Night Report 2015-02-10

Observers: Sylvain Baumont, Paula Zelaya

TAT: Joe Anderson, Nancy Elias-Rosa

Clear night, low wind, humidity from 75% to 50% .

CALIBRATIONS:

- Evening : EFOSC_bias, EFOSC_FlatSpec, EFOSC_SpecArc,

SOFI_FlatJHK, SOFI_BG_Flat+Arc, SOFI_RG_Flat+Arc.

- 22:20 DOME OPEN

- 23:56 EFOSC_SkyFlat_BVR (last 'i' band sky flat shows some stars)

- Morning 09:xy : EFOSC_SkyFlat_iRVB

--- EFOSC ---

SCIENCE OBSERVATIONS:

- 00:25 STD L754a : Gr11, Gr13, Gr16

- 00:40 image analysis : failed to find a bright star around the STD field and too poor seeing.

- 00:47 focus

- 01:10 OGLE-2015-SN-035 FOLLOW-UP : Gr13/2x1800s, slit 1", seeing unstable 1.0-2.0", airmass 1.26

- 02:12 image analysis

- 02:30 ASASSN-14ha FOLLOW-UP : Bi/2x150s, VR/200s, seeing 0.8-1.4"

(Beware : bright row due to electronic on EFOSC_Image042_0005.fits, but away from object)

- 03:05 OGLE-2014-SN-073 FOLLOW-UP : B/3x350s, VRi/2x250s, seeing 0.8-0.7"

- 04:05 OGLE-2015-SN-052 CLASSIFICATION : Gr13/1500s, slit 1", seeing 0.7", airmass 1.5. Noisy spectrum.

Possibly SNII +3d, z ~ 0.07 , broad features around 5100A and 7000A.

- 04:50 STD L754a : Gr11, Gr13, Gr16

- 05:10 LSQ15hj CLASSIFICATION : Gr13/1500s, slit 1", seeing 0.6", airmass 1.1

Blue spectrum, many broad features. Poor match to Ic-pec 98bw at max, z ~ 0.07.

- 05:49 LSQ15hy CLASSIFICATION : Gr13/900s, slit 1", seeing 0.5", airmass 1.1

Red galactic spectrum, extended narrow Halpha emission at 7160A, z ~ 0.09

- 06:13 LSQ15gp CLASSIFICATION : Gr13/1500s, slit 1", seeing 0.55", airmass 1.08

Probably a SN-Ia +10days, z ~ 0.085

- 06:47 ASASSN-14lp FOLLOW-UP : Gr11/1500s, Gr16/1500s, slit 1", seeing 0.55", airmass 1.2, 30º from the Moon

- 07:56 STD LTT3864 : Gr11, Gr13, Gr16

- 08:15 Attempt of LSQ15ey classification spectrum, only 9º from the moon => aborted!

- 08:22 CSS150128-151522+170037 CLASSIFICATION : Gr13/900s, slit 1", seeing 0.8", airmass 1.7

SN-II, post max, z ~ 0.08

CONCLUSIONS :

OGLE-2015-SN-052 : SN-II, +3d, z ~ 0.07

LSQ15hj : SN-Ic-pec (98bw), at max, z ~ 0.07

LSQ15hy : galaxy, z ~ 0.09, no clear SN signal

LSQ15gp : SN-Ia +10days, z ~ 0.085

CSS150128-151522+170037 : SN-II, post max, z ~ 0.08