Open Access
Table 1
The observational star sample.
| CRIRES observations | Optical observations | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Object | Sp.type | V(a) | B–V(a) | J(b) | Date | Exp. time | S/N | Date | Exp. time | S/N |
| (mag) | (mag) | (mag) | YYYY-MM-DD | (s) | YYYY-MM-DD | (s) | ||||
| HD 183143 | B7 Iae | 6.839 | 1.185 | 4.179 | 2014-05-27, 2014-06-13, 2014-06-23 | 60-90 | 200-500 | 2013-08-18 | 720 | 500 |
| 2014-06-24, 2014-06-28 | ||||||||||
| HD 165784 | A2 Iab | 6.538 | 0.865 | 4.643 | 2014-05-26, 2014-06-17, 2014-06-23 | 60-90 | 200-500 | 2007-07-09 | 140 | 180 |
| 2014-06-24, 2014-07-04, 2014-07-06 | ||||||||||
| 2014-07-07, 2014-07-08, 2014-07-14 | ||||||||||
| HD 92207 | A0 Iae | 5.476 | 0.500 | 4.129 | 2007-05-09, 2007-05-10 | 8-12 | 180-280 | 2013-05-10 | 500 | 400 |
| HD 111613 | A1 Ia | 5.741 | 0.318 | 4.737 | 2007-05-10 | 15-25 | 200-300 | 1999-01-23 | 600 | 400 |
| HD 87737 | A0 Ib | 3.486 | -0.026 | 3.499 | 2007-05-10 | 10 | 200-300 | 1999-01-21 | 120 | 440 |
Notes. The first four stars are employed for DIB measurements, the fifth is an unreddened standard star.(a)Mermilliod (1997) (b)Cutri et al. (2003).
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