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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


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