Date:
Saturday, September 10, 2016
Telescope:
CTIO Blanco 4-m
Submitter:
Eve Kovacs
Submitter Email:
Observer Support:
Manuel Hernandez
Night Assistant:
Alberto Alvarez
Also Present:
Carlos Corco
Problems:
Possible problem with Tololo site conditions plot of flux and seeing.
The flux shows an anomalous jump at 6:00 UT. Nothing is plotted after 7:00 UT
Operartor comments that the jump could be due to using a different star. No data may be due to lack of suitable star.
The pmas_temp (primary temperature) was higher than the lowdome_temp all night. This is because the mirror was relatively hot at the beginning of the night, so when the outside temperature plummetted after sunset, it dropped below the mirror temperature and the mirror never cooled below this.
We alerted telobs at the beginning of the night, and they assured us that this state was OK. The instrumental seeing was nominal all night and the total seeing was OK (but not great).
Program:
Proposal:
2012B-0001
Target of Oportunity:
No
Time Observed:
10.0
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
0.0
Time lost other:
0.0
Description:
DES Observing
Primary Investigator:
Josh Frieman
Email:
Institution:
Fermilab
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
10
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2016-09-10 | 10.0 | 0.0 | 0.0 | 0.0 | 0.0 | 10 |
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Varying amounts of cloud cover caused variability in the seeing.
Link to DES night summary
http://des-ops.fnal.gov:8080/nightsum/nightsum-2016-09-10/nightsum.html
*Observing Team*
_DES Observers:_ Mei-Yu Wang, Kyle Story, Eve Kovacs
_Telops:_ Manuel Hernandez, Alberto Alvarez
_Remote Support:_
*Observing Plan*
# full night observing DES Y4
# 3 evening standards, including 1 calspec:SF1615_CCD_52, SDSSJ1442-0005, E8-A
# ObsTac
# 3 morning standards, including 1 calpesc:SDSSJ0100-0000, WD0308-565_CCD_35, SDSSJ0320-0000
*Conditions*
# At beginning: Thin clouds. 14.4 C. Winds 8.2 mph. Humidity = 18%
# At midpoint: Thin clouds 13.5 C. Winds 11.7 mph. Humidity = 29%
*Accomplishments*
# Observed evening standard stars. Calspec and two 'normal' standards.
# Observed widefield ExpID: 573332-573409
# Observed Supernova Field E2 ExpID: 573410-573415
# Observed widefield ExpID: 573416-573433
# Observed Supernova Field E1 ExpID: 573434-573439
# Observed widefield ExpID: 573440-573538
# Observed Supernova Field X2 ExpID: 573539-573548
# Observed widefield ExpID: 573549-573560
# Observed Supernova Field X3 ExpID: 573561-573576
# Observed widefield ExpID: 573577-573584
# Observed all three morning standards. Calspec and two 'normal' standards.
*Comments*
# Spike in seeing at 1:26 UT due to cloud in field.
# Switched to Supernova field at 2:24 UT due to poor seeing
# Switched back to widefield at 2:44 UT
# Switched to Supernova field at 3:22 UT due to poor seeing
# Switched back to widefield at 3:43 UT
# Cloud cover deceasing by 4:30 UT and significantly less by 5:00 UT
# Wind is picking up at 6:00 UT
# Bank of clouds rolling in at 6:24 UT. Seeing deteriorated from below 1 to 1.25
# Flux in site conditions plots shows anomalous jump at 6:00 UT. Nothing plotted after 7:00 UT
# Operartor comments that the jump could be due to using a different star. No data may be due to lack of suitable star.
# Wind continues to increase