M 37 Chandra X-Ray Point Source Catalog for Stellar Age-Rotation-Activity Calibration

A catalog of 1699 members of the M 37 open cluster, created by NASA using the Chandra X-ray Observatory. The dataset includes 426 stars with measured rotation periods, 278 with X-ray detections, and 76 with both, covering stellar masses from 0.4 to 1.3 solar masses. Observations were conducted over five days in November 2011 for a total of 440.5 ks to study the rotation-coronal activity relation at 500 million years.

Use Cases

• Calibrating the stellar age-rotation-activity relation based on X-ray luminosity and rotation period measurements.
• Analyzing the saturation threshold of coronal activity using calculated Rossby numbers.
• Studying the power-law relationship between rotation and activity for unsaturated rotators.
• Benchmarking stellar evolution models for ~500 Myr-old populations using a large, single-aged sample.

Strengths

• Large sample of 1699 cluster members with updated membership probabilities.
• Combines photometric, rotational (0.4-12.8 days), and X-ray luminosity (10^28.4 - 10^30.5 erg s^-1) data for a single-aged population.
• Observations span a continuous five-day period totaling 440.5 ks, improving sensitivity to faint sources.

Limitations

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

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Observations from the Chandra X-ray Observatory's Advanced CCD Imaging Spectrometer (ACIS) in Very Faint telemetry mode.

Time Range

Observations conducted between 2011 November 14 and November 19.

Freshness

Last updated 2026-03-13 18:17:45.940619; freshness should be verified.

Geography

Aimpoint at RA = 05h 52m 17.86s, Dec = +32° 33' 48.23" (J2000), covering a 16.9 x 16.9 arcmin^2 field of view.