Open Access
Table A.1.
System parameters and STIS observation log
| Target | PSF1 | PSF2 | ||
|---|---|---|---|---|
| Object | 3C 273 | TYC 287-284-1 | TYC 292-743-1 | |
| G | 12.84 | 12.77 | 11.49 | |
| Bp − Rp | 0.494 | 0.515 | 0.536 | |
| G − Rp | 0.348 | 0.327 | 0.340 | |
| Angular distancea | ⋯ |
 |
 |
|
| Visit | ORIENTATb | Exposure time (UT 2022-03-26) | ||
| 01 |
 |
2 × 3 × 315 s | ⋯ | ⋯ |
| 02c |
 |
2 × 3 × 315 s | ⋯ | ⋯ |
| 03 |
 |
⋯ | 2 × 3 × 294 s | ⋯ |
| 04 |
 |
2 × 3 × 315 s | ⋯ | ⋯ |
| Exposure time (UT 2022-01-08) |
||||
| 05 |
 |
2 × 3 × 315 s | ⋯ | ⋯ |
| 06c |
 |
2 × 3 × 315 s | ⋯ | ⋯ |
| 07 |
 |
⋯ | ⋯ | 2 × 6 × 125 s |
| 08 |
 |
2 × 3 × 315 s | ⋯ | ⋯ |
| Total exposure | 11, 340 s | 1764s | 1500 s | |
Notes:
b
The ORIENTAT parameter denotes the telescope roll angle using the angle the detector y axis makes with North (Sohn 2019).
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