Night report page - 20130417

Observers: Stefan Taubenberger, Stephan Hachinger

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

1st night of 3rd subrun (only SOFI).

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

Note: airmass values are estimates based on visibility chart (exact vals pls see files) -- this has been the same in our other night reports.

initial weather cond: humidity ~18%, wind ~9m/s, ~clear sky

middle-of-night weather cond: humidity ~17%, wind ~11m/s...5m/s, ~clear sky

late-night weather cond: humidity ~20%, wind ~4m/s, ~clear sky

afternoon: specflat and SpecArc cal. blocks excecuted again (had time)

UT 23:15 start of night with SOFI

UT 23:30 std. GD71 airmass=2.0 BG/RG long_slit_1

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

UT 23:40 followup OGLE-2012-SN-006 airmass=2.1 JHK

UT 01:05 followup SN2013ak airmass=1.1 JHK

--- seeing image 0.8'', DIMM 0.7'' ---

UT 01:25 followup SN2013ak airmass=1.3 BG/RG long_slit_1

--- seeing image 0.8'', DIMM 1.1'' ---

UT 02:45 tellstd Hip043141 airmass=1.3 BG/RG long_slit_1

* telluric standard for SN2013ak

UT 02:50 tellstd Hip060074 airmass=1.5 BG/RG long_slit_1

* telluric standard for SN2013am #1 (2 times same standard, "synchronous" in airmass)

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

UT 03:00 followup SN2013am airmass=1.4 JHK

UT 03:30 followup SN2013am airmass=1.6 BG/RG long_slit_1

UT 05:20 tellstd Hip060074 airmass=1.6 BG/RG long_slit_1

* telluric standard for SN2013am #2 (2 times same standard, "synchronous" in airmass)

UT 05:30 followup SN2013K airmass=1.8 JHK

* used galless90sec pattern (marginally possible) to save time -> decent imaging + BG

spec possible

--- seeing image 0.9'', DIMM 0.6'' ---

UT 06:05 followup SN2013K airmass=1.8 BG

** tried spec -- low S/N: Turns out that object moved out of the slit after 3rd-4th

subexposure. Reason unknown (guiding ok??), but has never been the case in any other

obs. of this run.

UT 07:55 tellstd Hip107010 airmass=1.8 BG long_slit_1

* telluric standard for SN2013K

UT 08:00 tellstd Hip109796 airmass=2.1 BG long_slit_1

* telluric standard #1 for SN2009ip

--- seeing image 0.9'', DIMM 0.6'' ---

UT 08:10 followup SN2009ip airmass=1.8 BG

* observed into the twilight

--- seeing DIMM 0.6'' ---

UT 10:15 tellstd Hip114112 airmass=1.4 BG long_slit_1

* telluric standard #2 for SN2009ip

UT 10:30 end of night