20 citations · 62 across the 8 of their papers we have counts for
9 papers
Scaling Up: A Global Optical/X-ray Correlation For Reprocessing Across Black Hole Masses
Changhyun Cho, David M. Russell, Aaryan Sharma +9
This study extends the optical/X-ray correlation from black hole low-mass X-ray binaries (XRBs) to active galactic nuclei (AGN), bridging scales from stellar-mass to supermassive b…
Exotic optical variability in the black hole X-ray binary IGR J17091-3624
Payaswini Saikia, David M. Russell, D. M. Bramich +9
IGR J17091-3624 is a distinctive black hole X-ray binary exhibiting exotic variability, including complex "heartbeat" oscillations in its X-ray light curves, similar to those obser…
Evidence for enhanced mass transfer in the disc preceding the transition to the soft state in MAXI J1820+070
Pengcheng Yang, Guobao Zhang, David M. Russell +6
We investigate the 2018-2019 main outburst and the subsequent mini-outbursts of the black hole low-mass X-ray binary MAXI J1820+070 using optical/ultraviolet data from the Las Cumb…
Search for the Optical Counterpart of Einstein Probe Discovered Fast X-ray Transients from Lulin Observatory
Amar Aryan, Ting-Wan Chen, Sheng Yang +24
The launch of the Einstein Probe (EP) mission has revolutionized the detection and follow-up observations of fast X-ray transients (FXTs) by providing prompt and timely access to t…
The bright black hole X-ray binary 4U 1543-47 during 2021 outburst. A clear state transition from super-Eddington to sub-Eddington accretion revealed by Insight-HXMT
Pei Jin, Guobao Zhang, Yuexin Zhang +9
We present a detailed analysis of the observations with the Hard X-ray Modulation Telescope of the black hole X-ray transient 4U~1543-47 during its outburst in 2021. We find a clea…
Quiescent X-Ray/Optical Counterparts of the Black Hole Transient H 1705-250
Yi-Jung Yang, Albert K. H. Kong, David M. Russell +2
We report the result of a new Chandra observation of the black hole X-ray transient H 1705-250 in quiescence. H 1705-250 was barely detected in the new 50 ks Chandra observation. W…
The enigmatic black-hole candidate and X-ray transient IGR J17091-3624 in its quiescent state as seen with XMM-Newton
Rudy Wijnands, Yi Jung Yang, Diego Altamirano
We report on two short XMM-Newton observations performed in August 2006 and February 2007 during the quiescence state of the enigmatic black hole candidate system IGR J17091-3624.…
VLT/X-shooter spectroscopy of the candidate black-hole X-ray binary MAXI J1659-152 in outburst
Ramanpreet Kaur, Lex Kaper, Lucas E. Ellerbroek +15
We present the optical to near-infrared spectrum of MAXI J1659-152, during the onset of its 2010 X-ray outburst. The spectrum was obtained with X-shooter on the ESO - Very Large Te…
New observations of ULX supershells, and their implications
David M. Russell, Yi-Jung Yang, Jeanette C. Gladstone +2
New optical narrowband imaging observations of the fields of several ULXs are presented. Known supershell nebulae are associated with a number of these ULXs, which we detect in emi…