ivsopar.obspm.fr

Radio source coordinate time series

 

 

1830+139

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

Observed in only 6 session(s)

Right ascension: 278.1811293105418°
Declination: 13.9623332950047°
No. sessions: 6
No. delays: 221
Defining: No
RMS(α cos δ) = 1.7330 mas
RMS(δ) = 1.7488 mas
Cleaned No. sessions: 3
Cleaned RMS(α cos δ) = 0.5959 mas
Cleaned RMS(δ) = 0.7570 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.