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Radio source coordinate time series

 

 

1821+107

Data
SIMBAD - NED - LQAC
MOJAVE - Astrogeo - BVID
Aladin - SDSS

Right ascension: 276.0118968777775°
Declination: 10.7399371488409°
No. sessions: 52
No. delays: 1652
Defining: No
RMS(α cos δ) = 0.2695 mas
RMS(δ) = 0.7464 mas
Cleaned No. sessions: 49
Cleaned RMS(α cos δ) = 0.1562 mas
Cleaned RMS(δ) = 0.3676 mas

Note: Cleaning is a simple outlier elimination algorithm to remove bad sessions. Points whose distance to the mean scaled by the error is larger than 3 are iteratively deleted. The cleaned rms are provided as is and should be taken with some care, especially if the number of sessions is small.