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DRAFT - Observing Plan for MJD 56326 (starting evening of February 02 2013)

Observers

Observer 1 Observer 2 Run Manager
Rooney/March Nord Soares-Santos

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

Almanac and Weather

Sunset: 20:48
Twilight Ends: 22:09
Twilight Starts: 05:45
Middle of night handover to community at 01:57
Moon Rise: 00:30
Moon Set: 13:30
Moon Illum.: 61%
Expected Weather: Clear

Plan and Goals for the Night

  1. Afternoon calibration data:
    1. dome flats including u-band in case we get to the half-chip SNe observations.
  2. Calibration observations (Douglas Tucker):
    1. Attached (FebStds.txt) is a list of night-by-night suggestions for the rest of the DES time, assuming the normal evening twilight times and a single standard star field just before middle-of-the-night switchover.
    2. Currently, we are observing 3 standard star fields in evening twilight -- at least one and preferably more in SDSS Stripe 82 -- and one more just before switchover. For the 3 standard fields observed during evening twilight, one should be at low airmass (<1.25), one at medium airmass (1.25-1.65), and one at high airmass (1.65-2.10).
    3. BEFORE taking/queuing the evening twilight standards tonight, do a quick check by running on observer2:
      source ~/dtucker/bin/setup_StdStarFieldPicker.csh
      decamStdFieldsTimeDate.py --UT='2013/01/30 00:43' (replacing with the time the standards sequence will start)

      and, if SDSSJ0100-0000 does not appear in the resulting table, replace it with an observation of the E2-A prenight script
  3. TCS tests (Michael Warner):
    The HA telescope tracking has been very good since the modifications/maintenance on the HA oil bearing sweepers 2 days ago (<.05"rms) , but there is an area where we have not tested the HA tracking performance yet, and will like to get some test exposures, during the next few days:
    1. At 4 hours East Hour Angle and -10 degrees in declination, take two consecutive guided 2 minutes exposures.
    2. At 3.5 hours East Hour Angle and -10 degrees in declination, take two consecutive guided 2 minutes exposures.
    3. At 3.0 hours East Hour Angle and -10 degrees in declination, take two consecutive guided 2 minutes exposures.
    4. At 2.5 hours East Hour Angle and -10 degrees in declination, take two consecutive guided 2 minutes exposures.
    5. At 2.0 hours East Hour Angle and -10 degrees in declination, take two consecutive guided 2 minutes exposures.
  4. Obstac (Eric Neilsen):
    1. If seeing is <1.3 arcsec, run in auto-mode to observe SPT-E mini-survey.
  5. Half-chip SN observations (Huan Lin):
    Exposures of each SN field taken with 1/2-chip shift from normal pointings, to reconcile the photometric systems. They can be done in poor seeing but should not have clouds. On the night these are done, you will need to take u-band dome flats and add u-band to the standards as well. These exposures are lower priority than obtaining the regular SN observations above.
    1. E1, E2 (only if there is time; check if not too low)
  6. SN observations (Masao):
    If seeing is poor and we have thin clouds, we can do another visit of X1 and X2 griz.

Notes from the 4PM Meeting and Additional Comments

  • please keep an eye on the guider traces and try to estimate the rate at which oscillations appear vs declination of the target. We would like to see how the horseshoe damper motor upgrade is influencing tracking issues.
  • No need to fine-tune the pointings for the SN exposures that will have the half-chip shifts.
  • Keep an eye on the wind speed, especially when the dome is facing upwind (usually North). Alistair noted winds easily inducing telescope motion (again you can watch the guider traces). Basic instructions: for winds > 5-8 mph, raise the wind blind to cover ~ 30% of the telescope. For winds >15 mph, close the louver windows in the dome as well.
  • See the SV "extended SV schedule" page for instructions on how soon you can begin standards and sky observations.