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Night Report 2015-02-17

Observers : Laurent Le Guillou, Sylvain Baumont, Ayan Mitra
Support team : Nicolas Chotard, Pierre François Leget
TAT : L. Galbany, M. Fraser

Clear sky, low wind, 50% to 40% humidity, new moon.
Photometric night, seeing down to 0.4".

(times are in UT)

CALIBRATIONS :
 - Evening : EFOSC_bias, EFOSC_FlatSpec, EFOSC_SpecArc
   - 23:56 :  EFOSC_SkyFlat BVRi

SCIENCE OBSERVATIONS :

--- EFOSC ---

 - 00:25  RU152 Photometric Standard Field, UBVRigrz
        48% humidity, temperature 14.7º, airmass 1.27, seeing 0.97"

 - 00:40  OGLE-2015-SN-043 Follow-up, 3x300s B, 3x200s VRi

 - 01:41  STD L745a, Gr11, Gr13, Gr16

 - 01:58  PG1047 Photometric Standard Field, UBVRigrz
        45% humidity, temperature 15.2º, airmas 2.05, seeing 0.6"

 - 02:08  OGLE-2015-SN-035 Follow-up spectrum, 2x1800s Gr13

 - 03:17  LSQ15lj Classification, 1500s Gr13
        => SN-Ia +1week, z ~ 0.15 (maybe peculiar, 06gz-like)

 - 03:49  LSQ14an Follow-up photometry, 6x200s BVRi dithered.

 - 05:30  PG1047 Photometric Standard Field, UBVRigrz
        51% humidity, temperature 14.6º, airmass 1.15, seeing 0.41"
 - 05:34  image analysis to correct a bit of coma and astigmatism.
 - 05:42  STD LTT3864, Gr11, Gr13, Gr16

 - 06:02  CSS141223-113342+004332 Classification spectrum, 900s Gr13
        => SN-Ic?, pre-max, z ~ 0.13
 - 06:21  PS15aw Classification, 1200s, Gr13
        => SN-Ia, pre-max, z ~ 0.09 
 - 06:46  LSQ15mj Classification, 1200s Gr13
        => SN-II?, blue continuum, possible broad Balmer P-Cygni.
           Galactic Halpha & OIII at z=0.024
 - 07:16  LSQ15mc Classification, 2700s Gr13
        => SN-II, young, z ~ 0.055

 - 08:08  ASASSN-15bd Follow-up spectra, 2x1500s Gr11 & Gr16

 - 09:11  STD EG274, Gr11, Gr13, Gr16

 - 09:24  PSNJ19235601-5955321 Classification, 300s Gr13
        => SN-Ia +1 month, z ~ 0.015

CONCLUSIONS :

 LSQ15lj : SN-Ia +1week, z ~ 0.15, maybe 06gz-like
 CSS141223-113342+004332 : SN-Ic?, pre-max, z ~ 0.13
 PS15aw  : SN-Ia, pre-max, z ~ 0.09
 LSQ15mj : SN-II?, z_gal = 0.024
 LSQ15mc : SN-II, young, z ~ 0.055
 PSNJ19235601-5955321 : SN-Ia +1 month, z ~ 0.015

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