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AstroSat/UVIT and Chandra X-ray sources in M31
An ultraviolet (UV) survey of M31 has been carried out during 2017-19 with the Ultra-Violet Imaging Telescope (UVIT) instrument on board the AstroSat Observatory. Here we match... -
Chandra observations of SINGS galaxies
We present new Chandra constraints on the X-ray luminosity functions (XLFs) of X-ray binary (XRB) populations, as well as their scaling relations, for a sample of 38 nearby... -
Deep Chandra observations of NGC 4649. I.
We present the X-ray source catalog for the Chandra monitoring observations of the elliptical galaxy, NGC 4649 (M60). The galaxy has been observed with Chandra ACIS-S3 in six... -
7yr MAXI/GSC X-ray source cat. (3MAXI), |b|<10{deg}
We present the first MAXI/GSC X-ray source catalog in the low-Galactic-latitude sky |b|<10{deg} outside the Galactic center region (|b|<5{deg}, l<30{deg}, and... -
WATCHDOG: an all-sky database of Galactic BHXBs
With the advent of more sensitive all-sky instruments, the transient universe is being probed in greater depth than ever before. Taking advantage of available resources, we have... -
The Galactic Bulge Survey: X-ray observations
We introduce the Galactic Bulge Survey (GBS) and we provide the Chandra source list for the region that has been observed to date. Among the goals of the GBS are constraining... -
M33 Chandra ACIS survey: final catalog
This study presents the final source catalog of the Chandra ACIS Survey of M33 (ChASeM33). With a total exposure time of 1.4Ms, ChASeM33 covers ~70% of the D_25_ isophote... -
X-ray variability in NGC 6946, NGC 4485/90
We analyze data from five Chandra observations of the spiral galaxy NGC 6946 and from three Chandra observations of the irregular/spiral interacting galaxy pair NGC 4485/4490,... -
The X-ray binary population in M33. I
In this paper we present the source list for three Chandra observations of the Local Group galaxy M33. The observations are centered on the nucleus and on the star-forming... -
Ultraluminous X-ray sources in nearby galaxies
X-ray observations have revealed in other galaxies a class of extranuclear X-ray point sources with X-ray luminosities of 10^39^-10^41^ergs/s, exceeding the Eddington luminosity... -
Classification of Chandra sources
The rapid increase in serendipitous X-ray source detections requires the development of novel approaches to efficiently explore the nature of X-ray sources. If even a fraction... -
The redshift evolution of ULXs out to z~0.5
Ultraluminous X-ray sources (ULXs) are thought to be powerful X-ray binaries (XRBs) and may contribute significantly to the redshift-dependent X-ray emission from star-forming... -
Monitoring of the neutron star XRB Centaurus X-4
We report on a long-term optical monitoring of the neutron star X-ray binary Centaurus X-4 performed during the last 13.5yr. This source has been in quiescence since its... -
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...
