Chandra Galactic Plane Point Source Catalog with 274 New X-ray Sources

A Galactic plane region at coordinates (l, b) ~ (28.5 degrees, 0.0 degrees) was observed using the Chandra ACIS-I instrument. The catalog contains 274 newly detected X-ray point sources, with sensitivity down to ~2x10^-16 erg/s/cm^2 in the soft band. NASA HEASARC created this browse table in December 2006 based on the CDS catalog J/ApJ/635/214/.

Use Cases

• Classifying X-ray sources based on spectral hardness ratios mentioned in the description
• Studying the distribution of background AGNs in the Galactic plane based on surface density analysis
• Identifying nearby X-ray-active stars from soft X-ray sources with near-infrared counterparts
• Investigating cataclysmic variables from hard X-ray sources with limited near-IR matches

Strengths

• Contains 274 newly detected X-ray point sources from a previously unexplored region
• Provides point-source sensitivity figures for two energy bands (e.g., ~2x10^-16 erg/s/cm^2 in 0.5-2 keV)
• Includes follow-up near-infrared survey data for source identification

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment

Provenance

Source

NASA HEASARC based on CDS Catalog J/ApJ/635/214/

Collection Method

Deep hard X-ray observation using the Chandra ACIS-I instrument, followed by a near-infrared survey with SofI at ESO/NTT

Time Range

Observation date is not specified in the provided metadata.

Freshness

Last updated 2026-03-13 18:25:32.339874; freshness should be verified

Geography

Galactic plane region at (l, b) ~ (28.5 degrees, -0.0 degrees), covering ~250 square arcminutes