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