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Night Report 2015-02-11

Observers: Sylvain Baumont, Paula Zelaya
TAT: Joe Anderson, Nancy Elias-Rosa

Clear night, low wind, humidity 60% .
Photometric night.

(times are in UT)

CALIBRATIONS:

 - Evening : EFOSC_bias, EFOSC_DomeFlat, EFOSC_FlatSpec, EFOSC_SpecArc.
 - 22:20  DOME OPEN  
 - 23:56  EFOSC_SkyFlat_BVRi  
               (the last of the 6 i-band images shows stars, and shoudn't be used)
 - 09:15  Twilight. Dome closed.

SCIENCE OBSERVATIONS :
--- EFOSC ---

 - 00:15  focus
 - 00:25  STD GD71 : Gr11, Gr13, Gr16
 - 00:35  image analysis

 - 01:03  MASTERJ072940.10+141425.5 CLASSIFICATION : Gr13/300s, slit 1", airmass 1.54, seeing 0.76"
               => SN-II +1week, z ~ 0.03 (No emission line from the galaxy visible on 2D spectrum, 40pix left of SN)

 - 01:16  ASASSN-15be FOLLOW-UP : Gr11/1500s, Gr16/1500s, slit 1", airmass 1.4, seeing 0.65"

 - 02:26  OGLE-2015-SN-051 CLASSIFICATION : Gr13/900s, slit 1", airmass 1.3, seeing 0.65"
               => SN-Ia, +5days, z ~ 0.06 (maybe 91T-like)
 
 - 02:49  image analysis

 - 02:55  MASTERJ053953.61-275546.5 CLASSIFICATION : Gr13/180s, slit 1", airmass 1.1, seeing 0.66"
               => Blue continuum, hydrogen Balmer absorption lines, probably galactic. No good SNID fit.
 - 03:04  PSNJ10544216-2104138 CLASSIFICATION : Gr13/300s, slit 1", airmass 1.35, seeing 0.72"
               => SN-Ia-pec (02cx+10d or 05cc+5d), z ~ 0.02
 - 03:22  OGLE-2015-SN-043 CLASSIFICATION : Gr13/1500s, slit 1", airmass 1.5, seeing 0.65"
               => Noisy spectrum, broad emission line at 7500A, possibly SN-II post-max, z ~ 0.14

 - 03:56  STD L745a : Gr11, Gr13, Gr16

 - 04:19  LSQ14mo FOLLOW-UP : Optical photometry ri 12x200s, airmass 1.05, seeing 0.7"
               (Both r and i sequences were aborted after 6 exposure, due to guiding star out off reach when jittering.
                At 05:22, we started another OB of 6x200s to complete the sequences, same problem in r-band after 2 images.
                At 06:05, we took 6 more r-band images. Finally we have two identical sequence of 6 offsets in r and i, plus 2 r-band images. 
                TO NEXT OBSERVERS : The T.O. suggest, in such case, to use NTT tracking instead of auto-guiding)

 - 06:33  Photometric Standard Field PG1047 : UBVRigrz

 - 06:40  LSQ15gv CLASSIFICATION : Gr13/1500s, slit 1", airmass 1.1, seeing 0.8-1.1"
               => SN-Ia +1week, z ~ 0.12 (possible OII line at 4100A => z=0.10)

 - 07:13  STD LTT3864 : Gr11, Gr13, Gr16

 - 07:26  LSQ15ey CLASSIFICATION : Gr13/1500s, slit 1", airmass 1.2, seeing 1.3-0.9"
               => SN-II +1week, z ~ 0.035

 - 07:58  ASASSN-15bd FOLLOW-UP : Gr11/1500s, Gr16/1500s, slit 1", airmass 2.1, seeing 0.9-0.6"

----------------------------------------------

CONCLUSIONS :

MASTERJ072940+141425 : SN-II +1week, z ~ 0.03
OGLE-2015-SN-051         : SN-Ia +5days, z ~ 0.06
MASTERJ053953-275546 : Blue continuum + Balmer lines, Galactic star?
PSNJ10544216-2104138 : SN-Ia pec +1week, z ~ 0.02
OGLE-2015-SN-043        : possibly SN-II post-max, z ~ 0.14
LSQ14gv                          : SN-Ia +1week, z ~ 0.12
LSQ15ey                          : SN-II +1week, z ~ 0.035
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