234 datasets found

Keywords: x ray binary stars

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  • 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...
  • 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...
  • 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...
  • 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...
  • SOAR opt. phot. & sp. in 4FGLJ0540.0-7552 field

    We report the discovery of a new low-mass X-ray binary near the center of the unassociated Fermi GeV {gamma}-ray source 4FGL J0540.0-7552. The source shows the persistent...
  • 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...
  • SFHs of GOODS z=0-3.5 gal. with X-ray em.

    The Chandra Deep Field-South and North surveys (CDFs) provide unique windows into the cosmic history of X-ray emission from normal (nonactive) galaxies. Scaling relations of...
  • 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...
  • 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...
  • A multiwavelength study of GRS 1716-249 in outburst

    We present a detailed study of the evolution of the Galactic black hole transient GRS 1716-249 during its 2016-2017 outburst at optical (Las Cumbres Observatory), mid-infrared...
  • 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...
  • Insight-HXMT high energy X-ray obs. of EXO1846-031

    We study the spectral evolution of the black hole candidate EXO1846-031 during its 2019 outburst, in the 1-150keV band, with the Hard X-ray Modulation Telescope. The continuum...
  • 0.4-10keV X-ray monitoring of Eta Car

    We report high-precision X-ray monitoring observations in the 0.4-10keV band of the luminous, long-period colliding wind binary Eta Carinae, up to and through its most recent...
  • StrayCats. II. Updated NuSTAR stray light obs.

    We present an updated catalog of StrayCats (a catalog of NuSTAR stray light observations of X-ray sources) that includes nearly 18 additional months of observations. StrayCats...
  • 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...
  • Calibrating X-ray binary LFs via opt. data. II. M81

    We characterize the optical counterparts to the compact X-ray source population within the nearby spiral galaxy M81 using multiband Hubble Space Telescope (HST) imaging data. By...
  • 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...
  • 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...
  • 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,...
  • 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...
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