Night Report 2015-03-12
Observer : Morgan Fraser
Support team : Southampton (Mat Smith and others)
TAT : Joe Anderson, Cosimo Inserra
Start of night: Haze visible, some clouds on the horizon to the W. 2 m/s wind, 55% humidity
Moon from 03.40 onwards at 55% illumination
End of night: Some thin cirrus visible in second half of the night. Wind 5 m/s, humidity 60%
Seeing: 1" at start of night, subarcsecond seeing for most of the night (with a couple of spikes to 1-1.2" on the DIMM)
Excellent seeing all night, so I concentrated on imaging followup. No classifications - had a
full schedule of critical/important follow-ups.
Afternoon calibrations: SOFI imaging flats, arcs and specflats
23.33 SOFI focusing
23.40 SOFI Standard LTT 3218
SOFI JHK imaging, BG+RG spectra
00.24 End twilight
01.05 Hip019052 (Telluric standard for PSNJ07361576-6930230
01.12 Switch to EFOSC, focussing
BVRi imaging (6x150s B, 3x200s VR). Seeing measured at 1" at start of sequence
Some images show slight elipticity in PSF, but they are still useable.
02.26 Image analysis.
griz imaging - note that gr images will be in darktime, iz images will be taken just as
moon is coming up. But for these filters and moon phase, the difference in sky brightness
is <0.2 mag/arcsec, so it should be ok. Seeing is 0.6" in g' images at start of sequence.
1500s Gr#11, 900s Gr#16
Calibration unit did not move after Gr#16 spectrum, so first internal flat is of the SN.
TO put calibration unit in manually, and re-did flats.
05.15 LTT3864 standard
2x1500s Gr#11 followup
3x300s U, 1x200s B, 1x90s V imaging (source visible in all bands)
2x1800s Gr#11 spectroscopy (started at 06.50), S/N good
BVRi imaging, SN clearly detected in all bands
Gr#13 followup, 2x1500s. Good S/N in spectra.
1x1500s Gr#11, 1x1200s Gr#16 followup
09.21 Start twilight
Too bright for a standard