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 23.54 Spectrophotometric standard LTT745a 00.04 PSNJ07361576-6930230 Gr#13 classification - SN Ia 00.20 OGLE-2014-SN-073 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 01.42 PS15br 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 02.20 ASASSN-14ko JHK imaging (seeing <1") 02.44 OGLE-2014-SN-073 JHK imaging 03.59 PS15ae JHK imaging 05.15 PS15ae BG spectroscopy 06.48 Hip077338 Telluric std 06.53 PSNJ10544216-2104138 BG spectroscopy Due to elevation, I couldn't get JHK imaging for flux cal. I will get this at the start of tomorrow night. 08.27 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. 09.04 ASASSN-15ek Gr#13 classification, CV 09.16 MASTERJ135329.90-421622.5 Gr#13 classification, blue and fairly featureless - perhaps some weak narrow lines? 09.19 Twilight 09.34 PSNJ20580766-5147074 Gr#13 classification, Ibc at z=0.02? 09.46 LTT7379 standard 09.57 Gr#13 classification 10.02 BR skyflats 10.32 Sunrise |