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Date and Time of the Query: 2019-04-25 T02:08:54 PDT
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For refcode 2012ApJ...758...15B:
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2012ApJ...758...15B The Chandra Local Volume Survey: The X-Ray Point-source Catalog of NGC 300 Binder, B.; Williams, B. F.; Eracleous, M.; Gaetz, T. J.; Plucinsky, P. P.; Skillman, E. D.; Dalcanton, J. J.; Anderson, S. F.; Weisz, D. R.; Kong, A. K. H. Abstract. We present the source catalog of a new Chandra ACIS-I observation of NGC 300 obtained as part of the Chandra Local Volume Survey. Our 63 ks exposure covers ~88% of the D_25_ isophote (R ~ 6.3 kpc) and yields a catalog of 95 X-ray point sources detected at high significance to a limiting unabsorbed 0.35-8 keV luminosity of ~10^36^ erg s^-1^. Sources were cross-correlated with a previous XMM-Newton catalog, and we find 75 "X-ray transient candidate" sources that were detected by one observatory, but not the other. We derive an X-ray scale length of 1.7 +/- 0.2 kpc and a recent star formation rate of 0.12 M_sun_ yr^-1^ in excellent agreement with optical observations. Deep, multi-color imaging from the Hubble Space Telescope, covering ~32% of our Chandra field, was used to search for optical counterparts to the X-ray sources, and we have developed a new source classification scheme to determine which sources are likely X-ray binaries, supernova remnants, and background active galactic nucleus candidates. Finally, we present the X-ray luminosity functions (XLFs) at different X-ray energies, and we find the total NGC 300 X-ray point-source population to be consistent with other late-type galaxies hosting young stellar populations (lsim 50 Myr). We find that XLF of sources associated with older stellar populations has a steeper slope than the XLF of X-ray sources coinciding with young stellar populations, consistent with theoretical predictions. Key words: galaxies: individual: NGC 300, galaxies: spiral, X-rays: binaries, X-rays: galaxies
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