow-spinning Be X-ray binary MAXI J0655-013
Sean N. Pike, Mutsumi Sugizaki, Jakob van den Eijnden +8
We present MAXI and NuSTAR observations of the Be X-ray binary, MAXI J0655-013, in outburst. NuSTAR observed the source once early in the outburst, when spectral analysis yields a…
Revealing the spectral state transition of the Clocked Burster, GS 1826-238 with NuSTAR StrayCats
S. B. Yun, B. W. Grefenstette, R. M. Ludlam +4
We present the long term analysis of GS 1826-238, a neutron star X-ray binary known as the "Clocked Burster", using data from NuSTAR StrayCats. StrayCats, a catalogue of NuSTAR str…
Discovery of a new supergiant fast X-ray transient MAXI J0709-159 associated with the Be star LY CMa
Mutsumi Sugizaki, Tatehiro Mihara, Kohei Kobayashi +10
We report on the discovery of a new supergiant fast X-ray transient (SFXT), MAXI J0709159, and its identification with LY CMa (also known as HD 54786). On 2022 January 25, a new…
MAXI and NuSTAR observations of the faint X-ray transient MAXI J1848-015 in the GLIMPSE-C01 Cluster
Sean N. Pike, Hitoshi Negoro, John A. Tomsick +14
We present the results of MAXI monitoring and two NuSTAR observations of the recently discovered faint X-ray transient MAXI J1848-015. Analysis of the MAXI light-curve shows that t…
Orbital decay in M82 X-2
Matteo Bachetti, Marianne Heida, Thomas Maccarone +21
M82 X-2 is the first pulsating ultraluminous X-ray source (PULX) discovered. The luminosity of these extreme pulsars, if isotropic, implies an extreme mass transfer rate. An altern…
Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX7
Murray Brightman, Matteo Bachetti, Hannah Earnshaw +6
M51 ULX7 is among a small group of known ultraluminous X-ray pulsars (ULXP). The neutron star powering the source has a spin period of 2.8s, orbits its companion star with a period…
Spectral and Timing Analysis of NuSTAR and Swift/XRT Observations of the X-Ray Transient MAXI J0637-430
Hadar Lazar, John A. Tomsick, Sean N. Pike +10
We present results for the first observed outburst from the transient X-ray binary source MAXI J0637-430. This study is based on eight observations from the Nuclear Spectroscopic T…
Photospheric Radius Expansion and a double-peaked type-I X-ray burst from GRS 1741.9-2853
Sean N. Pike, Fiona A. Harrison, John A. Tomsick +6
We present analysis of two type-I X-ray bursts observed by NuSTAR originating from the very faint transient neutron star low-mass X-ray binary GRS 1741.9-2853 during a period of ou…
A Comprehensive X-ray Report on AT2019wey
Yuhan Yao, S. R. Kulkarni, K. C. Gendreau +25
Here, we present MAXI, SWIFT, NICER, NuSTAR and Chandra observations of the X-ray transient AT2019wey (SRGA J043520.9+552226, SRGE J043523.3+552234). From spectral and timing analy…
A New Transient Ultraluminous X-ray Source in NGC 7090
D. J. Walton, M. Heida, M. Bachetti +17
We report on the discovery of a new, transient ultraluminous X-ray source (ULX) in the galaxy NGC 7090. This new ULX, which we refer to as NGC 7090 ULX3, was discovered via monitor…
Swift monitoring of M51: A 38-day super-orbital period for the pulsar ULX7 and a new transient ULX
Murray Brightman, Hannah Earnshaw, Felix Fürst +6
We present the results from a monitoring campaign made with the Neil Gehrels Swift Observatory of the M51 galaxies, which contain several variable ultraluminous X-ray sources (ULXs…
A broadband look at the old and new ULXs of NGC 6946
Hannah P. Earnshaw, Brian W. Grefenstette, Murray Brightman +8
Two recent observations of the nearby galaxy NGC 6946 with NuSTAR, one simultaneous with an XMM-Newton observation, provide an opportunity to examine its population of bright accre…
Observing the transient pulsations of SMC X-1 with NuSTAR
Sean N. Pike, Fiona A. Harrison, Matteo Bachetti +6
We report on NuSTAR observations of transient pulsations in the neutron star X-ray binary SMC X-1. The transition from non-pulsing to pulsing states was not accompanied by a large…
Discovery of pulsation dropout and turn-on during the high state of the accreting X-ray pulsar LMC X-4
McKinley C. Brumback, Ryan C. Hickox, Matteo Bachetti +6
Two \textit{NuSTAR} observations of the luminous X-ray pulsar LMC X-4 in October and November 2015 captured several bright accretion flares from this source, which has a long histo…
Swift and NuSTAR observations of GW170817: detection of a blue kilonova
P. A. Evans, S. B. Cenko, J. A. Kennea +56
With the first direct detection of merging black holes in 2015, the era of gravitational wave (GW) astrophysics began. A complete picture of compact object mergers, however, requir…
A Soft X-Ray Lag Detected in Centaurus A
Yutaro Tachibana, Taiki Kawamuro, Yoshihiro Ueda +7
We performed time lag analysis on the X-ray light curves of Centaurus A (Cen A) obtained by the Gas Slit Camera (GSC) aboard the Monitor of All-sky X-ray Image ({\it MAXI}) in thre…
A Correlation Between Optical, X-ray, and Gamma-ray Variations in Blazar 3C 454.3
Yutaro Tachibana, Nobuyuki Kawai, Sean Pike
We present the light curve data of a remarkable blazer 3C 454.3 (z=0.859) in optical, X-ray, and gamma-ray bands. Since January 2008, we have been monitoring this object using the…
Multi-wavelength observations of the black widow pulsar 2FGL J2339.6-0532 with OISTER and Suzaku
Yoichi Yatsu, Jun Kataoka, Yosuke Takahashi +41
Multi-wavelength observations of the black-widow binary system 2FGL J2339.6-0532 are reported. The Fermi gamma-ray source 2FGL J2339.6-0532 was recently categorized as a black wido…