Table 1.
Observations of the Galactic centre analysed in this survey.
| Date | MJDstart |
 |
 |
 |
 |
 |
 |
 |
 |
Project |
|---|---|---|---|---|---|---|---|---|---|---|
| (h) | (h) | (K) | (K) | (K) | ||||||
| 2016 Dec 12 | 57734.459837 | 2.0 | 3.9 | 118.2 | 126.6 | 122.4 | 141 | 25 | 76 | 159-16 |
| 2016 Dec 21 | 57743.406261 | 2.2 | 3.2 | 117.7 | 158.4 | 138.0 | 130 | 22 | 116 | 159-16 |
| 2016 Dec 22 | 57744.399016 | 1.8 | 3.3 | 141.5 | 225.2 | 183.3 | 148 | 56 | 120 | 159-16 |
| 2017 Jan 02 | 57755.366388 | 1.8 | 3.1 | 137.8 | 213.5 | 175.6 | 55 | 46 | 67 | 159-16 |
| 2017 Jan 23 | 57776.368090 | 2.5 | 3.0 | 113.1 | 137.4 | 125.3 | 70 | 70 | 184 | 159-16 |
| 2017 Jan 30 | 57783.304502 | 2.4 | 3.2 | 146.1 | 225.2 | 185.7 | 89 | 89 | 123 | 159-16 |
| 2017 Feb 14 | 57798.268530 | 2.3 | 3.0 | 110.0 | 130.9 | 120.4 | 96 | 61 | 105 | 159-16 |
| 2017 Mar 01 | 57813.330613 | 1.0 | 1.1 | 110.7 | 119.9 | 115.3 | 244 | 247 | 236 | 159-16 |
| 2017 Mar 10 | 57822.205694 | 2.5 | 3.0 | 107.4 | 123.8 | 115.6 | 37 | 28 | 49 | 159-16 |
| 2017 Mar 28 | 57840.163564 | 3.8 | 4.6 | 126.1 | 152.2 | 139.1 | 15 | 45 | 36 | 159-16 |
| 2017 Apr 18 | 57861.084317 | 2.0 | 2.4 | 119.9 | 155.3 | 137.6 | 119 | 68 | 134 | 159-16 |
| 2017 May 18 | 57890.996898 | 1.7 | 3.1 | 145.1 | 234.5 | 189.8 | 12 | 26 | 30 | 159-16 |
| 2017 May 24 | 57896.989999 | 1.3 | 2.2 | 164.3 | 303.3 | 233.8 | 38 | 42 | 49 | 159-16 |
| 2017 Jun 05 | 57909.951793 | 2.1 | 4.1 | 153.1 | 262.9 | 208.0 | 11 | 12 | 9 | 039-17 |
| 2017 Jul 03 | 57937.904224 | 1.3 | 3.2 | 115.7 | 140.4 | 128.0 | 44 | 42 | 49 | 039-17 |
| 2017 Sep 04 | 58000.726469 | 3.0 | 4.4 | 139.3 | 209.9 | 174.6 | 81 | 69 | 76 | 039-17 |
| 2017 Sep 05 | 58001.711724 | 3.7 | 4.9 | 173.4 | 310.7 | 242.1 | 25 | 20 | 28 | 039-17 |
| 2017 Sep 28 | 58024.738425 | 1.7 | 2.0 | 222.0 | 504.2 | 363.1 | 49 | 46 | 64 | 039-17 |
| 2017 Oct 09 | 58035.638182 | 2.7 | 4.1 | 161.5 | 274.7 | 218.1 | 29 | 42 | 43 | 039-17 |
| 2017 Nov 08 | 58065.535856 | 2.7 | 4.1 | 113.0 | 134.3 | 123.6 | 30 | 32 | 32 | 039-17 |
| 2017 Nov 20 | 58077.513564 | 2.5 | 3.5 | 123.5 | 164.1 | 143.8 | 23 | 31 | 25 | 039-17 |
| 2017 Dec 04 | 58091.491030 | 2.3 | 2.9 | 113.7 | 144.5 | 129.1 | 51 | 51 | 68 | 145-17 |
| 2017 Dec 18 | 58105.442222 | 1.7 | 2.7 | 111.3 | 140.2 | 125.8 | 37 | 79 | 98 | 145-17 |
| 2018 Jan 03 | 58121.407222 | 3.0 | 3.7 | 116.5 | 148.5 | 132.5 | 38 | 79 | 157 | 145-17 |
| 2018 Jan 15 | 58133.380520 | 2.3 | 3.3 | 121.2 | 146.9 | 134.0 | 41 | 38 | 52 | 145-17 |
| 2018 May 01 | 58239.095451 | 2.0 | 3.6 | 110.3 | 116.2 | 113.2 | 42 | 16 | 101 | 145-17 |
| 2018 May 15 | 58253.030335 | 2.1 | 3.2 | 118.5 | 147.1 | 132.8 | 27 | 11 | 18 | 145-17 |
| 2018 May 22 | 58259.986226 | 1.8 | 3.1 | 147.5 | 239.8 | 193.7 | 28 | 12 | 20 | 145-17 |
Notes. Columns show the date, the modified Julian Date of the start of each observation (MJDstart), the integration time on-source (
), the total time of each searched time series after concatenating and padding gaps (
, see Sect. 3.2), the average system temperature of the different datsets (3, 2, and 3+2 mm) on the line of sight (⟨Tsys⟩), the number of candidates produced per searched epoch (Ncands), and the IRAM project number to which the observation corresponds.
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