Open Access
Table 1
Log of millimetre observations.
| UT date | ⟨ rh ⟩ | ⟨ Δ⟩ | Phase(a) | Integ.(b) | Mode(c) | pwv(d) | Freq. range |
|---|---|---|---|---|---|---|---|
| (yyyy/mm/dd.d–dd.d) | (au) | (au) | (min) | (mm) | (GHz) | ||
| 21P/Giacobini-Zinner 1998: JCMT 15-m | |||||||
| 1998/10/30.21–30.31 | 1.080 | 0.925 | 58.8° | 92 | F | 0.7 | 354.46–354.60,345.75–345.89(e) |
| 1998/10/31.22–31.31 | 1.076 | 0.920 | 59.0° | 102 | P | 0.8 | 338.31–338.45,338.60–338.74 |
| 1998/11/01.13–01.14 | 1.073 | 0.916 | 59.3° | 9 | F | 0.6 | 362.59–362.72,354.46–354.60(e) |
| 01.15–01.18 | 1.073 | 0.916 | 59.3° | 40 | P | 0.7 | 362.58–362.73,354.46–354.60(e) |
| 01.20–01.22 | 1.072 | 0.916 | 59.3° | 28 | P | 0.8 | 362.58–362.73 |
| 01.24–01.27 | 1.072 | 0.916 | 59.3° | 17 | F | 0.9 | 342.82–342.95 |
| 01.27–01.32 | 1.072 | 0.916 | 59.3° | 48 | P | 0.9 | 342.81–342.96 |
| 1998/11/02.11–02.21 | 1.069 | 0.912 | 59.5° | 77 | F | 0.9 | 345.73–345.86 |
| 02.22–02.26 | 1.068 | 0.911 | 59.5° | 45 | P | 1.0 | 345.72–345.87 |
| 02.27–02.31 | 1.068 | 0.911 | 59.5° | 28 | F | 1.1 | 354.46–354.60,345.75–345.89(e) |
| 1998/11/03.17–03.29 | 1.065 | 0.907 | 59.8° | 105 | F | 1.3 | 351.72–351.85 |
| 1998/11/04.13–04.20 | 1.062 | 0.903 | 60.0° | 80 | P | 2.8 | 265.81–265.96,262.81–262.96(e) |
| 04.24–04.29 | 1.062 | 0.902 | 60.0° | 44 | F | 1.9 | 350.86–350.96 |
| 21P/Giacobini-Zinner 1998: CSO 10.4-m | |||||||
| 1998/11/10.17–10.27 | 1.046 | 0.879 | 61.2° | 90.7 | W | 6.6 | 265.7–266.1, 262.7–263.1(e) |
| 1998/11/13.17–13.27 | 1.040 | 0.870 | 61.6° | 85.3 | W | 6.3 | 265.7–266.1, 262.7–263.1(e) |
| 1998/11/14.16–14.23 | 1.039 | 0.868 | 61.8° | 53.3 | W | 0.8 | 265.7–266.1, 262.7–263.1(e) |
| 11/14.23–14.31 | 1.039 | 0.867 | 61.8° | 74.7 | W | 0.8 | 304.0–304.4, 307.0–307.4(e) |
| 1998/11/15.17–15.25 | 1.037 | 0.865 | 61.9° | 85.3(f) | W | 3.2 | 304.0–304.4, 307.0–307.4(e) |
| 21P/Giacobini-Zinner 1998: IRAM 30-m | |||||||
| 1998/11/11.60–11.83 | 1.043 | 0.874 | 61.4° | 121.4 | F | 2.0 | 88.6, 168.8, 265.9 |
| 1998/11/12.58–12.70 | 1.041 | 0.872 | 61.6° | 90 | W | 2.4 | 88.6, 168.8, 265.9 |
| 11/12.71–12.83 | 1.041 | 0.871 | 61.6° | 90 | F | 2.7 | 88.6, 168.8, 265.9 |
| 1998/11/13.57–13.67 | 1.039 | 0.869 | 61.7° | 80 | W | 5.0 | 88.6, 168.8, 265.9 |
| 11/13.68–13.83 | 1.039 | 0.869 | 61.7° | 85.5 | F | 4.5 | 88.6, 168.8, 265.9 |
| 1998/11/14.55–14.81 | 1.038 | 0.866 | 61.8° | 176.5 | F | 4.5 | 88.6, 168.8, 265.9 |
| 1998/11/15.55–15.81 | 1.037 | 0.864 | 61.9° | 210 | W | 3.8 | 88.6, 145.1, 225.7 |
| 21P/Giacobini-Zinner 2018: IRAM 30-m | |||||||
| 2018/09/14.22–14.28 | 1.014 | 0.394 | 77.6° | 61 | W | 16–37 | 83.3–91.1, 141.6–149.4 |
| 14.38–14.40 | 1.015 | 0.394 | 77.5° | 19 | W | 16–40 | 83.3–91.1, 141.6–149.4 |
| 2018/09/15.09–15.12 | 1.015 | 0.395 | 77.4° | 28 | W | 15–18 | 248.7–256.5, 264.4–272.2 |
| 15.15–15.25 | 1.015 | 0.395 | 77.4° | 98 | W | 19–23 | 83.3–91.1, 141.6–149.4 |
| 15.27–15.37 | 1.015 | 0.395 | 77.3° | 79 | W | 19–27 | 83.3–91.1, 141.6–149.4 |
| 2018/09/16.10–16.22 | 1.016 | 0.397 | 77.1° | 121 | W | 11–14 | 146.9–154.7, 162.6–170.4 |
| 16.39–16.40 | 1.017 | 0.397 | 77.1° | 14 | W | 14 | 146.9–154.7, 162.6–170.4 |
| 16.43–16.46 | 1.017 | 0.397 | 77.1° | 32.7 | W | 11 | 83.3–91.1, 225.1–232.8 |
| 2018/09/17.09–17.11 | 1.018 | 0.399 | 76.9° | 23.3 | W | 9–10 | 83.3–91.1, 141.6–149.4 |
| 17.18–17.22 | 1.018 | 0.399 | 76.9° | 42 | W | 9–10 | 83.3–91.1, 141.6–149.4 |
| 17.25–17.29 | 1.018 | 0.399 | 76.9° | 46.7 | W | 9–10 | 83.3–91.1, 161.6–169.4 |
| 17.30–17.34 | 1.018 | 0.399 | 76.8° | 46.7 | W | 12–27 | 83.3–91.1, 161.6–169.4 |
| 2018/09/18.10–18.22 | 1.019 | 0.401 | 76.6° | 121.3 | W | 9 | 83.3–91.1, 161.6–169.4 |
| 18.24–18.35 | 1.019 | 0.402 | 76.5° | 103 | W | 10–12 | 83.3–91.1, 218.2–226.0 |
| 41P/Tuttle-Giacobini-Kresák: IRAM 30-m | |||||||
| 2017/04/26.00–26.04 | 1.061 | 0.179 | 67.7° | 60 | W | 3.0 | 248.7–256.5, 264.4–272.2 |
| 26.07–26.09 | 1.061 | 0.179 | 67.6° | 28.0 | W | 4.2 | 224.9–232.7, 240.5–248.3 |
| 2017/05/01.00–01.03 | 1.074 | 0.192 | 64.8° | 36 | W | 5.5 | 248.7–256.5, 264.4–272.2 |
| 01.07–01.09 | 1.074 | 0.192 | 64.7° | 18.7 | W | 6.0 | 146.9–154.7, 162.6–170.4 |
| 64P/Swift-Gehrels: IRAM 30-m | |||||||
| 2018/12/11.75–11.76 | 1.465 | 0.577 | 26.6° | 18.7 | W | 1.6 | 248.7–256.5, 264.4–272.2 |
| 2018/12/17.94–17.96 | 1.490 | 0.618 | 27.5° | 23.3 | W | 2.2 | 240.4–248.1, 256.0–263.8 |
| 38P/Stephan-Oterma: IRAM 30-m | |||||||
| 2018/12/12.11–12.12 | 1.636 | 0.768 | 23.9° | 14.0 | W | 4.5 | 209.7–217.5, 225.4–233.1 |
| 2018/12/13.11–13.12 | 1.639 | 0.767 | 23.5° | 10.3 | W | 5.3 | 146.9–154.7, 162.6–170.4 |
| 2018/12/17.92–17.93 | 1.655 | 0.766 | 21.5° | 9.3 | W | 2.5 | 240.4–248.1, 256.0–263.8 |
Notes. (a)Phase angle. (b)Total (all setups included) integration time (ON+OFF) on the source. (c)Observing mode: F = frequency switching, W = Wobbler switching (nodding of the secondary mirror), P = position/beam switching. (d)Mean precipitable water vapour in the atmosphere above the telescope. (e)Spectra obtained in DSB mode with the two frequency domains overlapping in the same spectrum. (f)Likely unstable tuning, data not used.
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