Date:
Saturday, November 29, 2014
Telescope:
CTIO Blanco 4-m
Submitter:
Chris Smith
Submitter Email:
Observer Support:
Rodrigo Hernandez
Night Assistant:
Claudio Aguilera
Also Present:
Javier Rojas, Humberto Orrego, Lucy Clerkin, Nicokay Kuropatkin
Problems:
1) Clouds
2) Strange spike in pressure in 1r line, accompanied by frost on line for short time; watched carefully, but no additional problems
3) primary mirror significantly warmer than ambient
Comments:
*Observing Team*
_DES Observers:_ Nikolay Kuropatkin (Obs1), Chris Smith (Obs2), Lucy Clerkin (RM)
_Telops:_ Rodrigo Hernandez (Obs Support), Claudio Aguilera (Night Support)
_Remote Support:_ ---
*Observing Plan*
# Standard bias, standard flats
# evening standard stars
# run ObsTac queue
# end of the night standard star
# end of night calibrations
*Conditions*
# weather in afternoon 17:30 (local): thick cloud cover, 7.2C , wind 7 mph, humidity 65%
# at sunset 20:30 local: clouds over most of sky, clear band to west, 7.1C, wind 6.9 mph, humidity 48%
# at 22:50, clouds have moved enough to allow opening, sky 3/4 clear (cloud band now covering only 1/4 to East)
# 22:50 local: 6.2C, wind 4 mph, humidity 52%
# at start of OCS, 23:10 local: 3/4 sky clear, 6.3C, wind 4 mph, humidity 48%
# NOTE: mirror temp significantly higher than outside temp (about +3C) = bad seeing
# 01:30 local: 7.1C, wind 5 mph, humidity 25%
# 03:10 local: 6.7C, wind 10mph, humidity 38%
# raised windscreen at 03:15, wind speed consistently >9mph
# 05:10 local: 7.2C, wind 7 mph, humidity 30%
# weather summary: mostly clear, 6-7C, humidity 30-60%
# Seeing conditions: ~1.5-3.0, highly variable during night
# Wind conditions: wind 5-10 mph
*Accomplishments*
# Afternoon: SISPI restarted, zeros done, (YziVRrgu) dome flats done, flats checked OK
# Dome NOT opened before sunset due to threatening clouds
# 22:50 local time: clouds moving out to east, open dome!
# seeing in zero points = 3"... not unexpected as clouds move out
# 23:10 local: start OCS queue; SUPERNOVAE (perhaps clean up observations from rejected frames from last night?)
# SN field E1 (griz), seeing g=2.75", r=2.61", i=2.30", z=2.55" (seeingall)
# SN field E2 (griz), seeing g=2.49", r=2.40", i=2.35",
# SN field X2 (griz), seeing g=2.69"
# SN field C2 (griz), seeing g=2.60"
# SN field C1 (griz), seeing g=2.45"
# 00:57 local: SWITCH to wide-field survey
# survey exposures: all Y-band (plus three z) through 02:15, while moon up
# survey exposures: g band starting at 02:16 local
# moon set at 02:28 local
# survey exposures almost all g band for rest of night (except one Y and r)
# survey exposures: started Y band at 05:12 local
# End of night: Standards (05:25 local)
## C26202/HST
## SDSS J1048 - 0000
## SDSS J0843 - 0000
*Problems tagged as Synopsis_Problem*
# Strange spike in 1r nitrogen line pressure, accompanied by slight frost on the 1r metal lines; system seemed to recover without intervention.
# Rasicam: off
# DIMM: on
*Minor Problems and Relevant Information*
# primary mirror temp significantly (~3C) higher than outside temp, leading to bad seeing
*Notes for Data Management*
# clear but bad seeing.
Program:
Proposal:
2012B-0001
Target of Oportunity:
No
Time Observed:
5.5
Time Engineering:
0.0
Time lost technical:
0.0
Time lost weather:
2.5
Time lost other:
0.0
Description:
Dark Energy Survey
Primary Investigator:
Frieman
Email:
Institution:
DES
Instrument:
CTIO 4m DECam
Organization:
NOAO
Total Program Time:
8
| Total Times | Time Observed | Time Engineering | Time lost technical | Time lost weather | Time lost other | Total Program Time |
|---|---|---|---|---|---|---|
| 2014-11-29 | 5.5 | 0.0 | 0.0 | 2.5 | 0.0 | 8 |
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