The Chandra Local Volume Survey I: The X-ray Point Source Populations of NGC 55, NGC 2403, and NGC 4214

Abstract

We present comprehensive X-ray point source catalogs of NGC~55, NGC~2403, and NGC~4214 as part of the Chandra Local Volume Survey. The combined archival observations have effective exposure times of 56.5 ks, 190 ks, and 79 ks for NGC~55, NGC~2403, and NGC~4214, respectively. When combined with our published catalogs for NGC 300 and NGC 404, our survey contains 629 X-ray sources total down to a limiting unabsorbed luminosity of $\sim 5\times 10^{35}$ erg s${}^{-1}$ in the 0.35-8 keV band in each of the five galaxies. We present X-ray hardness ratios, spectral analysis, radial source distributions, and an analysis of the temporal variability for the X-ray sources detected at high significance. To constrain the nature of each X-ray source, we carried out cross-correlations with multi-wavelength data sets. We searched overlapping Hubble Space Telescope observations for optical counterparts to our X-ray detections to provide preliminary classifications for each X-ray source as a likely X-ray binary, background AGN, supernova remnant, or foreground star.

Accepted to AJ; 38 pages, 20 tables, 15 figures

References in corpus (28)

• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• The ACS Nearby Galaxy Survey Treasury
• Metallicity Effects on Dust Properties in Starbursting Galaxies
• XMM-Newton observations of the brightest Ultraluminous X-ray sources
• The XMM-Newton wide-field survey in the COSMOS field. The point-like X-ray source catalogue
• Extragalactic chemical abundances: do HII regions and young stars tell the same story? The case of the spiral galaxy NGC 300
• Specific SFR profiles in nearby spiral galaxies: quantifying the inside-out formation of disks
• A new method for determining the sensitivity of X-ray imaging observations and the X-ray number counts
• Chi-square and Poissonian Data: Biases Even in the High-Count Regime and How to Avoid them
• A Chandra Search for Coronal X Rays from the Cool White Dwarf GD 356
• New Radial Abundance Gradients for NGC 628 and NGC 2403
• M-type giants as optical counterparts of X-ray sources 4U 1700+24 and 4U 1954+319
• The first year of SN 2004dj in NGC 2403
• Models for Low-Mass X-Ray Binaries in the Elliptical Galaxies NGC3379 and NGC4278: Comparison with Observations
• X-Ray-Emitting Stars Identified from the ROSAT All-Sky Survey and the Sloan Digital Sky Survey
• Chandra ACIS Survey of M33 (ChASeM33): A First Look
• The young stellar population of NGC 4214 as observed with HST. II. Results
• The Chandra Small Magellanic Cloud Wing Survey - the search for X-ray Binaries
• High Mass X-ray Binaries and Recent Star Formation History of the Small Magellanic Cloud
• ChaMPlane Deep Galactic Bulge Survey. I. Faint accretion-driven binaries in the Limiting Window
• X-Ray emission from SN 2004dj: A Tale of Two Shocks
• The young stellar population of NGC 4214 as observed with HST. I. Data and methods
• Clues on the rejuvenation of the S0 galaxy NGC 404 from the chemical abundance of its outer disk
• The X-ray properties of the dwarf Magellanic-type galaxy NGC 55
• The Chandra ACIS Survey of M33 (ChASeM33): Transient X-ray Sources Discovered in M33
• Discovery of a 3.6-hr Eclipsing Luminous X-Ray Binary in the Galaxy NGC 4214
• VLT/FORS2 observations of four high-luminosity ULX candidates
• CXOU J121538.2+361921 in the galaxy NGC 4214: a double neutron star in the making?

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• The X-ray Binary Population of the Nearby Dwarf Starburst Galaxy IC 10: Variable and Transient X-ray Sources
• Transient X-ray source population in the Magellanic-type galaxy NGC 55
• The Supernova Remnant Populations of the galaxies NGC 45, NGC 55, NGC 1313, NGC 7793: Luminosity and Excitation Functions
• Blue Supergiant X-ray Binaries in the Nearby Dwarf Galaxy IC 10
• NGC 2403 XMM4: evidence for a super-Eddington neutron star with a possible transient pulsation
• Monitoring the X-ray Variability of Bright X-ray Sources in M33
• Spectral study of X-ray sources in some galaxies recently observed by Chandra
• Classification of a New X-ray Catalog of Likely Counterparts to 4FGL-DR4 Unassociated Gamma-ray Sources Using a Neural Network