2MASS Calibration Scan Metadata for LMC/SMC Deep Observation Campaign

The 2MASS LMC/SMC Calibration Scan Information Table provides basic metadata for each survey mode scan taken during the Two Micron All Sky Survey operations. It was created by the National Aeronautics and Space Administration and last updated in March 2026. The data supports photometric calibration derived from observations of 35 regular fields and 5 special fields in the Magellanic Clouds, scanned hundreds to thousands of times.

Use Cases

• Modeling photometric zero point offsets over time based on repeated calibration field scans.
• Analyzing atmospheric extinction coefficients derived from long-term 2MASS observations.
• Studying the deep observation campaign targeting the Large and Small Magellanic Clouds between November 2000 and February 2001.
• Comparing observation frequency between equatorial and high-declination calibration fields.

Strengths

• Calibration fields were scanned between 562 and 3692 times, providing repeated measurements.
• Includes data from a dedicated deep observation campaign with 5 special fields scanned 108 to 468 times.
• Observations cover a defined temporal range for the Magellanic Cloud campaign from November 2000 to February 2001.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect temporal bias inherent to the specific 2MASS survey period.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Observations from the Two Micron All Sky Survey (2MASS) operations.

Time Range

Includes a specific campaign from November 2000 to February 2001.

Freshness

Last updated 2026-03-13 18:27:57.371991; freshness should be verified.

Geography

Calibration fields near declinations of -30°, 0°, +30°, and within the Large and Small Magellanic Clouds.