| Show | Sort | Join tables | Column | Constraint | Explain (UCD) |
| | | (ALL) | recno | | Record number assigned by the VizieR team. Should Not be used for identification. (meta.record) (RECORD) |
| | |  (ALL) | IRS | (char) | Object name (IRS1 or IRS3) (Note G1)
(ID_PARENT) |
| | | (1) | Maser | (char) | Maser identification number (Note 1)
(ID_NUMBER) |
| | | (ALL) | RV | km/s | Radial velocity (VELOC_HC) |
| | | (1) | l_RV | (char) | Limit flag on RV error (CODE_LIMIT) |
| | | (1) | e_RV | km/s | Uncertainty in RV (Note 2)
(ERROR) |
| | | (1) | Speak | Jy | Peak fitted flux density (PHOT_FLUX_RADIO_22G) |
| | | (1) | e_Speak | Jy | Uncertainty Speak (ERROR) |
| | | (ALL) | EWOff | mas | Relative position East-West (POS_EQ_RA_OFF) |
| | | (1) | e_EWOff | mas | Uncertainty in EWOff (ERROR) |
| | | (ALL) | NSOff | mas | Relative position North-South (POS_EQ_DEC_OFF) |
ALL cols | | | |
| | | (1) | e_NSOff | mas | Uncertainty in NSOff (ERROR) |
| | | (1) | SChan | | Number of contributing spectral channels (NUMBER) |
| | | (1) | HPFW | km/s | (n) Half Power Full Width of fitted Gaussian (Note 3)
(FIT_PARAM_VALUE) |
| | | (1) | e_HPFW | km/s | (n) Uncertainty in HPFW (ERROR) |
| | | (ALL) | MNum | | (n) Associated proper motion number (Note 4)
(ID_NUMBER) |
| | | (2) | f_MNum | (char) | [cd] Flag on MNum (Note 1)
(CODE_MISC) |
| | | (2) | EWVel | km/s | Measured East-West proper motion expressed as a velocity (Note 2)
(ERROR) |
| | | (2) | e_EWVel | km/s | Uncertainty in EWVel (ERROR) |
| | | (2) | NSVel | km/s | Measured North-South proper motion expressed as a velocity (Note 2)
(ERROR) |
| | | (2) | e_NSVel | km/s | Uncertainty in NSVel (ERROR) |
| | | (2) | ID1 | (char) | Epoch1 maser feature identification number (ID_NUMBER) |
| | | (2) | ID2 | (char) | Epoch2 maser feature identification number (ID_NUMBER) |
| | | (2) | ID3 | (char) | Epoch3 maser feature identification number (ID_NUMBER) |
| | | (2) | ID4 | (char) | Epoch4 maser feature identification number (ID_NUMBER) |
ALL cols | | | |