Night report 2014-02-21

Observers: Morgan Fraser, Heather Campbell

Support team: Nadia Blagorodnova, Nic Walton

TAT: Nancy Elias-Rosa, Annalisa De Cia

General comments:

Concentrated on followup targets, only one new classification, plus one revisit to ambiguous classification from Feb 19. Spectrophotometric standard not taken at start of the night, as we had a large number of important followup targets which set early in the night.

Weather:

Moon: 55% illumination, UT 03.30 onwards

Non-photometric

Humidity 20-40%, wind <5miles per hour, some haze visible at sunset

Seeing 1" or better throughout night (from DIMM and measured off images)

Observations:

23.32 Start of twilight

BR skyflats, TO performed image analysis

00.21 SMTJ01353283-5757506

1x1200s Gr#16 followup

00.47 End of twilight

00.57 LSQ12dlf

12x200s V-band imaging. Up to ~1.5" FWHM measured on images (seeing from DIMM was ~1", but observations were taken between airmass 2 and 3).

01.50 SN2013gr

2x1800s Gr#13 followup

03.00 LSQ14an

4x1800s Gr#16 followup. First 2x1800s exposures taken, then internal flats, then new acquisition image, another 2x1800s exposures, internal flats again.

05.27 Spectrophotometric standard LTT3864

05.50 OGLE-2014-SN-012

Revisited for longer classification spectrum, 2x1800s with Gr#13. Quick reduction still looks blue and (mostly?) featurless.

06.57 LSQ14vv

Gr#13 classification spectrum. Very blue, with narrow Balmer emission at z = 0.077. Halpha is fitted with a Lorentzian of FWHM ~1400 km/s. Also emission feature at ~5890 rest frame - could this be HeI? Absolute mag is now -18.7, but transient continues to rise. No clear offset from host - potentially nuclear

07.25 LSQ14pt

3x1800s Gr#16 followup spectra

09.05 Start of twilight

09.10 Spectrophotometric standard EG274

09.34 LSQ14vr

Classification target - stellar variable.

09.55 rz skyflats