SV 11 2 » History » Version 2

Version 1 (Gary Bernstein, 11/02/2012 06:16 AM) → Version 2/7 (Gary Bernstein, 11/02/2012 06:18 AM)

h1. SV Notes for MJD 56234 (starting evening of November 2)

h2. Observers

| *Observer 1* | *Observer 2* | *Run Manager* | *SISPI Expert on Call*| *Eyeball Squad*|
| Soares Santos | Depoy | Soares Santos | Honscheid | Romer |

h2. DECam Configuration and Setup

|SISPI Configuration File| *sv.ini*|
|DECam constants |*DECAM:CURRENT*|
|Proposal ID| *2012B-0003*|
|Image Processing (Calibration)| *NCSA*|
|Image Processing (First Cut)|*NCSA*|

h2. Almanac

Twilight ends 21:34, 21:33, middle of night to hand over to community SV at 01:26

Moonrise at 23:24, 84% 22:37, 90% illuminated, 54 46 degrees away from our Mini-Survey field on Stripe 82.

h2. Weather Conditions

* [[Tololo Weather Links]]

h2. Observing Plan and Goals for the Night

# [[Calibration_Observations|Standard bias and dome flat]] sequence during afternoon
# [[Calibration Observations|Dark frames]] if no bright lights needed in dome.
# Please try to get dome open for temperature equilibration at earliest appropriate time, be sure all cooling/ventilation systems are on.
# [[Calibration Observations|i-band twilight flats]]

Operate through night with the baseline Focus&Alignment configuration (Telescope and filter LUTs in use, z Trim on, accumulate). Take note of how large the first focus correction is after slewing to new field: this will determine whether it will be habitually necessary to take a short (~30s) exposure after each slew to allow donuts/AOS to determine new focus position.

Monitor Conditions:
# Check on DIMM status, running if at all possible.
# Make sure RASICAM is online if weather conditions permit.
# A few times per night ask the operator to contact the other telescopes on Tololo to get their seeing value. Record those in the eLog.

If *good* conditions - sky is clear and seeing is <=1.1":

# [[Calibration_Observations|Photometric standards]] sequence as soon as dark enough (grizY in 3 fields at different airmasses, preferably one at X < 1.25, one at X = 1.25-1.65 and one at X > 1.65). Follow link for the suggested fields and scripts. Douglas suggests standards can begin 30 min before astronomical twilight.
# [[SN_Observing|SN template observations]] in gr until moon elevates sky brightness (should have time to do 8 shallow fields at ~7 min each, _or_ 2 deep fields at ~30 min each).
# [[SN_Observing|SN template observations]] in iz for remainder of half-night (will not have time to complete all of them)
# 1:10 AM repeat another [[Calibration_Observations|photometric standards]] sequence of grizY in 3 fields.
# Additional grizY exposures in 2 fields for [[Sky Brightness Measurements]]
# Request of Dara to repeat grizY standards in 2 or 3 fields at AM twilight.

If *moderate* conditions - thin clouds, and/or poorer seeing <=1.4"
# [[Calibration_Observations|Photometric standards]] in evening twilight
# [[Star_Flat_Observations|StarFlat sequences]] of 20 wide dithers in each grizY (g and r first, with Moon down). Move to lowest accessible Galactic latitude (b>=10 degrees) to increase stellar density w/o crowding. Should take ~20 x (80+30)s = 37 min per filter, ~3 hrs total.
# If time permits: [[Polar_Axis|Polar Axis]] determination exposures.
# [[Calibration_Observations|Photometric standards]] at 1:10 AM

If *poor* conditions - thicker clouds and/or seeing >1.4"
# [[Calibration_Observations|Photometric standards]] at evening and 1:10 AM if thin clouds or clear
# Take [[Star_Flat_Observations|StarFlat sequence]] in i band if thin clouds or clear
# [[Polar_Axis|Polar Axis]] determination
# DECal sweeps that were not completed during commissioning

Regardless of cloud conditions, If QR indicates FWHM of PSF is stable at <= 1.1" at any period:
# Take 2 focus frames in i band, 25 um steps +- 100 um from donut-recommended best focus position. [This is to determine best focus for science array relative to best focus for F/A CCDs.]

h2. Notes from the 4PM Meeting and Additional Comments

h2. Notes from Observers

h2. Notes on Analyses of Night's Data: