ivsopar.obspm.fr

Radio source coordinate time series

 

 

1221+071

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

Observed in only 2 session(s)

Right ascension: 185.9776012524170°
Declination: 6.8340477532993°
No. sessions: 2
No. delays: 87
Defining: No
RMS(α cos δ) = 0.0598 mas
RMS(δ) = 0.1548 mas
Cleaned No. sessions: 2
Cleaned RMS(α cos δ) = 0.0598 mas
Cleaned RMS(δ) = 0.1548 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.