Table 2
Parameters of the maser lines observed with the VLA.
| Source | Distance | Array | Peak coordinatesa | V LSR,optb |
|
L H2Oc | Notes | |
| (Mpc) | RA | Dec. | (km s-1) | (Jy km s-1) | (L⊙) | |||
|
|
||||||||
| NGC 3556 | 12 | CnB | 11 11 31.46 ± 0.02 | +55 40 28.8 ± 0.2 | 738.2 ± 0.7 | 0.087 ± 0.004 | 0.29 ± 0.01 | |
| NGC 3556 | 12 | DnA | 11 11 31.47 ± 0.01 | +55 40 28.7 ± 0.1 | 737.5 ± 0.1 | 0.083 ± 0.005 | 0.28 ± 0.01 | |
| Arp 299 | ||||||||
| – IC 694 | 42 | A | 11 28 33.65 ± 0.01 | +58 33 46.8 ± 0.1 | 2996 ± 8 | 0.16 ± 0.03 | 6.4 ± 1.2 | |
| D | 11 28 33.65 ± 0.01 | +58 33 46.8 ± 0.1 | 2988 ± 2 | 0.46 ± 0.03 | 19 ± 1 | |||
| – NGC 3690 | ” | A | 11 28 30.99 ± 0.01 | +58 33 40.7 ± 0.1 | 3112 ± 8 | 0.41 ± 0.05 | 17 ± 2 | |
| D | 11 28 30.97 ± 0.02 | +58 33 40.8 ± 0.2 | 3112 ± 4 | 0.55 ± 0.03 | 22 ± 1 | |||
| – C+C’-complex | ” | A | 11 28 30.63 ± 0.01 | +58 33 52.4 ± 0.1 | 3179 ± 18 | 0.18 ± 0.04 | 7.5 ± 1.5 | tentative |
| C’ | D | 11 28 31.35 ± 0.02 | +58 33 49.8 ± 0.2 | 3158 ± 4 | 0.30 ± 0.04 | 12 ± 2 | ||
| C | D | 11 28 30.65 ± 0.11 | +58 33 49.3 ± 0.9 | 3142 ± 7 | 0.12 ± 0.03 | 4.9 ± 1.0 | tentative | |
| NGC 4151 | 13 | DnA | 12 10 32.58 ± 0.01 | +39 24 21.1 ± 0.1 | 695.6 ± 0.3 | 0.009 ± 0.002 | 0.035 ± 0.007 | tentative |
Notes.
Error estimates associated with this quantity are discussed in Sect. 2.4.
All values obtained by Gaussian fits to the maser line(s) with the exception of NGC 4151 where a Gaussian fit would have been meaningless. In this case, the channel width of the spectrum was taken as a reliable upper limit for the uncertainty in the peak velocity, and the error on the line-integrated intensity has been computed assuming errors of 10 and 20% in the line intensity and width, respectively.
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