10182018¶

Nightly Observing Plan for MJD 58410 (starting evening of October 18, 2018)¶

DES has the full night.

Observers¶

• Andres Plazas (observer 2, Run Manager)
• Daniel Gruen (observer 1)

CTIO Staff¶

• Manuel Hernandez
• Alberto Alvarez
• Staff calendar

Almanac¶

from kentools ephem

mjd 58410, date 20181018, Site CTIO, UT-offset 3 hr
Current local time 15:11 CLST     UT 18:11     SidTim 15:17
Event      Local-Time  Greenwich  Sidereal-Time
Sunset     20:02 CLST  23:02 UT   20:08  302 deg  
Eve. -10   20:38 CLST  23:38 UT   20:45  311 deg  Zeropoint; standards
Eve. -14   20:58 CLST  23:58 UT   21:04  316 deg  Begin obstac
Eve. -18   21:18 CLST  00:18 UT   21:24  321 deg  Last chance standards
Midpoint   01:28 CLST  04:28 UT   01:34   24 deg  
Moonset    04:14 CLST  07:14 UT   04:21   65 deg  
Morn -18   05:38 CLST  08:38 UT   05:44   86 deg  Begin astronomical twilight
Morn -14   05:57 CLST  08:57 UT   06:04   91 deg  End obstac; begin standards
Morn -10   06:17 CLST  09:17 UT   06:24   96 deg  
Sunrise    06:53 CLST  09:53 UT   07:00  105 deg  
Moon position (deg): RA 324.3, Dec -15.4 Phase: 0.662

Weather Conditions¶

• clear, calm
• Tonight: clear, calm, humidity: 58%-31%
• Detailed hourly forecast | Satellite maps

Observing Plan and Goals for the Night¶

• DES full night
• Evening standards
  

  UT Date = '2018/10/18 23:38'     Local time = 20:38
  SDSSJ0000-0000        ra 00:00:00  dec +00:00:00  secz 1.8
  SDSSJ2300-0000        ra 23:00:00  dec +00:00:00  secz 1.4
  E8-A                  ra 20:07:22  dec -44:37:01  secz 1.0
  

• Obstac as long as seeing is < 1.6 arcsec
• If bad seeing (1.6 arcsec < seeing < 2.0) and clear: Photosweeps
• Otherwise if bad seeing (seeing > 1.6 arcsec) and not clear, or very bad seeing (seeing > 2.0 arcsec): Narrowband
• Morning standards
  

  UT Date = '2018/10/19 8:57'     Local time = 05:57
  SDSSJ0933-0005        ra 09:33:00  dec -00:05:00  secz 1.9
  SDSSJ0320-0000        ra 03:20:00  dec +00:00:00  secz 1.5
  MaxVis 
  

Useful links¶

Nightsum | CTIO Night Report | DECam Logbook
Tololo Environmental Web Page | Detailed hourly forecast | Satellite maps

Notes from 4PM Meeting¶

Priorities (highest to lowest)¶

WF survey with ObsTac¶

Photosweeps (seeing < 2.0)¶

• If RM is finished & If "Bad Seeing" and photometric and not worse than 2.0" => do Photosweep.
  Do not bother with this program if clouds are visible on Rasicam or if seeing is highly variable, for
  the varying aperture corrections make it difficult to get to mmag accuracy.
  One needs to run a python script at CTIO to generate the jsons.
  having done that THE Photosweep scripts can be found in
  /usr/remote/user/DECamObserver/ExposureScripts/DES_scripts
  with names like: photosweep20180914-2200Z.json
  Select the one with timestamp closest to the next top of hour, now in UT (we got the z added).
  Do not bother with this is there's < 30 minutes left in the night.
  A script probably takes an hour.

Narrow Band¶

• If "Bad Seeing" and not photometric, then do narrowband. Description:
  https://cdcvs.fnal.gov/redmine/projects/desops/wiki/Narrowband_SN_imaging_program
  Narrowband scripts are in the same directory as photosweep.
  Names like SN-C3X-N964.json
  They are on the SN fields, selection criteria are given on the above wiki page.
  These are expected to be about an hour long. If the clouds are only
  moderate, we could do these.

Put in the DQ as normal.
Obstac if seeing isn't bad.

Other Notes¶