ivsopar.obspm.fr

Radio source coordinate time series

 

 

1637+574

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

Right ascension: 249.5560678839714°
Declination: 57.3399941346764°
No. sessions: 363
No. delays: 10435
Defining: Yes
RMS(α cos δ) = 0.2016 mas
RMS(δ) = 0.2738 mas
Cleaned No. sessions: 340
Cleaned RMS(α cos δ) = 0.1977 mas
Cleaned RMS(δ) = 0.2432 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.