NGC 300 Chandra X-Ray Point Source Catalog: 95 Sources from 63-ks Observation

A 63-ks Chandra ACIS-I observation on 2010 September 25 yielded a catalog of 95 X-ray point sources in the nearby spiral galaxy NGC 300. The catalog was created by the HEASARC in September 2014 based on data from the Chandra Local Volume Survey and includes cross-correlation with XMM-Newton data and optical counterpart analysis from Hubble Space Telescope imaging. Sources were detected down to a limiting unabsorbed luminosity of ~10^36 erg/s in the 0.35-8 keV band.

Use Cases

• Classifying X-ray sources (e.g., X-ray binaries, supernova remnants) based on the described classification scheme and optical counterpart data.
• Analyzing X-ray luminosity functions (XLFs) for different energy bands and stellar population ages as mentioned in the reference paper.
• Identifying X-ray transient candidates by cross-correlating the 95 Chandra sources with previous XMM-Newton observations.
• Studying the correlation between X-ray source distribution and star formation using the derived X-ray scale length and star formation rate.

Strengths

• Contains 95 high-significance X-ray point sources detected with a strict Poisson probability threshold (pns < 4 x 10^-6).
• Integrates multi-wavelength data, including cross-correlation with XMM-Newton and optical counterpart searches using Hubble Space Telescope imaging.
• Derives specific astrophysical parameters, including an X-ray scale length of 1.7 +/- 0.2 kpc and a recent star formation rate of 0.12 M_sun/yr.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Optical counterpart data from Hubble Space Telescope covers only ~32% of the Chandra field.

Provenance

Source

National Aeronautics and Space Administration (NASA), Chandra X-Ray Observatory, HEASARC

Collection Method

Observational data from Chandra ACIS-I instrument, processed with ACIS-Extract (AE) and wavdetect source detection algorithms.

Time Range

Observation date: 2010 September 25.

Freshness

Last updated 2026-03-13 16:34:51.069964; freshness should be verified.

Geography

Nearby SA(s)d spiral galaxy NGC 300, located at a distance of 2.0 Mpc, covering ~88% of the D_25 isophote (R ~ 6.3 kpc).