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Infrared LC and spectrum of Scutum X-1 system
The symbiotic X-ray binary Sct X-1 was suggested to be the first known neutron star accreting from a red supergiant companion. Although known for nearly 50yr, detailed... -
NIR variability of Cyg X-3
We study near-infrared (JHK) and X-ray light curves of Cyg X-3 obtained with the 2.5m telescope of the Caucasian Mountain Observatory of MSU SAI and collected from the RXTE ASM... -
Average BVR light curve & RV of HD96670
We report on optical observations and modeling of HD96670, a single-line spectroscopic binary in the Carina OB2 association. We collected 10 epochs of optical spectroscopy, and... -
M83 X-ray binary classifications from HST
Building on recent work by Chandar+ (2020, J/ApJ/890/150), we construct X-ray luminosity functions (XLFs) for different classes of X-ray binary (XRB) donors in the nearby... -
Multiwavelength study for 4FGL J0336.0+7502
We report on the discovery of a promising candidate for a black widow (BW) millisecond pulsar binary, 4FGL J0336.0+7502, which shows many pulsar-like properties in the 4FGL-DR2... -
StrayCats: NuSTAR stray light obs.
We present StrayCats, a catalog of Nuclear Spectroscopic Telescope ARray (NuSTAR) stray light observations of X-ray sources. Stray light observations arise for sources... -
HMXB-dominant galaxy sample and properties
In this work, we present detailed constraints on the metallicity dependence of the high-mass X-ray binary (HMXB) X-ray luminosity function (XLF). We analyze ~5Ms of Chandra data... -
LIGO O2; gravitational waves from Scorpius X-1
We present the results of a search in LIGO O2 public data for continuous gravitational waves from the neutron star in the low-mass X-ray binary Scorpius X-1. We search for... -
X-Ray binary population in M31
We present our analysis of high-quality high-mass X-ray binary (HMXB) candidates in M31 selected from point-source optical counterpart candidates from the Chandra-PHAT survey... -
Swift/BAT and RXTE/ASM obs. of Hercules X-1
Swift/BAT and RXTE/ASM observations have monitored the X-ray binary system Her X-1 for approximately 14.5yr each, and both were monitoring Her X-1 for a period of ~5.5yr. Here... -
Swift/XRT and NICER timing study of MAXI J1820+070
We present a detailed timing analysis of the bright black hole X-ray binary MAXI J1820+070 (ASASSN-18ey), during its first detected outburst lasting from 2018 March until 2019... -
Deep Chandra survey of the SMC. III. HMXBs
We have compiled the most complete census of high-mass X-ray binaries (HMXBs) in the Small Magellanic Cloud with the aim to investigate the formation efficiency of young... -
Chandra multi-epoch study of the spiral gal. NGC7331
X-ray point sources in galaxies are dominated by X-ray binaries (XRBs) that are variables or transients, and whether their variability would alter the X-ray luminosity functions... -
BVI LCs and radial velocities of PSR J1306-40
PSR J1306-40 is a millisecond pulsar (MSP) binary with a non-degenerate companion in an unusually long ~1.097 day orbit. We present new optical photometry and spectroscopy of... -
24yr of radio observations of V404 Cygni
Relativistic outflows are believed to be a common feature of black hole X-ray binaries (BHXBs) at the lowest accretion rates, when they are in their "quiescent" spectral state.... -
IR spectroscopy of symbiotic stars. XII. V934 Her
The X-ray symbiotic (SyXB) V934 Her = 4U1700+24 is an M giant-neutron star (NS) binary system. Employing optical and infrared radial velocities spanning 29yr combined with the... -
Times of X-ray minima & orbit numbers of Cyg X-3
By using available archival X-ray data, we significantly extended the list of times of X-ray minima. The new list includes 65 data points obtained by critically reanalyzing RXTE... -
Opt/NIR obs. of 1FGLJ1417.7-4407 neutron star bin.
The Fermi {gamma}-ray source 1FGL J1417.7-4407 (J1417) is a compact X-ray binary with a neutron star primary and a red giant companion in a ~5.4 days orbit. This initial... -
X-ray stacking analysis of Chandra-COSMOS gal.
We present an X-ray stacking analysis of ~75000 star-forming galaxies between 0.1<z<5.0 using the Chandra COSMOS-Legacy survey to study the X-ray emission of... -
Optical LCs of the counterpart to IC 10 X-2
We present an optical and infrared (IR) study of IC 10 X-2, a high-mass X-ray binary in the galaxy IC 10. Previous optical and X-ray studies suggest that X-2 is a Supergiant...
