LALA Bootes Field: Chandra X-Ray Point Source Catalog with Optical Counterparts

A 172 ks Chandra X-ray observation of the LALA Bootes extragalactic field, one of the deepest such images. The catalog contains 168 X-ray sources, with optical counterparts identified for 144 of them using R-band imaging from the NOAO Deep Wide-Field Survey. The table was created by NASA HEASARC in March 2007 based on published astronomical data.

Use Cases

• Analyze X-ray source counts and flux distributions based on the multi-band detection data.
• Study the correlation between X-ray sources and optical counterparts based on the positional matching results.
• Benchmark deep-field X-ray observations against other deep fields like CDF-N and CDF-S.
• Investigate potential false matches in source identification based on the described statistical estimates.

Strengths

• Contains 168 X-ray sources detected in a deep, 172 ks observation.
• Provides flux limits for point sources: 1.5e-16 ergs/cm²/s (0.5-2.0 keV) and 1.0e-15 ergs/cm²/s (2.0-10.0 keV).
• Optical counterparts are identified for 144 sources with a high estimated correctness rate of at least 90%.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data is from 2002 observations; freshness should be verified for current research.

Provenance

Source

NASA HEASARC, based on CDS table J/AJ/127/213.

Collection Method

Analysis of Chandra ACIS-I observations from 2002.

Time Range

Observations from 2002.

Freshness

Last updated 2026-03-13 17:19:35.680112; freshness should be verified.

Geography

Extragalactic sky, LALA Bootes field.