Night Report Page - 20121107

The previous night we noticed a possible misalignment of grism13 (~13pixel of displacement along the CCD in the dispersion direction), so we sent a new setup form in order to ask a check of the wheels elements. For this, we had to get a new set of calibration (arcs and dome flat fields) in addition to those obtained at the beginning of the subrun.

During the afternoon, we fixed the problem with the spectropolarimetric OBs and took new calibrations.

Cirrus and thin clouds at the beginning of the night. Clear sky at the end. No major problem apart for the spectropolarimetry.

Seeing 0.8-1"


Skyflats g

UT23:45 HD13588 unpol STD 2D spectra looked too faint, possibly because of the cirrus. We increased the exposure time of the OB up to 12 times than what foreseen, keeping getting a very low signal. TOs suggested an even more long exposure time for the gm13 setup. Since the planned 3h of exposures seemed to be not enough to get useful spectropolarimetric data of SN2012fr this night, we decided to skip it for this subrun. CHECK carefully exposure times for the next runs. THE DAY AFTER: the problem was most probably in the binning of the through-slit image acquired in the afternoon, that gave us the wrong position on the slit for the source

UT00:45 Feige110-STD g11,g13,g16

UT01:02 SN2012dy g16

UT02:20 SN2009ip g11,g16, UBVRi

UT03:20 LSQ12dyw UVBRi,g13

UT04:52 OGLE-2012-SN-027 CLASS [SNID: SNIa z=0.24 at max ??]

UT05:28 LSQ12gak CLASS [Likely too faint: No SN identified in the acquisition image]

UT05:46 SN2012fr UBVRi,g11,g16

UT06:07 CHASE_ESO-9015 CLASS [SNID: SNIIP z=0.009 136d]

UT06:22 OGLE-2012-SN-029 CLASS [no SN identified in the acquistion image, too faint]

UT06:30 EG21-STD g11,g13,g16

SOFI (UT06:40)---

UT06:50 SN2012fr JHK and BG,RG

UT08:07 Hip012167-Telluric BG,RG

UT08:13 LTT3218-Flux BG,RG