Table A.1.
Journal of discovery observations.
| Target | Telescope | Instrument | Exposure (s) | Date (UTC) | Program ID |
|---|---|---|---|---|---|
| EUCL J150537.32+773441.0 | Keck | LRIS | 1200 | 2024-07-01 | U259 |
| EUCL J141841.29+694930.6 | Keck | LRIS | 2400 | 2024-07-01 | U259 |
| Keck | KCWI | 2400 | 2025-01-21 | U267 | |
| EUCL J125308.55+705432.3 | Keck | LRIS | 1200 | 2024-07-01a | U259 |
| Keck | MOSFIRE | 3900 | 2024-12-30b | U418 | |
| Keck | MOSFIRE | 4200 | 2025-01-08 | U418 | |
| EUCL J144545.82+714342.3 | Keck | LRIS | 1200 | 2024-07-02a | U259 |
| Keck | KCWI | 2400 | 2025-01-24a | U267 | |
| Keck | MOSFIRE | 3000 | 2025-01-25 | U418 | |
| EUCL J143448.06+685733.2 | Keck | LRIS | 2400 | 2024-07-03 | U259 |
| EUCL J115522.89+704612.3 | Keck | LRIS | 3600 | 2024-07-03 | U259 |
| EUCL J031547.94−684405.6 | Magellan | FIRE | 1800 | 2024-11-16 | |
| EUCL J025210.37−412533.8 | Magellan | FIRE | 1800 | 2024-11-16 | |
| EUCL J025029.93−531706.7 | Magellan | FIRE | 1800 | 2024-11-16 | |
| EUCL J041250.73−563949.7 | Magellan | FIRE | 1800 | 2024-11-16 | |
| Magellan | FIRE | 1800 | 2024-12-20a,c | ||
| Magellan | FIRE | 3600 | 2025-03-16b | ||
| EUCL J045148.19−342622.2 | Magellan | FIRE | 1800 | 2024-11-17 | |
| EUCL J052645.38−460902.7 | Magellan | FIRE | 1800 | 2024-11-17 | |
| EUCL J050240.93−384906.1 | Magellan | FIRE | 1800 | 2024-11-17 | |
| EUCL J052209.82−512709.2d | Magellan | FIRE | 3600 | 2024-11-18 | |
| EUCL J044326.27−533214.9 | Magellan | FIRE | 1800 | 2024-12-20 | |
| EUCL J091639.93+683652.9 | Keck | KCWI | 1200 | 2024-12-23 | U267 |
| EUCL J093330.60+742730.0 | Keck | KCWI | 1200 | 2024-12-23 | U267 |
| EUCL J135534.55+700055.5 | Keck | KCWI | 5100 | 2024-12-23b | U267 |
| Keck | MOSFIRE | 3300 | 2024-12-29 | U418 | |
| EUCL J134031.50+674715.1 | Keck | KCWI | 1200 | 2024-12-23c | U267 |
| Keck | KCWI | 1200 | 2025-01-24 | U267 | |
| EUCL J173243.48+601612.6 | Keck | KCWI | 600 | 2025-01-22b | U267 |
| EUCL J101255.87+663058.0 | Keck | KCWI | 1800 | 2025-01-22a | U267 |
| Keck | MOSFIRE | 2400 | 2025-06-16 | U275 | |
| Keck | MOSFIRE | 5400 | 2025-06-17 | U275 | |
| EUCL J172258.31+574133.5 | Keck | KCWI | 900 | 2025-01-23a,c | U267 |
| Keck | KCWI | 2100 | 2025-01-24b | U267 | |
| Keck | MOSFIRE | 1200 | 2025-01-25b | U267 | |
| Keck | KCWI | 1800 | 2025-01-28 | U267 | |
| Keck | KCWI | 3600 | 2025-06-18 | U275 |
Notes. All dates are given in Coordinated Universal Time (UTC). The list follows the chronological order of the first observation of each quasar.
No detection in this observation.
Some exposures were taken in twilight.
Cloudy conditions, corresponding to > 0.5 mag of extinction, or poor seeing, corresponding to > 1
5.
An echelle-mode observation was conducted for this target.
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