The Chandra local volume survey. I. The X-ray point source populations of NGC 55, NGC 2403, and NGC 4214

Journal Article · Tue Sep 01 04:00:00 EDT 2015 · The Astronomical Journal (Online)

DOI:https://doi.org/10.1088/0004-6256/150/3/94· OSTI ID:22890196

Binder, B.; Williams, B. F.; Anderson, S. F.; Dalcanton, J. J.; Weisz, D. R. ^[1]; Eracleous, M. ^[2]; Plucinsky, P. P.; Gaetz, T. J. ^[3]; Skillman, E. D. ^[4]; Kong, A. K. H. ^[5]

---

1. University of Washington, Department of Astronomy, Box 351580, Seattle, WA 98195 (United States)
2. Department of Astronomy and Astrophysics and Center for Gravitational Wave Physics, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States)
3. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
4. University of Minnesota, Astronomy Department, 116 Church St. SE, Minneapolis, MN 55455 (United States)
5. Institute of Astronomy and Department of Physics, National Tsing Hua University, Hsinchu 30013, Taiwan (China)

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 ∼5×10{sup 35} erg s{sup −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 active galactic nucleus, supernova remnant, or foreground star.

• OSTI ID: 22890196
• Journal Information: The Astronomical Journal (Online), Journal Name: The Astronomical Journal (Online) Journal Issue: 3 Vol. 150; ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
CATALOGS
CLASSIFICATION
DISTRIBUTION
GALAXY NUCLEI
LUMINOSITY
POINT SOURCES
SPACE
STARS
SUPERNOVA REMNANTS
TELESCOPES
X-RAY DETECTION
X-RAY GALAXIES