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Radio source coordinate time series

 

 

1638+398

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

Right ascension: 250.1234698933964°
Declination: 39.7794524169718°
No. sessions: 1528
No. delays: 129394
Defining: Yes
RMS(α cos δ) = 39.3789 mas
RMS(δ) = 404.6821 mas
Cleaned No. sessions: 1360
Cleaned RMS(α cos δ) = 0.2226 mas
Cleaned RMS(δ) = 0.3064 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.