ENR CTIO Blanco 4-m 2014-11-29

Date:

Saturday, November 29, 2014

Telescope:

CTIO Blanco 4-m

Submitter:

Chris Smith

Submitter Email:

csmith@noao.edu

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.

Conditions:

General Conditions

Comment:

None.

1st Quarter

Clouds:

Partially cloudy

Wind:

Low

Seeing Value:

0.00

Seeing Variability:

Seeing Source:

CTIO Seeing monitor

Sky :

2nd Quarter

Clouds:

Thin Clouds

Wind:

Low

Seeing Value:

2.50

Seeing Variability:

0.4

Seeing Source:

The Telescope I used

Sky:

3rd Quarter

Clouds:

Clear

Seeing Value:

2.70

Seeing Variability:

0.4

Seeing Source:

The Telescope I used

Sky:

4th Quarter

Clouds:

Clear

Seeing Value:

2.70

Seeing Variability:

0.4

Seeing Source:

The Telescope I used

Sky:

Delete
Edit

Program:

Proposal:

2012B-0001

Target of Oportunity:

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:

frieman@fnal.gov [1]

Institution:

DES

Instrument:

CTIO 4m DECam

Organization:

NOAO

Total Program Time:

Delete [2]
Edit [3]

Add [4]

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