Night Report 2015-01-15
Observers: Christoffer Fremling, Anders Nyholm
TAT: Annalisa de Cia, Morgan Fraser
No high clouds at the start of the night, but somewhat hazy. humidity of ~30%. Seeing~0.94”. Will attempt EFOSC photometry and spectroscopy. Mostly classifications, but also some photometric followup planned. EFOSC was periodically having trouble with the focus due to internal temp. fluctuations.
(times are in UT)
CALIBRATIONS:
- 17.50: PESSTO_bias, PESSTO_calib
- 23:54: Sunset
- 00:18: Flat fields BR
SCIENCE-OBSERVATIONS:
EFOSC observations
- 00:58 SN2014cx, Airmass=1.5, Seeing=0.78”
Comment: Phot 10x100 R, seeing started at 0.7” but increased and was over 1” in the last ~3 exposures
- 01:15 STD field T_Phe_UBVRi
- 01:22 SN2014cx, Airmass=1.63, Seeing=0.73”
Comment: Phot 9x100 R dither, to make sure we get 10 good seeing images in total. Seeing was stable ~0.7-0.8” during this OB
- 01:47 OGLE21, Class. gr13, Airmass=1.49, Seeing=0.69”
Comment: Ia-91T, -3d, z=0.085
- 02:25 OGLE05, Class. gr13, Airmass=1.53, Seeing=0.76”
Comment: IIP +30d, z=0.047, SNID also matches II-Pec ~-50d, i.e. 87a-like
- 02:51 OGLE14, Class. gr13, Airmass=1.47, Seeing=0.76”
Comment: SNID Ic +13 or Ia +60 z=0.06-0.07, Gelato says type II, e.g. 1993J at max and z=0.062, class. unclear
- 03:24 OGLE10, Class. gr13, Airmass=1.6, Seeing=0.71”
Comment: spectrum looks like a star, CV?
- 03:59 OGLE01, Class. gr13, Airmass=1.x, Seeing=0.7x”
Comment: Difficult to trace, but most likely Ia-norm z=0.051 +9d SNID
- 04:34 OGLE12, Class. gr13, Airmass=1.39, Seeing=0.76”
Comment: Ia z=0.19 +5d SNID
- 05:21 OGLE20, Class. gr13, Airmass=1.7, Seeing=0.57”
Comment: strong galaxy contamination but narrow H-alpha (also in 2d frame), IIn?
- 05:52 OGLE17, Class. gr13, Airmass=1., Seeing=0.68”
Comment: Ia z=0.09 -7d SNID
- 06:35 MASTER07, Class. gr13, Airmass=1.35, Seeing=0.65”
Comment: CV
- 06:45 LSQ15ck, Class. gr13, Airmass=1.07, Seeing=0.61”
Comment: IIP z=0.04 +3d SNID
- 07:27 STD star l745, Airmass=1.38, Seeing=0.49”
- 07:55 LSQ15cj, Class. gr13, Airmass=1.1, Seeing0.60”
Comment: Ic, SNID match to sn2004aw, z=0.05 +20d
- 08:40 LSQ15dh, Class. gr13, Airmass=1.04, Seeing=0.56”
Comment: IIP z=0.04 +10d SNID & Gelato (gelato phase robust at ~+10)
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SCIENCE-CONCLUSIONS:
with EFOSC:
Followup
- SN2014cx, R-band imaging to investigate the SN environment
Classification
- OGLE21, Ia-91T, -3d, z=0.085
- OGLE05, IIP +30d, z=0.047, SNID also matches II-Pec ~-50d, i.e. 87a-like
- OGLE14, classification unclear, most likely Ia
- OGLE10, CV
- OGLE01, Difficult to trace, but most likely Ia-norm z=0.051 +9d
- OGLE12, Ia z=0.19 +5d
- OGLE20, strong galaxy contamination but narrow H-alpha (also in 2d frame), IIn?
- OGLE17, Ia z=0.09 -7d
- MASTER07, CV
- LSQ15ck, IIP z=0.04 +3d
- LSQ15cj, Ic well matched to sn2004aw, z=0.05 +20
- LSQ15dh, IIP z=0.04 +10d