Night Report 2015-03-10
Observers : Morgan Fraser
Support team : Southampton (Mat Smith and others?)
TAT : Joe Anderson, Cosimo Inserra
Start of night: clear sky, but with some haze towards the horizon, 5 m/s wind, 35% humidity
Moon from 02.10 onwards at 75% illumination
End of night: clear sky, no clouds, 1km/s wind, no clouds
Seeing ~<1" throughout night
As this is the brightest night of the subrun, the plan was to start with EFOSC to do the time critical followup target OGLE-073 before the moon was up; then concentrate on SOFI observations for most of the night; before switching back to EFOSC2 at the end of the night for some bright classification targets (when all NIR targets were below airmass 2).
Afternoon calibrations: EFOSC_bias, EFOSC_FlatSpec, EFOSC_SpecArc
23.27 UVi skyflats
23.54 Spectrophotometric standard LTT745a
Gr#13 classification - SN Ia
Took 30s acquisition image, used PESSTOEFOSCPHOT to check astrometry.
Nothing obvious at position of SN, so aborting spectra and taking BVRi imaging instead.
Faint source present in all bands in imaging
Gr#13 classification. Blue and featureless spectrum, with superimposed narrow Halpha,
Hbeta and Oi 5007 lines at z=0.10. Abs mag at this redshift is -20.2.
02.02 Moon up - switch to SOFI
02.09 Switchover complete, starting image analysis
JHK imaging (seeing <1")
06.48 Hip077338 Telluric std
Due to elevation, I couldn't get JHK imaging for flux cal. I will get this at the start of tomorrow night.
HIP090574 Telluric std Not used, double star
HIP090869 Telluric std
08.40 EG274 flux standard
08.52 Switch back to EFOSC2 (delay as one of the systems froze)
Skipping image analysis as it would take too long, so PSF is not great. Should be ok for spectra though.
Gr#13 classification, CV
Gr#13 classification, blue and fairly featureless - perhaps some weak narrow lines?
Gr#13 classification, Ibc at z=0.02?
09.46 LTT7379 standard
LSQ15st Aborted after acquisition - too bright
10.02 BR skyflats