Nightly Observing Plan for MJD 58469 (starting the evening of Dec 16, 2018)¶
- Qiqi Wang (Observer 1)
- Richard Kron (Observer 2, Run Manager)
- Manuel Hernandez, Alberto Alvarez (night assistant)
- Staff calendar
from kentools ephem
mjd 58469, date 20181216, Site CTIO, UT-offset 3 hr Current local time 16:29 CLST UT 19:29 SidTim 20:28 Event Local-Time Greenwich Sidereal-Time Sunset 20:49 CLST 23:49 UT 00:48 12 deg Eve. -10 21:30 CLST 00:30 UT 01:29 22 deg Zeropoint; standards Eve. -14 21:53 CLST 00:53 UT 01:52 28 deg Begin obstac Eve. -18 22:17 CLST 01:17 UT 02:16 34 deg Last chance standards Midpoint 01:39 CLST 04:39 UT 05:38 84 deg Moonset 03:00 CLST 06:00 UT 06:59 105 deg Morn -18 05:00 CLST 08:00 UT 08:59 135 deg Begin astronomical twilight Morn -14 05:24 CLST 08:24 UT 09:23 141 deg End obstac; begin standards Morn -10 05:47 CLST 08:47 UT 09:47 147 deg Sunrise 06:28 CLST 09:28 UT 10:27 157 deg Moon position (deg): RA 14.5, Dec 1.5 Phase: 0.603
- At 17:00 local time, clear, mild (18.2 degrees) with light breeze (6.9 mph), humidity 40%
- Tonight: Forecast clear, Temp. 14 degrees, light breeze from the west, moderate humidity ~50%.
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for the Night¶
- DES Half night
- Evening standards
UT Date = '2018/12/17 00:30' Local time = 21:30 SDSSJ2300-0000 ra 23:00:00 dec +00:00:00 secz 1.5 C26202/HST ra 03:32:30 dec -27:46:05 secz 1.1
- Midpoint standards
UT Date = '2018/12/17 04:30' Local time = 01:30 SDSSJ0843-0000 ra 08:43:00 dec +00:00:00 secz 1.7
Notes from 4PM Meeting¶
Telescope and camera are good, calibrations started at 4:15 local. All data from last night processed by DESDM. All wide field accepted into survey table.
- standards if clear.
- photosweep if photometric, OK to start after standards
- E2 narrow band
- MACS i_2 if i-band seeing better than 1.1 arcsec; if not, repeat E2 (airmass limit happens at 3:35 UT)
- midpoint standard
Clear for photosweeps means no clouds. Rasicam, or going outside and looking at the sky.
Clear for MACS field is clear or nearly so.
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.
Priorities (highest to lowest)¶
1. Be prepared for a GW follow-up interruption. No alert at time of 4pm Meeting, but it is still a possibility