Chandra X-ray Observations of the Spiral Galaxy M81

Abstract

A Chandra X-Ray Observatory ACIS-S imaging observation is used to study the population of X-ray sources in the nearby Sab galaxy M81 (NGC 3031). A total of 177 sources are detected with 124 located within the D25 isophote to a limiting X-ray luminosity of 3e36 ergs/cm2/s. Source positions, count rates, luminosities in the 0.3-8.0 keV band, limiting optical magnitudes, and potential counterpart identifications are tabulated. Spectral and timing analysis of the 36 brightest sources are reported including the low-luminosity active galactic nucleus, SN 1993J, and the Einstein-discovered ultra-luminous X-ray source X6.

27 pages, 17 figures, 2 tables, submitted to ApJ

Cited by in corpus (82)

• Intermediate-Mass Black Holes
• Catalogue of high-mass X-ray binaries in the Galaxy ($4^{th}$ edition)
• Low mass X-ray binaries as a stellar mass indicator for the host galaxy
• X-ray source populations in galaxies
• The Ultra-Luminous X-ray Source Population from the Chandra Archive of Galaxies
• Radiatively Inefficient Accretion in Nearby Galaxies
• High-Mass X-ray Binaries in the Milky Way: A closer look with INTEGRAL
• Old and Young X-ray Point Source Populations in Nearby Galaxies
• Chandra Acis Survey of X-Ray Point Sources in 383 Nearby Galaxies I. the Source Catalog
• 2-10 keV luminosity of high-mass binaries as a gauge of ongoing star-formation rate
• Cosmological mass limits on neutrinos, axions, and other light particles
• Chandra X-Ray Observatory observations of the globular cluster M28 and its millisecond pulsar B1821-24
• The X-ray Halo Scaling Relations of Supermassive Black Holes
• The X-Ray Derived Cosmological Star Formation History and the Galaxy X-Ray Luminosity Functions in the Chandra Deep Fields North and South
• Reconstructing the primordial power spectrum - a new algorithm
• XMM-Newton Observations of Ultraluminous X-Ray Sources in Nearby Galaxies
• The optical counterpart of a Ultraluminous X-Ray Object in M81
• On the Possibility of Identification of a Short/Hard Burst GRB 051103 with the Giant Flare from a Soft Gamma Repeater in the M81 Group of Galaxies
• A census of X-ray nuclear activity in nearby galaxies
• Spatially Resolved Ultraviolet, H-alpha, Infrared, and Radio Star Formation in M81
• Properties of discrete X-ray sources in the starburst spiral galaxy M83
• Tracing the Mass-Dependent Star Formation History of Late-Type Galaxies using X-ray Emission: Results from the Chandra Deep Fields
• The ACS Nearby Galaxy Survey Treasury I. The Star Formation History of the M81 Outer Disk
• X-ray emission from radiative shocks in Type II supernovae
• Enhancement of Non-Gaussianity after Inflation
• Discovery of Nuclear X-ray Sources in SINGS Galaxies
• X-rays from the explosion site: Fifteen years of light curves of SN 1993J
• Distances to Galactic X-ray Binaries with Gaia DR2
• A Synoptic X-ray Study of M31 with the Chandra-HRC
• The Luminous X-ray Source Population in M51 Observed with Chandra
• Optical emission from massive donors in ULX binary systems
• Testing the Paradigm that Ultraluminous X-ray Sources as a Class Represent Accreting Intermediate-Mass Black Holes
• Long-term X-Ray Spectral Variability in AGN from the Palomar sample observed by Swift
• Long-term X-ray spectral evolution of Ultraluminous X-ray sources: implications on the accretion flow geometry and the nature of the accretor
• A new analysis of the short-duration, hard-spectrum GRB 051103, a possible extragalactic SGR giant flare
• Precise Localization of the Soft Gamma Repeater SGR 1627-41 and the Anomalous X-ray Pulsar AXP 1E1841-045 with Chandra
• X-ray emission from the Sombrero galaxy: a galactic-scale outflow
• Nature of the soft ULX in NGC 247: super-Eddington outflow and transition between the supersoft and soft ultraluminous regimes
• Large Highly-Ionized Nebulae Around Ultra-luminous X-ray Sources
• XMM-Newton observation of SN1993J in M81
• Modeling the X-ray emission of SN 1993J
• A multi-wavelength study of Supernova Remnants in six nearby galaxies. I: Detection of new X-ray selected Supernova Remnants with Chandra
• On the Nature of the Bright Short-Period X-ray Source in the Circinus Galaxy Field
• Detailed Atmosphere Model Fits to Disk-Dominated ULX Spectra
• Discovery of a Be/X-ray Binary Consistent with the Position of GRO J2058+42
• Luminosity Functions and Point Source Properties from Multiple Chandra Observations of M81
• Highly ionized Fe K emission lines from the LINER galaxy M 81
• A Chandra Observation of the Nearby Sculptor Group Sd Galaxy NGC 7793
• Diffuse X-ray-emitting Gas in Major Mergers
• A multi-wavelength search for a counterpart of the unidentified gamma-ray source 3EG J2020+4017 (2CG078+2)
• Chandra ACIS and Newton EPIC Observations of the X-ray Luminous SN1978K in NGC 1313
• Evolution of the progenitors of SNe 1993J and 2011dh revealed through late time radio and X-ray studies
• Optical and X-ray Properties of CAL 83: I. Quasi-periodic Optical and Supersoft Variability
• Massive black hole remnants of the first stars II: optical and X-ray signatures in present-day galactic haloes
• Black Holes and Neutron Stars in Nearby Galaxies: Insights from NuSTAR
• The Local Environment of Ultraluminous X-ray Sources Viewed by XMM Newton's Optical Monitor
• The Origin and Distribution of Diffuse Hot Gas in the Spiral Galaxy NGC 3184
• Long-term X-ray Variability of Ultraluminous X-ray Sources
• A Very Large Array Search for Intermediate-Mass Black Holes in Globular Clusters in M81
• On the nature of the brightest globular cluster in M81
• A Multi-wavelength Study of the X-ray Sources in NGC 5018
• Long term X-ray spectral variability of the nucleus of M81
• Red Supergiants in the Disk of M81: Tracing the Spatial Distribution of Star Formation 25 Million Years in the Past
• XMM-Newton observations of the interacting galaxy pairs NGC7771/0 and NGC2342/1
• Joining radio with X-rays: A revised model for SN 1993J
• A Stacked Search for Intermediate-Mass Black Holes in 337 Extragalactic Star Clusters
• The Stellar Disk of M81
• A search for stellar X-ray sourcesin the Sagittarius and Carina dwarf galaxies - I: X-ray observations
• On minor black holes in galactic nuclei
• XMM-Newton Observations of the Field of Gamma-Ray Burst 980425
• Broadband X-ray Spectral Study of Ultra-luminous X-ray Source M81 X--6
• Multiwavelength study of the bright X-ray source population in the interacting galaxies NGC5774/NGC5775
• The Lack of Halo Ultraluminous X-ray Sources
• A New Ultraluminous X-ray Source in the Nearby Edge-on Spiral NGC 891
• The ultraluminous X-ray source M81 X-6: a weakly magnetised neutron star with a precessing accretion disc?
• XMM-Newton Observations of Luminous Sources in the Nearby Galaxies: NGC 4395, NGC 4736, and NGC 4258
• A Multi-epoch X-ray Study of the Spiral Galaxy NGC 7331
• High-redshift X-ray properties of the haloes of simulated disc galaxies
• Exploring the Spectral Variability of the Ultra-luminous X-ray source M81 X-6 with Suzaku and XMM-Newton
• Modeling the Radio and X-ray Emission of SN 1993J and SN 2002ap
• The First Chandra Field
• The X-ray variation of M81* resolved by Chandra and NuSTAR