Sequence for the spectral observations from VLT/VISIR.
|Date||Time (UT)||Measurement||Target Airmass||Seeing (arcsec)|
|2009-07-26||04:35-04:42||Acquisition of star HD 200914|
|04:44-05:18||Calibration of MR spectra||1.019||1.27′′|
|05:27-05:59||Acquisition of Impact site at 10.0 μm|
|06:01-06:10||MR Spectrum 7.9–8.1 μm||1.018||1.12′′|
|07:30-07:40||Acquisition of Impact site at 10.0 μm|
|07:44-07:52||HRX spectra of impact||1.092||1.05′′|
|07:59-08:03||Acquisition of star HD 200914|
|08:06-08:15||Calibration of HRX spectra||1.221||0.98′′|
|2009-08-12||06:59-07:03||Acquisition of impact site at 10.0 μm|
|07:04-07:13||MR 8.0 μm spectrum||1.69||0.57′′|
|08:13-08:21||Acquisition of star HD 200914|
|08:23-08:57||Calibration of MR spectrum||1.69||0.59′′|
|2009-08-13||02:08-02:26||Acquisition of impact site at 10.0 μm|
|02:28-02:37||HRX spectra of impact||1.22||0.91′′|
|02:44-2:48||Acquisition of star HD 200914|
|02:51-02:59||Calibration of HRX spectra||1.07||0.97′′|
Notes. Seeing estimates in the final column are for visible wavelengths reported for each spectral observation.
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