Nightly Observing Plan for MJD 58390 (starting evening of September 28, 2018)¶
DES has the full night.
- Anqi Chen (observer 1)
- Erika Wagoner (observer 2)
- Devon Hollwoood (Run Manager)
- Claudio Aguilera
- Jacqueline Seron
- Staff calendar
mjd 58390, date 20180928, Site CTIO, UT-offset 3 hr Current local time 16:31 CLST UT 19:31 SidTim 15:19 Event Local-Time Greenwich Sidereal-Time Sunset 19:49 CLST 22:49 UT 18:37 279 deg Eve. -10 20:24 CLST 23:24 UT 19:12 288 deg Zeropoint; standards Eve. -14 20:43 CLST 23:43 UT 19:31 293 deg Begin obstac Eve. -18 21:02 CLST 00:02 UT 19:50 298 deg Last chance standards Moonrise 23:16 CLST 02:16 UT 22:04 331 deg Midpoint 01:33 CLST 04:33 UT 00:21 5 deg Morn -18 06:04 CLST 09:04 UT 04:52 73 deg Begin astronomical twilight Morn -14 06:22 CLST 09:22 UT 05:09 77 deg End obstac; begin standards Morn -10 06:42 CLST 09:42 UT 05:29 82 deg Sunrise 07:17 CLST 10:17 UT 06:04 91 deg Moon position (deg): RA 54.5, Dec 15.0 Phase: 0.740
- 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
- If clouds remain, run DECal
Standards for evening twilight UT Date = '2018/09/28 23:24' Local time = 20:24 E6-A ra 14:45:33 dec -45:15:34 secz 1.7 SDSSJ2140-0000 ra 21:40:00 dec +00:00:00 secz 1.4 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 = '2018/09/29 09:22' Local time = 06:22 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.