Night Report 2015-02-12

Observers : Sylvain Baumont, Paula Zelaya

TAT : Joe Anderson, Nancy Elias-Rosa

We did mainly follow-up observations with EFOSC, and classified two SN-Ia.

Clear sky, low wind, below 50% humidity.

Photometric night.

(times are in UT)

CALIBRATIONS :

- Evening : EFOSC_bias, EFOSC_FlatSpec, EFOSC_SpecArc

- 22:00 : Dome OPEN

- 23:56 : Attempt to get EFOSC_SkyFlat

- 00:05 "NTT tracking control" issue => failed to complete SkyFlat sequence.

- 00:16 It's official, "WE HAVE A PROBLEM !"

- 09:xy : EFOSC_SkyFlat

SCIENCE OBSERVATIONS :

--- EFOSC ---

- 00:48 Attempt to get STD GD71 : EFOSC "severe error"

The rotator encoder failed due to heat. Shut down for 30'. Reboot.

- 02:14 EFOSC is back ! (2h lost, but the seeing was >1" :P )

No image analysis is needed, from Acq image.

- 02:15 LSQ14gqk FOLLOW-UP : Gr13/3x1500s, slit 1", airmass 1.4-1.7, seeing 1.0-1.4"

- 03:45 Photometric Standard Field PG1047 : UBVRigrz, airmass 1.37, seeing 0.95"

- 04:01 LSQ14efd FOLLOW-UP : B/3x300s, VRi/3x200s, airmass 1.9-2.3, seeing 0.8"

- 04:58 LSQ15im CLASSIFICATION : Gr13/900s, slit 1", airmass 1.4, seeing 0.8"

=> SN-Ia +1week, z ~ 0.075

- 05:14 Photometric Standard Field RU152 : UBVRigrz, airmass 1.43, seeing 0.8"

- 05:26 MLS150210-102122+110418 CLASIFICATION : Gr13/1500s, slit 1", airmass 1.31, seeing 0.8"

=> SN-Ia ~max, z ~ 0.15

- 06:01 STD L745a : Gr11, Gr13, Gr16

- 06:12 PSNJ09204691-0803340 FOLLOW-UP : B/3x300, VRi/3x200s, airmass 1.2, seeing 0.9"

(Manual offset to avoid bad column at SN location)

- 07:20 ASASSN-15ba FOLLOW-UP : Gr11/2x1500s, Gr16/2x1500s, slit 1", airmass 1.4, seeing 0.8"

- 09:20 Photometric Standard Field PG1657 : UBVRigrz, airmass 1.74, seeing 0.7"

CONCLUSIONS :

LSQ15im : SN-Ia +1week, z ~ 0.075

MLS150210-102122+110418 : SN-Ia around max, z ~ 0.15