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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

23.12    Sunset

23.33    SOFI focusing

23.40    SOFI Standard LTT 3218

23.49    PSNJ07361576-6930230
             SOFI JHK imaging, BG+RG spectra

00.24    End twilight

01.05    Hip019052 (Telluric standard for PSNJ07361576-6930230      

01.12    Switch to EFOSC, focussing

01.21    ASSASN-14ha
             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.
02.34    LSQ14bdq
             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

05.28    PS15br
             2x1500s Gr#11 followup

06.20    SN2015D
             3x300s U, 1x200s B, 1x90s V imaging (source visible in all bands)
             2x1800s Gr#11 spectroscopy (started at 06.50), S/N good

07.55    PSNJ14095513+1731556
             BVRi imaging, SN clearly detected in all bands

08.15    LSQ15rw
             Gr#13 followup, 2x1500s. Good S/N in spectra.

09.11    ASASSN-15bd
             1x1500s Gr#11, 1x1200s Gr#16 followup

09.21    Start twilight

             Too bright for a standard
             U skyflats

10.33    Sunrise