An observing log of all J0225−6920 observations acquired with ULTRACAM which were subsequently used for light-curve modelling. Nights were not noticeably impacted by clouds. The duration represents the time that the telescope was on target after acquisition. MJDmid is the MJD at the centre of the observing period. In the instrument column, UCAM is an abbreviation for ULTRACAM. Observations in the us filter were 3 × the cadence stated. ULTRACAM has a dead time of 24 ms between adjacent exposures.
| Night . | MJDmid . | Filters . | Telescope . | Instrument . | Cadence (s) . | Duration (min) . | Comments . |
|---|---|---|---|---|---|---|---|
| 2021-07-07 | 59403.3 | us gs is | NTT | UCAM | 3.0 | 89.8 | Seeing 1.2 arcsec |
| 2021-07-08 | 59404.3 | us gs is | NTT | UCAM | 3.0 | 21.9 | Seeing 1.3 arcsec |
| 2021-07-09 | 59405.4 | us gs is | NTT | UCAM | 3.0 | 76.1 | Seeing 1.1–1.5 arcsec |
| 2021-07-15 | 59411.4 | us gs is | NTT | UCAM | 3.0 | 44.5 | Half with 1.5 arcsec seeing, half > 2.0 arcsec |
| 2021-07-16 | 59412.4 | us gs is | NTT | UCAM | 3.2 | 35.6 | Seeing 1.2 arcsec |
| 2022-09-17 | 59840.2 | us gs rs | NTT | UCAM | 3.3 | 316.2 | Seeing 1.8–2.2 arcsec |
| 2022-09-18 | 59841.3 | us gs rs | NTT | UCAM | 3.7 | 201.6 | Seeing 1.8–2.0 arcsec |
| 2022-09-19 | 59842.3 | us gs rs | NTT | UCAM | 3.2 | 142.1 | Seeing 2.2 arcsec with short spikes |
| Night . | MJDmid . | Filters . | Telescope . | Instrument . | Cadence (s) . | Duration (min) . | Comments . |
|---|---|---|---|---|---|---|---|
| 2021-07-07 | 59403.3 | us gs is | NTT | UCAM | 3.0 | 89.8 | Seeing 1.2 arcsec |
| 2021-07-08 | 59404.3 | us gs is | NTT | UCAM | 3.0 | 21.9 | Seeing 1.3 arcsec |
| 2021-07-09 | 59405.4 | us gs is | NTT | UCAM | 3.0 | 76.1 | Seeing 1.1–1.5 arcsec |
| 2021-07-15 | 59411.4 | us gs is | NTT | UCAM | 3.0 | 44.5 | Half with 1.5 arcsec seeing, half > 2.0 arcsec |
| 2021-07-16 | 59412.4 | us gs is | NTT | UCAM | 3.2 | 35.6 | Seeing 1.2 arcsec |
| 2022-09-17 | 59840.2 | us gs rs | NTT | UCAM | 3.3 | 316.2 | Seeing 1.8–2.2 arcsec |
| 2022-09-18 | 59841.3 | us gs rs | NTT | UCAM | 3.7 | 201.6 | Seeing 1.8–2.0 arcsec |
| 2022-09-19 | 59842.3 | us gs rs | NTT | UCAM | 3.2 | 142.1 | Seeing 2.2 arcsec with short spikes |
An observing log of all J0225−6920 observations acquired with ULTRACAM which were subsequently used for light-curve modelling. Nights were not noticeably impacted by clouds. The duration represents the time that the telescope was on target after acquisition. MJDmid is the MJD at the centre of the observing period. In the instrument column, UCAM is an abbreviation for ULTRACAM. Observations in the us filter were 3 × the cadence stated. ULTRACAM has a dead time of 24 ms between adjacent exposures.
| Night . | MJDmid . | Filters . | Telescope . | Instrument . | Cadence (s) . | Duration (min) . | Comments . |
|---|---|---|---|---|---|---|---|
| 2021-07-07 | 59403.3 | us gs is | NTT | UCAM | 3.0 | 89.8 | Seeing 1.2 arcsec |
| 2021-07-08 | 59404.3 | us gs is | NTT | UCAM | 3.0 | 21.9 | Seeing 1.3 arcsec |
| 2021-07-09 | 59405.4 | us gs is | NTT | UCAM | 3.0 | 76.1 | Seeing 1.1–1.5 arcsec |
| 2021-07-15 | 59411.4 | us gs is | NTT | UCAM | 3.0 | 44.5 | Half with 1.5 arcsec seeing, half > 2.0 arcsec |
| 2021-07-16 | 59412.4 | us gs is | NTT | UCAM | 3.2 | 35.6 | Seeing 1.2 arcsec |
| 2022-09-17 | 59840.2 | us gs rs | NTT | UCAM | 3.3 | 316.2 | Seeing 1.8–2.2 arcsec |
| 2022-09-18 | 59841.3 | us gs rs | NTT | UCAM | 3.7 | 201.6 | Seeing 1.8–2.0 arcsec |
| 2022-09-19 | 59842.3 | us gs rs | NTT | UCAM | 3.2 | 142.1 | Seeing 2.2 arcsec with short spikes |
| Night . | MJDmid . | Filters . | Telescope . | Instrument . | Cadence (s) . | Duration (min) . | Comments . |
|---|---|---|---|---|---|---|---|
| 2021-07-07 | 59403.3 | us gs is | NTT | UCAM | 3.0 | 89.8 | Seeing 1.2 arcsec |
| 2021-07-08 | 59404.3 | us gs is | NTT | UCAM | 3.0 | 21.9 | Seeing 1.3 arcsec |
| 2021-07-09 | 59405.4 | us gs is | NTT | UCAM | 3.0 | 76.1 | Seeing 1.1–1.5 arcsec |
| 2021-07-15 | 59411.4 | us gs is | NTT | UCAM | 3.0 | 44.5 | Half with 1.5 arcsec seeing, half > 2.0 arcsec |
| 2021-07-16 | 59412.4 | us gs is | NTT | UCAM | 3.2 | 35.6 | Seeing 1.2 arcsec |
| 2022-09-17 | 59840.2 | us gs rs | NTT | UCAM | 3.3 | 316.2 | Seeing 1.8–2.2 arcsec |
| 2022-09-18 | 59841.3 | us gs rs | NTT | UCAM | 3.7 | 201.6 | Seeing 1.8–2.0 arcsec |
| 2022-09-19 | 59842.3 | us gs rs | NTT | UCAM | 3.2 | 142.1 | Seeing 2.2 arcsec with short spikes |
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