Nightly Observing Plan for MJD 58454 (starting the evening of Dec 1, 2018)¶
DES has the full night.
- Larissa Markwardt (Observer 2)
- Nikolay Kuropatkin (Observer 1)
- Martin Murphy (Run Manager)
- Manuel Hernandez, Alberto Alvarez (night assistant)
- Staff calendar
from kentools ephem
mjd 58454, date 20181201, Site CTIO, UT-offset 3 hr Current local time 17:00 CLST UT 20:00 SidTim 19:59 Event Local-Time Greenwich Sidereal-Time Sunset 20:38 CLST 23:38 UT 23:38 354 deg Eve. -10 21:18 CLST 00:18 UT 00:18 4 deg Zeropoint; standards Eve. -14 21:41 CLST 00:41 UT 00:41 10 deg Begin obstac Eve. -18 22:04 CLST 01:04 UT 01:04 16 deg Last chance standards Midpoint 01:32 CLST 04:32 UT 04:32 68 deg Moonrise 03:43 CLST 06:43 UT 06:43 101 deg Morn -18 05:00 CLST 08:00 UT 07:59 120 deg Begin astronomical twilight Morn -14 05:23 CLST 08:23 UT 08:23 126 deg End obstac; begin standards Morn -10 05:46 CLST 08:46 UT 08:46 132 deg Sunrise 06:26 CLST 09:26 UT 09:26 142 deg Moon position (deg): RA 189.8, Dec 1.8 Phase: 0.342
- Clear. Gentle breeze. 32% Humidity.
- Tonight: Clear. Humidity ~57% start of night, rising to ~61% by morning. No clouds.
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for the Night¶
- DES full night
- Evening standards
UT Date = '2018/12/02 00:18' Local time = 21:18 SDSSJ0320-0000 ra 03:20:00 dec +00:00:00 secz 1.6 SDSSJ2140-0000 ra 21:40:00 dec +00:00:00 secz 1.5 SDSSJ0000-0000 ra 00:00:00 dec +00:00:00 secz 1.2
- Morning standards
UT Date = '2018/12/02 08:23' Local time = 05:23 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
Notes from 4PM Meeting¶
Manuel say calibrations were off to a late start due to a tour group on the deck. Telescope and camera reports are good.
- C1, C2, & C3 reverberation mapping fields at 03:30 UT (00:30 local)
- [if seeing is bad*] do reverberation mapping
*This means if the psf is > 1.6 arcsec for several exposures in a row with no sign of improvement. Choose which script to use based on the SN field that is transiting at the time the seeing is bad. Use http://des-ops.fnal.gov:8080/prednight/ to decide which one.
If poor seeing persists after Reverberation Mapping then Photosweep, then Narrowband (details below):
If you have "Bad Seeing" and photometric and not worse than 2.0", do
Photosweep. Instructions can be found here:
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 script at CTIO to generate the jsons (see the
instructions wiki page). Having done that the Photosweep scripts can
be found in
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.
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:
Narrowband 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:
These are expected to be about an hour long. If the clouds are only moderate, we could do these. Again, Obstac if seeing isn't bad, and waiting on reverb mapping fields to near transit.