ENR CTIO Blanco 4-m 2014-11-30

*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 16:30 (local): clear sky, 13.0C , wind 15 mph, humidity 42%

# at sunset 20:30 local: 

# 22:00, after starting OCS: 9.7C, wind 11mph, humidity 32% 

# NOTE: mirror temp significantly lower than outside temp (about -2C)

# 11:15 local: oddly enough, temp drifted downward to 10.1, then jumped back up at around 11:15 to 10.8!  wind steady at around 10mph

# 12:15 local: temp drifting down again, 10.6C, wind 14mph, humidty 31%

# 02:30 local: temp stabilizing at 10.0C, wind 7mph, humidity 25%

# 04:10 local: temp 9.5C, wind 6 mph, humidity 30%

# 05:25 local: temp 10.1, wind 10 mph, humidity 35%

 

# weather summary: mostly clear, 9-13C, humidity 20-35%

# Seeing conditions: ~0.9 to 1.5, jumpy early, steady in middle, rising at end

# Wind conditions: wind 5-15 mph

 

*Accomplishments*

 

# Afternoon: SISPI restarted, zeros done, (YziVRrgu) dome flats done, flats checked OK

# Afternoon: SISPI restarted again (to pick up changes OCS put in by Eric)

# Dome opened around 19:30 local

# At 21:00 local (after sunset) 9.7C, wind 11.5mph, humidity 39% 

# NOTE: Windscreen up from BEGINNING of night

# Zero point Correction: RA Offset -8.2, Dec Offset -0.1

# Begin of night: Standards 

## SDSS J0320-0000

## SDSS J2140-0000

## SDSS J0100-0000

# 21:43 local: start ObsTac queue; SUPERNOVAE (last night's data not good)

# SN field E1 (griz), seeing g=1.12", r=1.00"

# NOTE: primary mirror still about 1deg COLDER than outside air (good!)

# SN field E2 (griz), seeing g=1.10", r=1.05"

# SN field X2 (griz), seeing g=1.23", r=1.09", z=1.03"

# SN field C3 (z), seeing z=1.00"

# SN field C2 (griz), seeing g=1.32", z=1.14"

# SN field C1 (griz), seeing g=1.39", z=0.91"

# NOTE: primary mirror cooling turned off at 12:15 local (image 383146)

# 00:35 local: CHANGE TO WIDE-FIELD SURVEY observations

# start in Y band (due to bright moon), mostly Y with some z mixed in

# seeing around 0.9" to 1.0" for most of Y and z images

# as Moon sets, sky still completely clear!

# survey exposures: i/r/g bands starting at 03:00 local

# moon set at 03:08 local

# End of night: Standards (05:25 local)

## SDSS J1048-0000

## SDSS J0843-0000  

 

 

*Problems tagged as Synopsis_Problem*

 

# Rasicam: off

# DIMM: on

 

 

*Minor Problems and Relevant Information*

 

# primary mirror cooling time extended into night;

# cooling turned off at 12:15 local, 

# before turning off mirror cooling (at 12:15), 

## mirror (pmas_temp) was 1.5 degrees COLDER than outside_temp, and 2.5 degrees COLDER than lowdome_temp

# one hour after turning off mirror cooling (1:15)

## mirror (pmas_temp) rose to EQUAL outside_temp, still about 1 degree colder than lowdome

# two hours after turnning off mirror cooling (2:15)

## mirror (pmas_temp) still rising, now about 0.7 degree warmer than outside_temp, but still about 0.5 degrees colder than lowdome_temp.

# see plot in E-log!

 

*Notes for Data Management*

 

# clear, variable seeing from 0.9 to 1.4"

# data should be good!