ivsopar.obspm.fr

Radio source coordinate time series

 

 

1221+809

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

Right ascension: 185.9187239839521°
Declination: 80.6678723641196°
No. sessions: 77
No. delays: 4329
Defining: Yes
RMS(α cos δ) = 0.3179 mas
RMS(δ) = 0.2917 mas
Cleaned No. sessions: 73
Cleaned RMS(α cos δ) = 0.2219 mas
Cleaned RMS(δ) = 0.2242 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.