Nightly Observing Plan for MJD 58461 (starting the evening of Dec 8, 2018)¶
- Josh Frieman (Observer 2, Run manager)
- Rob Morgan (Observer 1)
- Hernan Tirado, Claudio Aguilera (night assistant)
- Staff calendar
from kentools ephem
mjd 58461, date 20181208, Site CTIO, UT-offset 3 hr Current local time 16:55 CLST UT 19:55 SidTim 20:23 Event Local-Time Greenwich Sidereal-Time Sunset 20:44 CLST 23:44 UT 00:11 3 deg Eve. -10 21:24 CLST 00:24 UT 00:52 13 deg Zeropoint; standards Eve. -14 21:47 CLST 00:47 UT 01:15 19 deg Begin obstac Moonset 21:52 CLST 00:52 UT 01:19 20 deg Eve. -18 22:11 CLST 01:11 UT 01:39 25 deg Last chance standards Midpoint 01:35 CLST 04:35 UT 05:02 76 deg Morn -18 04:59 CLST 07:59 UT 08:26 126 deg Begin astronomical twilight Morn -14 05:23 CLST 08:23 UT 08:50 132 deg End obstac; begin standards Morn -10 05:46 CLST 08:46 UT 09:13 138 deg Sunrise 06:26 CLST 09:26 UT 09:54 148 deg Moon position (deg): RA 278.7, Dec -20.8 Phase: 0.111
- At 17:00 clear sky, mild (17 degrees) with a breeze (11 mph), humidity 24%
- Tonight: Forecast clear skies, Temp. 10 degrees, light breeze shifteing from northwest to south, Humidity ~50%.
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for the Night¶
- DES Half night
- Evening standards
UT Date = '2018/12/09 00:24' Local time = 21:24 SDSSJ2140-0000 ra 21:40:00 dec +00:00:00 secz 1.7 SDSSJ0320-0000 ra 03:20:00 dec +00:00:00 secz 1.4 SDSSJ0100-0000 ra 01:00:00 dec +00:00:00 secz 1.2
- Midpoint standards
UT Date = '2018/12/09 04:35' Local time = 01:35 SDSSJ0320-0000 ra 03:20:00 dec +00:00:00 secz 1.3
h3. Useful links
Notes from 4PM Meeting¶
Calibrations about to start. Telescope and camera are good.
- 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). If running Narrowband, prioritize E2.
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.