Nightly Observing Plan for MJD 58471 (starting the evening of Dec 18, 2018)¶
- Richard Kron (Observer 1, Run Manager)
- Qiqi Wang (Observer 2)
- Hernan Tirado, Alberto Alvarez (night assistant)
- Staff calendar
from kentools ephem
mjd 58471, date 20181218, Site CTIO, UT-offset 3 hr Current local time 15:41 CLST UT 18:41 SidTim 19:48 Event Local-Time Greenwich Sidereal-Time Sunset 20:50 CLST 23:50 UT 00:57 14 deg Eve. -10 21:31 CLST 00:31 UT 01:38 24 deg Zeropoint; standards Eve. -14 21:54 CLST 00:54 UT 02:01 30 deg Begin obstac Eve. -18 22:19 CLST 01:19 UT 02:26 36 deg Last chance standards Midpoint 01:40 CLST 04:40 UT 05:47 87 deg Moonset 04:10 CLST 07:10 UT 08:17 124 deg Morn -18 05:01 CLST 08:01 UT 09:08 137 deg Begin astronomical twilight Morn -14 05:25 CLST 08:25 UT 09:32 143 deg End obstac; begin standards Morn -10 05:48 CLST 08:48 UT 09:55 149 deg Sunrise 06:29 CLST 09:29 UT 10:36 159 deg Moon position (deg): RA 39.1, Dec 10.7 Phase: 0.727
- At 21:00 local time, clear sky with no clouds, 13.4 degrees with light breeze (6.9 mph), humidity 47%
- Tonight: Forecast, 12 degrees, light breeze from west, ~44% humidity
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for h1. 12172018the Night¶
- DES Half night
- Evening standards
UT Date = '2018/12/19 00:31' Local time = 21:31 MaxVis ra 06:30:00 dec -58:45:00 secz 1.8 SDSSJ2300-0000 ra 23:00:00 dec +00:00:00 secz 1.5 SDSSJ0100-0000 ra 01:00:00 dec +00:00:00 secz 1.2
- Midpoint standards
UT Date = '2018/12/19 04:40' Local time = 01:40 SDSSJ0933-0005 ra 09:33:00 dec -00:05:00 secz 2.1 SDSSJ0843-0000 ra 08:43:00 dec +00:00:00 secz 1.6 C26202/HST ra 03:32:30 dec -27:46:05 secz 1.1
Notes from 4PM Meeting¶
Calibrations started. All data from last night processed by DESDM, one declared, all others declared bad. (heavy clouds)
- Do standards if clear.
- Obstac for about 50 minutes.
- If seeing < 1.1" in i-band and sky is clear, execute MACSJ0416_z_2 script in /user/remote/DECamObserver/ExposureScripts/DES_script/MACSJ0416_z_2.json.
- If sky is photometric, run star flat scripts in /usr/remote/user/DECamObserver/ExposureSCripts/Engineering/engineering_20181122 in five bands (grizY). Position needs to be manually put in before starting the scripts. Position is: RA: 06H 40M DEC: -34D 00M.
- If sky is not photometric, obstac.
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