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09092018

Nightly Observing Plan for MJD 58371 (starting evening of September 9, 2018)

DES has the second half of the night.

Observers

  • Taylor Hutchison (observer 1)
  • Jen Marshall/Travis Prochaska (observer 2)
  • Steve Kent (Run Manager)

CTIO Staff

  • Manuel Hernandez - Obs. Support
  • Alberto Alvarez - operator
  • Staff calendar

Almanac

mjd 58371, date 20180909, Site CTIO, UT-offset 3 hr
Current local time 04:56 CLST     UT 07:56     SidTim 02:29
Event      Local-Time  Greenwich  Sidereal-Time
Sunset     19:39 CLST  22:39 UT   17:12  258 deg  
Eve. -10   20:14 CLST  23:14 UT   17:46  266 deg  Zeropoint; standards
Eve. -14   20:32 CLST  23:32 UT   18:05  271 deg  Begin obstac
Eve. -18   20:51 CLST  23:51 UT   18:24  276 deg  Last chance standards
Midpoint   01:40 CLST  04:40 UT   23:12  348 deg  
Morn -18   06:29 CLST  09:29 UT   04:01   60 deg  Begin astronomical twilight
Morn -14   06:46 CLST  09:46 UT   04:18   64 deg  End obstac; begin standards
Morn -10   07:06 CLST  10:06 UT   04:38   70 deg  
Sunrise    07:41 CLST  10:41 UT   05:13   78 deg  
Moon position (deg): RA 175.5, Dec 6.5 Phase: 0.021

Weather Conditions

Observing Plan and Goals for the Night

  • DES second half night: 01:40 CLT to 07:42 CLT
  • Standards
One standard for Middle-of-Night Switchover 

UT Date = '2018/09/10 4:40'     Local time = 01:40
C26202/HST            ra 03:32:30  dec -27:46:05  secz 1.8
  • Obstac as long as seeing is < 1.6 arcsec
  • If bad seeing (>1.6 arcsec): reverberation mapping scripts (10 json files), then go back to obstac
  • Morning standards (if clear) [grizY ordered scripts]:
Standards for Morning Twilight 

UT Date = '2018/09/10 09:46'     Local time = 06:46
SDSSJ0100-0000        ra 01:00:00  dec +00:00:00  secz 1.8
SDSSJ0200-0000        ra 02:00:00  dec +00:00:00  secz 1.4
SDSSJ0320-0000        ra 03:20:00  dec +00:00:00  secz 1.2

Useful links

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