Nightly Observing Plan for MJD 58389 (starting evening of September 27, 2018)¶
DES has the full night.
- Erika Wagoner (observer 1)
- Anqi Chen (observer 2)
- Devon Hollwoood (Run Manager)
- Claudio Aguilera
- Jacqueline Seron
- Staff calendar
mjd 58389, date 20180927, Site CTIO, UT-offset 3 hr Current local time 16:29 CLST UT 19:29 SidTim 15:12 Event Local-Time Greenwich Sidereal-Time Sunset 19:49 CLST 22:49 UT 18:32 278 deg Eve. -10 20:24 CLST 23:24 UT 19:07 287 deg Zeropoint; standards Eve. -14 20:43 CLST 23:43 UT 19:26 292 deg Begin obstac Eve. -18 21:02 CLST 00:02 UT 19:45 296 deg Last chance standards Moonrise 22:16 CLST 01:16 UT 21:00 315 deg Midpoint 01:33 CLST 04:33 UT 00:17 4 deg Morn -18 06:05 CLST 09:05 UT 04:49 72 deg Begin astronomical twilight Morn -14 06:23 CLST 09:23 UT 05:07 77 deg End obstac; begin standards Morn -10 06:43 CLST 09:43 UT 05:27 82 deg Sunrise 07:18 CLST 10:18 UT 06:02 90 deg Moon position (deg): RA 41.3, Dec 11.1 Phase: 0.807
- Cloudy, with clouds expected through the night.
- Light wind predicted.
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for the Night¶
- DES full night
Standards for evening twilight UT Date = '2018/09/27 23:24' Local time = 20:24 SDSSJ2140-0000 ra 21:40:00 dec +00:00:00 secz 1.5 E8-A ra 20:07:22 dec -44:37:01 secz 1.1
- Obstac as long as seeing is < 1.6 arcsec
- If bad seeing (1.6 arcsec < seeing < 2.0) and clear: Photosweeps
- If bad seeing (seeing > 1.6 arcsec) and not clear, or very bad seeing (seeing > 2.0 arcsec): Narrowband (X3 or C3)
- If seeing good but cloudy: obstac
- Call Eric if there are problems
- Morning standards (if clear) [grizY ordered scripts]:
Standards for morning twilight UT Date = '2018/09/28 09:23' Local time = 06:23 SDSSJ0843-0000 ra 08:43:00 dec +00:00:00 secz 1.9 E4-A ra 09:23:44 dec -45:21:02 secz 1.6 C26202/HST ra 03:32:30 dec -27:46:05 secz 1.1
Notes from (yesterday's) 4PM Meeting¶
Detailed plan for bad seeing:¶
- Run Obstac if not bad seeing.
- Start w/ gr for a very little while, then zY, then only Y
Definition of "Bad Seeing":¶
If the PSF projected to i-band @ zenith > 1.1", Obstac will be queueing g-band exposures close to zenith (Y-band if it's Moony). The PSF isn't as good with g-band as the other filters. Use the KentOols report to watch the seeing on indvidual exposures if we get PSF > 1.6" for several in a row and there isn't any obvious likelihood of improvement to better than 1.6" in the next 10 minutes then we call the time "bad seeing".
Tonight if the conditions reach "bad seeing" we do either "photosweep" or "narrow band" scripts. Photosweep has higher priority than "narrowband". If "Bad Seeing" and photometric and not worse than 2.0" => Photosweep. If "Bad Seeing" and not photometric, then do narrowband.
Observers generate the photo-z jsons run the photo-z script. It's at /usr/remote/user/sispi/y6_global_photometry_program/photosweep.sh 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.
- Do not bother with this program if clouds are visible on Rasicam.
- Require Bad Seeing, but PSF <2 arcsec. If seeing is worse or highly variable,
the varying aperture corrections make it difficult to get to mmag accuracy. Probably they take an hour.
- Narrowband scripts are in the directory: /usr/remote/user/DECamObserver/ExposureScripts/DES_scripts
- Names like SN-C3X-N964.json
- Information about the transit time of thse fields can be found at http://des-ops.fnal.gov:8080/prednight/ .
- They are on the SN fields, so select the field that is closest to transit.
- These are expected to be about an hour long. If the clouds are only moderate, we could do these.