Nightly Observing Plan for MJD 57785 (starting evening of Jan 31, 2017)¶
- Ting Li (Obs 1)
- Sebastian Bocquet (Obs 2, RM)
- Hernán Tirado - Obs. Support
- Alberto Alvarez - Operator
- Staff calendar
mjd 57785, date 20170131, Site CTIO, UT-offset 3 hr Current local time 15:38 CLST UT 18:38 SidTim 22:40 Sunset 20:49 CLST 23:49 UT SidTim 58 deg Eve. -10 21:27 CLST 00:27 UT SidTim 68 deg Zeropoint; standards Eve. -14 21:48 CLST 00:48 UT SidTim 73 deg Begin obstac Eve. -18 22:10 CLST 01:10 UT SidTim 78 deg Last chance standards Moonset 23:12 CLST 02:12 UT SidTim 94 deg Midpoint 01:57 CLST 04:57 UT SidTim 135 deg Morn -18 05:43 CLST 08:43 UT SidTim 192 deg Begin astronomical twilight Morn Std 06:05 CLST 09:05 UT SidTim 197 deg End obstac; begin standards Morn -10 06:26 CLST 09:26 UT SidTim 202 deg Sunrise 07:04 CLST 10:04 UT SidTim 212 deg Moon position (deg): RA 4.2, Dec -0.4 Phase: 0.259
- Clear in the afternoon, big clouds east, little less haze than on the previous days. Humidity about 65%.
- Detailed hourly forecast | Satellite maps
Observing Plan and Goals for the Night¶
* Evening Standards: Yzirg.
UT Date = '2017/02/01 00:28' Local time = 21:28 E4-A ra 09:23:44 dec -45:21:02 secz 1.9 SDSSJ0200-0000 ra 02:00:00 dec +00:00:00 secz 1.5 SDSSJ0320-0000 ra 03:20:00 dec +00:00:00 secz 1.2
* Defocus script
* Obstac: Mostly wide field
* If the seeing in i-band is better than 1.05", we will do cosmos-gri-part2.json around 1:15 CT (4:15 UT)
* Half Night standards (using calspec) use only 1 (highest airmass): grizY
UT Date = '2017/02/01 04:53' Local time = 01:53 SDSSJ1227-0000 ra 12:27:00 dec +00:00:00 secz 1.9
When were the last SN fields observed?¶
(See https://cdcvs.fnal.gov/redmine/projects/desops/wiki/When_were_the_SN_fields_last_observed for database query.)
hex_name seqtype last_complete SN-X3 long_z 2017-01-26 00:55:51.528351+00:00 SN-E1 short 2017-01-27 00:53:18.591071+00:00 SN-X2 short 2017-01-27 01:14:13.977544+00:00 SN-X3 long_i 2017-01-27 01:33:32.157988+00:00 SN-E2 short 2017-01-28 00:53:06.852121+00:00 SN-X1 short 2017-01-28 01:14:15.665466+00:00 SN-X3 long_r 2017-01-28 01:33:29.425048+00:00 SN-X3 long_g 2017-01-29 01:04:14.492806+00:00 SN-S2 short 2017-01-29 01:17:20.589302+00:00 SN-S1 short 2017-01-29 01:36:41.706064+00:00 SN-C3 long_r 2017-01-29 01:57:12.786249+00:00 SN-C3 long_z 2017-01-29 02:20:30.702561+00:00 SN-C2 short 2017-01-31 00:48:51.012551+00:00 SN-C3 long_g 2017-01-31 01:12:08.842422+00:00 SN-C3 long_i 2017-01-31 01:33:23.812696+00:00 SN-C1 short 2017-01-31 02:22:33.431244+00:00
Notes from 4pm meeting¶
HTD, Sebastian, Ting, Hernan, Rick K, Gary, Michael, Eric N, Yanny, Bobby, Huan, Josh
Camera & Telescope
All OK. Flats are underway.
No problems with Chrome
Seeing not great, so no Cosmos field.
Rasicam live image looked OK, but nightsum showed Rasicam with zero clouds and zero uncertainty.
SN: C1, C2, C3g, C3i
Desdm and DQ
Got all the data. All processed. All SN good. 1 WF bad.
Clear, clouds east. Forecast is clear.
Nothing on deadman 6. X3z is at 5 nights. Not sure if it will fit the airmass limit. Others on 4 nights.
--- * SN Turnoff Topics:
E1 & E2 are now disabled
7 night deadman is disabled
Modest seeing trigger is still enabled
It’s possible to force SN with json scripts
The SN discussion is now down to if/when we force SN observations with scripts.
My sense is that will depend on what happens with the seeing-triggered SN fields
in the nights ahead.
We want to make sure we get the C-fields late.
Eric N suggests a straw man plan so:
On Feb. 7, use a script to do X3-z at the start of the night.
Note that it will be a high airmass (~2.5) by the time it finishes
even if started first thing. As it is in z, this is good use of very
moony time. X3 is 68 degrees from the moon on this night.
(If do X3-z tomorrow night, on the evening of Feb 1, then it finishes with an
airmass of ~2.0. This means that, with the current airmass limit of 1.7,
it cannot be seeing triggered.)
On Feb. 8, the last night before the bright time break, do C3-z. Again, as
it is in z, this is good use of very moony time. C3 is 75 degrees from the moon
on this night.
On Feb. 15, the first night back, do the rest of the C3 filters.
(The start of this night is dark, so we can do the g and r filters well.)
- Cosmos Field Deep Observations
A second discussion is if/when we will do ~3 hours of deep field observations
for photo-z calibration in the Cosmos fields at approximately RA/DEC 150.10/2.28
The plan would be 10x330s exposures for each of r, g, and i bands, dithered so as to fill
the CCD gaps while leaving the full COSMOS field in every exposure?
This would be 1hr of clock time each, and give the observers instructions to do them whenever:
r: dark and PSF<1”
g: dark and PSF<1.1”
i: dark or grey and PSF<1.0”
in order of decreasing priority.
This would have to be done in the late parts of our 1st halves.
Eric N suggest that if we are going to do this, that it is divided into six 30 minute scripts.
Huan will make the scripts.
Previous request for cosmos observations has priority.
Wildlife report: No snake, no panthers
WoD: 3 cheers for 3 years. (finished tile 6).