Table 2
Logbook of the spectroscopic observations of KIC 4931738 – grouped by observing runs.
| Instrument | N | BJD first | BJD last | ⟨ S/N ⟩ | S/Ni | T exp | R | Observer (PI) |
|
|
||||||||
| ARCES | 2 | 2 456 058.93319 | 2 456058.95585 | 102 | [100, 103] | 1800 | 31 500 | JJ, JMK |
| Isis | 1 | 2 456 087.72276 | 101 | [88, 113] | 700 | 22 000 & 13 750a | SB (JS) | |
| HAMILTON | 3 | 2 456 132.77847 | 2 456 134.76473 | 53 | [47, 57] | 1800 | 60 000 | JS, KIC |
| FIES | 7 | 2 456 146.45631 | 2 456 148.62473 | 73 | [29, 84] | [391, 2400] | 25 000 | ATH (KU) |
| HERMES | 19 | 2 456 156.51739 | 2 456 166.57275 | 32 | [29, 36] | [2700, 3400] | 85 000 | PIP |
| HERMES | 6 | 2 456 173.48004 | 2 456 183.38340 | 32 | [30, 33] | [2200, 2800] | 85 000 | PMA |
| HERMES | 2 | 2 456 195.50221 | 2 456 200.52468 | 31 | [29, 34] | 2700 | 85 000 | PB |
Notes.For each observing run, the instrument, the number of spectra N, the BJD of the first and last exposure, the average signal-to-noise level, the range of S/N values (where the S/N of one spectrum is calculated as the average of the S/N measurements in the line free regions of 4185 Å to 4225 Å, 4680 Å to 4710 Å, 5110 Å to 5140 Å, 5815 Å to 5850 Å, 6180 Å to 6220 Å, and 6630 Å to 6660 Å), the typical exposure times (in seconds), the resolving power of the spectrograph, and the initials of the observer (and the PI if different) are given.
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