Observing Plan for MJD 56322 (starting evening of January 29 2013)


Observer 1 Observer 2 Run Manager SISPI Expert on Call
Old/March Kunder/Rooney Soares-Santos -

DECam Configuration and Setup

SISPI Configuration File sv.ini
Proposal ID 2012B-0003
Image Processing (Calibration) NCSA
Image Processing (First Cut) NCSA

Almanac and Weather

Twilight Evening: 01:15 UT
Twilight Morning: 08:37 UT
Moon Rise: 00:25 UT
Moon Set: 12:27 UT
Moon Illum.: 95 %
Middle of night hand over to community at 01:54

Plan and Goals for the Night

  1. Engineering Tests (Alistair Walker): TBD
  2. Calibration (Douglas Tucker):
    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.
    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. SN observations (Masao Sako):
    Given the shortage of observing time, the SN group agreed that it will be more useful to obtain 2 more epochs of half of our fields than to get 1 epoch of each. So our plan is to drop E1,E2,X1,X2,X3 and continue with S1,S2,C1,C2,C3. Each of the 5 fields are in the deadman state. Here are the priorities for the next several nights.
    1) S1,S2 griz (16 days old)
    2) C1,C2 griz (13 days old)
    3) C3 r (16 days old)
    4) C3 g (14 days old)
    5) C3 iz (12 days old)
  4. Obstac (Eric Neilsen): If time permits

Notes from the 4PM Meeting and Additional Comments

  • Data for engineering tests were requested by the TCS team. Details TBD.
  • 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.
  • When observing the SN fields, please record in the e-log the offsets that you apply to the pointings (via the observer's console) and the results of the "center" command. There should no longer be any need for cos(dec) corrections. Also please do not iterate more than once on the SN field pointings; this consumes a lot of time.
  • 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.