Log Book Entry No.142

Created: 15 Mar 2017 19:46:56

Last Revised: 16 Mar 2017 00:07:38

LaurieNevay

H-Alpha observation

H-Alpha observation

• Coolers on around 17:45
• Visibility very good
• Camera 1 -10C
• Camera 2 -15C
• Aligned to Alderbaran

Candidates

• Andromeda
• Orion
• Cone
• Rosette

• Pinwheel - highest

Data

• Andromeda 30s exposure
• Andromeda 180s exposure - peak ADC 35000 - bkg 13000
• Andromeda 400s exposure - no auto dark - h-alpha(woo!) - peak ADC 3200 - bkg 1900 - ratio is 13.0
• Cone nebula, tracking with main scope 0.5s
• Cone nebula 400s - h-alpha - 4 exposures
• Adjust autoguider to agressiveness 4 for last of 4 only.
• Cooler to minus 20 - 72% power usage
• 21:15
• Cooler could only reach -23C - set back to -20 so it's not saturated. Let settle.

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• 20170315_cone_nebula.zip: Exposures of Cone nebula

• 20170315_andromeda.zip: Exposures of Andromeda

• 20170315_flats_01.zip: Flat exposures batch 1/9

• 20170315_flats_02.zip: Flat exposures batch 2/9

• 20170315_flats_03.zip: Flat exposures batch 3/9

• 20170315_flats_04.zip: Flat exposures batch 4/9

• 20170315_flats_05.zip: Flat exposures batch 5/9

• 20170315_flats_06.zip: Flat exposures batch 6/9

• 20170315_flats_07.zip: Flat exposures batch 7/9

• 20170315_flats_08.zip: Flat exposures batch 8/9

• 20170315_flats_09.zip: Flat exposures batch 9/9