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Monitoring Observations of SMC X-1's Excursions (MOOSE) I: Program Description and Initial High-State Spectral Results
Kristen C. Dage, McKinley Brumback, Joey Neilsen +8
SMC X-1 has exhibited three super-orbital period excursions since the onset of X-ray monitoring beginning with RXTE's launch in 1995. NICER has recently probed a fourth observed ex…
A persistent ultraviolet outflow from an accreting neutron star binary transient
N. Castro Segura, C. Knigge, K. S. Long +31
All disc-accreting astrophysical objects produce powerful outflows. In binaries containing neutron stars (NS) or black holes, accretion often takes place during violent outbursts.…
A Decade of Black-Hole X-ray Binary Transients
Philip A Charles, David A H Buckley, Enrico Kotze +7
The last decade has seen a significant gain in both space and ground-based monitoring capabilities, producing vastly better coverage of BH X-ray binaries during their (rare) transi…
Astrometric excess noise in Gaia EDR3 and the search for X-ray binaries
P. Gandhi, D. A. H. Buckley, P. A. Charles +6
Astrometric noise (AEN) in excess of parallax and proper motion is a potential signature of orbital wobble of individual components in binary star systems. The combination of X-ray…
Synchronous X-ray/Optical QPOs from the Black Hole LMXB MAXI J1820+070
Jessymol K. Thomas, David A. H. Buckley, Philip A. Charles +10
We present high-speed optical photometry from SAAO and SALT on the black hole LMXB \MAXI (ASSASN-18ey), some of it simultaneous with NICER, Swift and Insight-HXMT X-ray coverage. W…
Large optical modulations during 2018 outburst of MAXI J1820+070 reveal evolution of warped accretion disc through X-ray state change
Jessymol K. Thomas, Philip A. Charles, David A. H. Buckley +5
The black-hole X-ray transient MAXI J1820+07 (=ASSASN-18ey) discovered in March 2018 was one of the optically brightest ever seen, which has resulted in very detailed optical outbu…