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"

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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