12032018¶
Nightly Observing Plan for MJD 58455 (starting the evening of Dec 2, 2018)¶
DES has 3/4 night.
Observers¶
- Larissa Markwardt (Observer 2)
- Nikolay Kuropatkin (Observer 1)
- Martin Murphy (Run Manager)
CTIO Staff¶
- Hernan Tirado, Rodrigo Hernandez, Alberto Alvarez (night assistant)
- Staff calendar
Almanac¶
from kentools ephem
mjd 58456, date 20181203, Site CTIO, UT-offset 3 hr Current local time 15:42 CLST UT 18:42 SidTim 18:50 Event Local-Time Greenwich Sidereal-Time Sunset 20:40 CLST 23:40 UT 23:48 357 deg Eve. -10 21:20 CLST 00:20 UT 00:28 7 deg Zeropoint; standards Eve. -14 21:43 CLST 00:43 UT 00:51 13 deg Begin obstac Eve. -18 22:06 CLST 01:06 UT 01:14 18 deg Last chance standards Midpoint 01:33 CLST 04:33 UT 04:41 70 deg Moonrise 04:55 CLST 07:55 UT 08:03 121 deg Morn -18 04:59 CLST 07:59 UT 08:07 122 deg Begin astronomical twilight Morn -14 05:23 CLST 08:23 UT 08:31 128 deg End obstac; begin standards Morn -10 05:45 CLST 08:45 UT 08:53 133 deg Sunrise 06:26 CLST 09:26 UT 09:34 144 deg Moon position (deg): RA 214.7, Dec -7.7 Phase: 0.216
Weather Conditions¶
- Clear. Breezey 16:00 winds at 11 mph.
- Tonight: Clear to start with no wind. Humidity ~69% start of night, rising to ~90% by 05:00. Cloud cover predicted at 15% by 04:00.
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for the Night¶
- DES partial night.
- Surrender observing to Scott Shepard for two hours starting at 02:33 UTC
- Evening standards
UT Date = '2018/12/04 00:20' Local time = 21:20 SDSSJ0320-0000 ra 03:20:00 dec +00:00:00 secz 1.6 SDSSJ0000-0000 ra 00:00:00 dec +00:00:00 secz 1.2
- Morning standards
UT Date = '2018/12/04 08:23' Local time = 05:23 E2-A ra 04:03:00 dec -44:41:45 secz 1.7 SDSSJ1048-0000 ra 10:48:00 dec +00:00:00 secz 1.4 SDSSJ0843-0000 ra 08:43:00 dec +00:00:00 secz 1.2
Useful links¶
Nightsum | CTIO Night Report | DECam Logbook
Tololo Environmental Web Page | Detailed hourly forecast | Satellite maps
Notes from 4PM Meeting¶
Rodrigo says calibrations are underway. Telescope and camera are good.
For tonight:
- OBSTAC
- Surrender observing to Scott Shepard for two hours starting at 02:33 UTC
- Resume OBSTAC
- If seeing is bad (Bad means if the psf is > 1.6 arcsec for several exposures in a row with no sign of improvement) complete Photosweep, then Narrowband (details below):
Photosweep
----------
If you have "Bad Seeing" and photometric and not worse than 2.0", do
Photosweep. Instructions can be found here:
https://cdcvs.fnal.gov/redmine/projects/desops/wiki/Y6_global_photometry_programDo 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 script at CTIO to generate the jsons (see the
instructions wiki page). 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.
Narrowband
----------
If "Bad Seeing" and not photometric, or if "Bad Seeing" and everything
else if done, then do Narrowband. Instructions and a description can be found here:
https://cdcvs.fnal.gov/redmine/projects/desops/wiki/Narrowband_SN_imaging_programNarrowband scripts are in the same directory as Photosweep, and have names like SN-C3X-N964.json
They are on the SN fields, so select the field that is closest to transit. Transit time for SN fields can be found on this page:
http://des-ops.fnal.gov:8080/prednight/These are expected to be about an hour long. If the clouds are only moderate, we could do these.