125 citations · 383 across the 18 of their papers we have counts for
18 papers
Spectral connection between far UV and soft X-ray emission from active galactic nuclei using AstroSat
Shrabani Kumar, G. C. Dewangan, K. P. Singh +5
We present the UV/X-ray joint spectral analyses of four Seyfert~1 galaxies (PG 0804+761, NGC 7469, SWIFT J1921.1-5842, and SWIFT J1835.0+3240) using the data acquired with the Ultr…
Accretion and Ejection Physics at High Time Resolution
F. M. Vincentelli, P. Casella, A. Veledina +18
Accretion onto compact objects is one of the most fundamental phenomena in the astrophysics, powering some of the most luminous objects in the sky. Along with this, accretion has a…
Infrared Synchrotron Emission in the Soft State of GX 339-4 and the Mid-Infrared/X-ray Luminosity Plane of Black Hole X-ray Binaries
P. Gandhi, D. M. Russell, M. C. Baglio +33
Progress in understanding the growth of accreting black holes remains hampered by a lack of sensitive coordinated multiwavelength observations. In particular, the mid-infrared (MIR…
Optical Counterparts to X-ray sources in LSST DP1
Yuankun, Wang, Eric C. Bellm +9
We present a crossmatch between a combined catalog of X-ray sources and the Vera C. Rubin Observatory Data Preview 1 (DP1) to identify optical counterparts. The six fields targeted…
The Mid-infrared Emitting Jet in the Black Hole V404 Cygni in Quiescence
E. S. Borowski, R. I. Hynes, Q. Hunt +13
Observations of some quiescent black hole X-ray binaries have revealed an excess of mid-infrared (MIR) emission above that expected from their donor stars. In one system, V404 Cygn…
The peculiar hard state behaviour of the black hole X-ray binary Swift J1727.81613
A. K. Hughes, F. Carotenuto, T. D. Russell +37
Tracking the correlation between radio and X-ray luminosities during black hole X-ray binary outbursts is a key diagnostic of the coupling between accretion inflows (traced by X-ra…
Sub-second optical/near-infrared quasi-periodic oscillations from the black hole X-ray transient Swift J1727.8-1613
F. M. Vincentelli, T. Shahbaz, P. Casella +14
We report on the detection of optical/near-infrared (O-IR) quasi-periodic oscillations (QPOs) from the black hole X-ray transient Swift J1727.8-1613. We obtained three X-ray and O-…
Calibrating the clock of JWST
A. W. Shaw, D. L. Kaplan, P. Gandhi +19
JWST, despite not being designed to observe astrophysical phenomena that vary on rapid time scales, can be an unparalleled tool for such studies. If timing systematics can be contr…
Rapid Mid-Infrared Spectral-Timing with JWST. I. The prototypical black hole X-ray Binary GRS 1915+105 during a MIR-bright and X-ray-obscured state
P. Gandhi, E. S. Borowski, J. Byrom +44
We present mid-infrared (MIR) spectral-timing measurements of the prototypical Galactic microquasar GRS 1915+105. The source was observed with the Mid-Infrared Instrument (MIRI) on…
New Compact Object Binary Populations with Precision Astrometry (Roman White Paper)
P. Gandhi, C. Dashwood Brown, Y. Zhao +6
Compact object binaries (a black hole or a neutron star orbiting a non-degenerate stellar companion) are key to our understanding of late massive star evolution, in addition to bei…
Astrometric excess noise in Gaia DR2 and the search for X-ray emitting binaries
Poshak Gandhi, David A. H. Buckley, Phil Charles +4
Astrometric noise in excess of parallax and proper motion could be a signature of orbital wobble of individual components in binary star systems. The combination of X-ray selection…
Physical constraints from near-infrared fast photometry of the black-hole transient GX 339-4
F. M. Vincentelli, P. Casella, P. Petrucci +9
We present results from the first multi-epoch X-ray/IR fast-photometry campaign on the black-hole transient GX 339--4, during its 2015 outburst decay. We studied the evolution of t…
Flares, wind and nebulae: the 2015 December mini-outburst of V404 Cygni
T. Muñoz-Darias, J. Casares, D. Mata Sánchez +22
After more than 26 years in quiescence, the black hole transient V404 Cyg went into a luminous outburst in June 2015, and additional activity was detected in late December of the s…
Disk-Jet quenching of the Galactic Black Hole Swift J1753.5-0127
A. P. Rushton, A. W. Shaw, R. P. Fender +8
We report on radio and X-ray monitoring observations of the BHC Swift J1753.5-0127 taken over a ~10 year period. Presented are daily radio observations at 15 GHz with the AMI-LA an…
Furiously Fast and Red: Sub-second Optical Flaring in V404 Cyg during the 2015 Outburst Peak
P. Gandhi, S. P. Littlefair, L. K. Hardy +25
We present observations of rapid (sub-second) optical flux variability in V404 Cyg during its 2015 June outburst. Simultaneous three-band observations with the ULTRACAM fast imager…
Serendipitous discovery of an extended X-ray jet without a radio counterpart in a high-redshift quasar
A. Simionescu, Ł. Stawarz, Y. Ichinohe +6
A recent Chandra observation of the nearby galaxy cluster Abell 585 has led to the discovery of an extended X-ray jet associated with the high-redshift background quasar B3 0727+40…
Internal shocks driven by accretion flow variability in the compact jet of the black hole binary GX 339-4
S. Drappeau, J. Malzac, J. Belmont +2
In recent years, compact jets have been playing a growing role in the understanding of accreting black hole engines. In the case of X-ray binary systems, compact jets are usually a…
Jet spectral breaks in black hole X-ray binaries
D. M. Russell, S. Markoff, P. Casella +10
In X-ray binaries, compact jets are known to commonly radiate at radio to infrared frequencies, whereas at optical to gamma-ray energies, the contribution of the jet is debated. Th…