Night Report 2015-02-24

Observers : Laurent Le Guillou, Sylvain Baumont, Ayan Mitra

Support team : Nicolas Chotard, Pierre François Leget

TAT : K. Maguire, J. Polshaw

We did mainly follow-up observations, with EFOSC and SOFI.

Clear sky, wind increasing from 5m/s to 10m/s, humidity from 60% down to 40%.

Moon at 1st quarter, 45% illumination, setting at 3:30.

Photometric night.

(times are in UT)

CALIBRATIONS :

- Evening : EFOSC_bias, EFOSC_FlatSpec, EFOSC_SpecArc

- 23:40 : EFOSC_SkyFlat UBVRi

- Morning : our T.O. must leave early; No morning SkyFlat.

SCIENCE OBSERVATIONS :

--- EFOSC ---

- 00:10 image analysis

- 00:20 STD GD71, Gr11 Gr13 Gr16, airmass 1.42

- 00:42 Photometric Standard Field RU152, UBVRigrz

55% humidity, temperature 13º, airmass 1.18

- 00:56 OGLE-2015-SN-043 Follow-up, B:3x500s V:3x300s Ri:2x300s

Airmass 1.4, seeing 1" to 2.4", 90º from moon

- 02:14 LSQ15ok Classification, Gr13:600s

=> SN-II pre-max, z ~ 0.01

- 02:30 STD L745a, Gr11 Gr13 Gr16, airmass 1.03

- 02:56 PSNJ10544216-2104138 Follow-up, Gr11:2x1800s, slit 1.5"

Airmass 1.2, seeing 0.8" to 1.4"

- 04:00 Photometric Standard Field PG1047, UBVRigrz

40% humidity, temperature 14º, airmass 1.2

--- SOFI ---

- 04:22 STD LTT3218, BG RG, slit 1", airmass 1.04

- 04:36 Telluric Standard HIP053497, BG RG, slit 1"

39% humidity, temperature 14.6º, airmass 1.03

- 04:44 PSNJ10544216-2104138 Follow-up, BG:4800s, slit 1"

Airmass 1.02, seeing 0.7" to 1.2"

- 06:29 Telluric Standard HIP053497, BG RG, slit 1"

40% humidity, temperature 13.6º, airmass 1.06

- 06:35 Telluric Standard HIP056242, BG RG, slit 1"

No telluric std. found close to the equator => 14º north of PS15ae

40% humidity, temperature 13.6º, airmass 1.4

- 06:44 PS15ae Follow-up, BG:4800s RG:1800s, slit 1"

Airmass 1.2 to 1.7, seeing 0.8" to 1.5"

We aborted the RG OB after 4 exposures out of 8 to keep time for the telluric.

- 09:17 Telluric Standard HIP056614, BG RG, slit 1"

No telluric std. found close to the equator => 16º south of PS15ae

42% humidity, temperature 12.9º, airmass 1.46

CONCLUSIONS :

Classification

* LSQ15ok : SN-II pre-max, z ~ 0.01

Follow-up

* OGLE-2015-SN043 BVRi

* PSNJ10544216-2104138 Gr11:2x1800s BG:4800s

* PS15ae BG:4800s RG:1800s