Table 3
Radio continuum emission and representative SiO upper limits in confirmed and candidate PNe with OH and/or H2O masers (sample 1).
| Source | RA(J2000) | Dec(J2000) | S43 (mJy) | S45 (mJy) | Sv1 (mJy) | Sv2 (mJy) |
|---|---|---|---|---|---|---|
| IRAS 15103–5754 | 15:14:18.42 | −58:05:21.0 | 18.41 ± 0.09 | 19.26 ± 0.15 | <8 | <8 |
| IRAS 16333–4807 | 16:37:06.55 | −48:13:43.9 | 103.6 ± 0.3 | 109.9 ± 0.7 | <8 | <8 |
| IRAS 16372–4808 | 16:40:55.97 | −48:13:59.9 | 57.98 ± 0.08 | 59.6 ± 0.4 | <7 | <6 |
| OH 341.6811+00.2634 | 16:51:53.66 | −43:47:16.8 | 16.44 ± 0.08 | 16.32 ± 0.11 | <7 | <7 |
| NGC 6302 | 17:13:44.56 | −37:06:10.4 | 1475.2 ± 1.1 | 1449.2 ± 1.2 | <41 | <43 |
| IRAS 17347–3139 | 17:38:00.55 | −31:40:55.4 | 320.15 ± 0.15 | 313.3 ± 2.2 | <7 | <5 |
| JaSt 23 | 17:40:23.05 | −27:49:11.5 | 21.98 ± 0.05 | 22.49 ± 0.15 | <7 | <6 |
| IRAS 17393–2727 | 17:42:33.13 | −27:28:25.0 | 22.41 ± 0.08 | 23.38 ± 0.14 | <6 | <6 |
| IRAS 18061–2505 | 18:09:12.44 | −25:04:34.1 | 55.88 ± 0.07 | 56.7 ± 0.6 | <6 | <5 |
| Vy 2–2 | 19 24 22.22 | +09:53:56.3 | 253.28 ± 0.14 | 264.0 ± 1.1 | <7 | <7 |
| K 3–35 | 19:27:44.01 | +21:30:05.1 | 12.45 ± 0.07 | 12.38 ± 0.14 | <7 | <8 |
Notes. The positions listed in this table were obtained by fitting elliptical Gaussians to the images at 43 GHz. S43 are S45 the flux densities at 43 and 45 GHz, respectively. Sv1 and Sv2 are the 3σ upper limits per channel of v = 1 and 2 of 28SiO, respectively, as representative of the sensitivity for spectral line detection in our data. Uncertainties are at 1σ level. In the case of NGC 6302, for which we could not obtain reliable images, the reported position and flux densities of the continuum emission were obtained by fitting a model of elliptical Gaussian source to the visibilities. For this source, we report the formal error for the flux density obtained in the fit, which most likely underestimate the actual flux density uncertainty if the flux distribution significantly departs from a Gaussian function. The SiO upper limits for NGC 6302 were calculated in spectra obtained directly from the calibrated visibility data.
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