Night Report 2015-03-13
Observer : Morgan Fraser
Support team : Southampton (Mat Smith and others)
TAT : Joe Anderson, Cosimo Inserra
Start of night: Thin cirrus, 2 m/s wind, 65% humidity
Moon from 04.30 onwards at 45% illumination
End of night: Can't see any clouds at dawn, 5 m/s wind, 60% humidity
Seeing: Measured 1" in V at 01.15, subarcsecond for most of night.
Lost ~1hr total due to technical issue with rotator (not caused by going to zenith - this is
an intermittent fault which has started happening over the last couple of months).
Afternoon calibrations: SOFI arcs and specflats
23.25 HIP 016853 (Telluric standard for PSNJ07361576-6930230 )
SOFI JHK imaging, BG+RG spectra
00.23 End twilight
00.55 Switch to EFOSC
01.04 GD71 (standard)
01.21 Telescope error - system restated
BVRi imaging, seeing ~1" at start of sequence
Telescope error after first OB (03:17). Problem is connected to rotator, ESO are
aware of this as an intermittent issue, but do not know the cause yet.
Calibration unit for internal flats did not move, TO had to insert manually.
2x1800s Gr#11 (taking Gr#16 later when target has passed zenith to avoid rotator limit)
07.06 - Second OB ended early after ~1700s due to telescope error (this was not due to
being too close to zenith - elevation was <80 deg when problem occured).
09.34 EG274 (standard)
Gr#13 classification, Ia, z=0.07, a few days post max.
Gr#13 classification, only got 300s as sky was getting brighter.
Ia, z=0.06, post max (best fitting templates are pre-max, but LC is clearly post-peak)
10.34 Sunrise (too bright for skyflats)