Night report page - 20130411

Observers: Stefan Taubenberger, Stephan Hachinger

Data reduction team: Nancy Elias-Rosa, Antonia Morales-Garoffolo

1st night of 2nd subrun (only SOFI).

All observations turned out to be good quality unless noted otherwise (**).

initial weather cond: humidity ~40%, wind <5m/s, ~clear sky

middle-of-night weather cond: humidity ~50%, wind ~5m/s, ~clear sky

late-night weather cond: humidity ~30%, wind ~5m/s, ~clear sky

UT 23:30 start of night with SOFI

--- seeing image 1.2..2.0'' (!), DIMM >~1.0'' ---

UT 23:30 followup OGLE-2012-SN-006 airmass=1.9 JHK

** in J some electronic noise.

** in H first try with 18sec exptime (20sec suggested in template block):

too high sky bg. Repeated and reduced H/K to 12/9 sec, respectively, incr. NDIT

accordingly. Sky remains variable.

** forgot to set name fields of indiv. exposures in OB

(thus, they are named "name_J" instead of "OGLE..._J" etc.)

--- seeing image ~1.0'', DIMM 1.0'' ---

UT 01:00 followup SN2013ak airmass=1.1 JHK

--- seeing DIMM 0.9-1.2'' ---

UT 01:20 followup SN2013ak airmass=1.2 BG/RG long_slit_1

--- seeing image 1.2'' ---

UT 02:20 tellstd Hip043141 airmass=1.2 BG/RG long_slit_1

* telluric standard for SN2013ak

--- seeing DIMM 0.9'', image 0.8'' ---

UT 02:30 followup SN2013am airmass=1.4 JHK

--- seeing DIMM 0.8'' ---

UT 02:50 followup SN2013am airmass=1.5 BG/RG long_slit_1

--- seeing DIMM 0.9'' ---

UT 05:00 tellstd Hip048072 airmass=1.5 BG/RG long_slit_1

* telluric standard for SN2013am

--- seeing image 1.5'' ---

UT 05:10 followup SN2013K airmass=1.8 JHK

* reduced K somewhat from last subrun (b/c of good image quality),

but still 2 (stacked) exposures

--- seeing image 1.1'' ---

UT 06:05 std EG274 airmass=1.1 BG/RG long_slit_1

--- seeing image 1.2''..1.3'' ---

UT 06:15 followup SN2012ca airmass=1.2 JHK

--- seeing image 1.2''..1.3'', DIMM 0.8''..1.2'' ---

UT 07:30 followup PSN J15213475-0722183 airmass=1.1 JHK

** J-band

first two images with J photometry scrambled out of reasons unknown

- reset OB after images #1-#4 (out of which #3 and #4 ok)

- images #5-#16 are a regular sequence of 12 images which are sufficient for

J photometry when co-added

- after image #16 block was aborted b/c S/N already considered sufficient

(one image #17 was still running and completed)

* H-band and K-band

- started after sufficient J S/N obtained, with own OBs respectively. Success.

--- seeing DIMM 1.0'', image 1.5'', both with strong oscillations ---

UT 08:40 followup SN2009ip airmass=1.9 JHK

* observed ~ from "SN higher than NTT pointing limit" into the twilight

** H/K-band affected by bad seeing (measured ~2.0'') -> only marginal det.

UT 10:00 end of night