Difference: LogBookAstronomyEntry0150 (1 vs. 4)

Revision 423 Jan 2018 - AlanisCozens1

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META TOPICPARENT name="LogBookAstronomy"

Log Book Entry No.150

Days, Calendar Created: 01 Nov 2017 13:28:40 Days, Calendar Last Revised: 23 Jan 2018 19:30:36 Person AlanisCozens1 Text Solar Limb Darkening test data AC LL
Line: 14 to 12
  Weather cloudy, intermittently clear
use DSLR to take white images to look at the natural vignetting effects of the camera, took many exposure times so to get an unsaturated image. Need to process these to get a pixel vs intensity curve to show that the fractional ratio of intensity does not depend on exposure. Also look at different colour channels and create a plot to show all 3
Then set up the telescope so as to record data, fit with sun filters and imaging source camera. Using ICcapture software.
Use shadow of the telescope to align, and adjust further with finder scope.
set telescope to the west of the sun to see it passing through the window, takes around 1min to fully pass no data recorded
Use DSLR to take images of the sun, lowering the exposure times to find an unsaturated image. Use circle finder code to analyse the intensity array across a diameter of the sun.
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>		Attached Text files show the image numbers on the DSLR for varying exposure times ISO=100 for targets of the sun then a white light source evenly lit for investigating the vignetting effect.
 

Back to: LogBookAstronomy

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META FILEATTACHMENT attachment="convert_raw.py.txt" attr="" comment="code to convert raw data to tiff" date="1509546102" name="convert_raw.py.txt" path="convert_raw.py.txt" size="1267" user="zbvc446" version="1"
META FILEATTACHMENT attachment="Vignetting1.zip" attr="" comment="Correct updated vignetting images" date="1510666956" name="Vignetting1.zip" path="Vignetting1.zip" size="86877993" user="zbvc446" version="1"
META FILEATTACHMENT attachment="Vignetting2.zip" attr="" comment="Correct updated vignetting images" date="1510667019" name="Vignetting2.zip" path="Vignetting2.zip" size="79421175" user="zbvc446" version="1"
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META FILEATTACHMENT attachment="SUN_100_EXPVARY.txt" attr="" comment="Image numbers for varying exposure times Target:SUN ISO:100 DSLR" date="1516734711" name="SUN_100_EXPVARY.txt" path="SUN_100_EXPVARY.txt" size="312" user="zbvb025" version="1"
META FILEATTACHMENT attachment="VIGNETTE_100_EXPVARY.txt" attr="" comment="Image numbers for varying exposure times Target:VIGNETTE ISO:100 DSLR" date="1516735835" name="VIGNETTE_100_EXPVARY.txt" path="VIGNETTE_100_EXPVARY.txt" size="218" user="zbvb025" version="1"

Revision 314 Nov 2017 - LenaLenz1

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META TOPICPARENT name="LogBookAstronomy"

Log Book Entry No.150

Days, Calendar Created: 01 Nov 2017 13:28:40 Days, Calendar Last Revised: 23 Jan 2018 19:30:36 Person AlanisCozens1 Text Solar Limb Darkening test data AC LL
Line: 28 to 28
 
META FILEATTACHMENT attachment="white_background.zip" attr="" comment="white background images vignetting effect" date="1509544414" name="white_background.zip" path="white_background.zip" size="73494368" user="zbvc446" version="1"
META FILEATTACHMENT attachment="white_background2.zip" attr="" comment="white background images vignetting effect" date="1509545292" name="white_background2.zip" path="white_background2.zip" size="51752995" user="zbvc446" version="1"
META FILEATTACHMENT attachment="convert_raw.py.txt" attr="" comment="code to convert raw data to tiff" date="1509546102" name="convert_raw.py.txt" path="convert_raw.py.txt" size="1267" user="zbvc446" version="1"
Added:
>
>
META FILEATTACHMENT attachment="Vignetting1.zip" attr="" comment="Correct updated vignetting images" date="1510666956" name="Vignetting1.zip" path="Vignetting1.zip" size="86877993" user="zbvc446" version="1"
META FILEATTACHMENT attachment="Vignetting2.zip" attr="" comment="Correct updated vignetting images" date="1510667019" name="Vignetting2.zip" path="Vignetting2.zip" size="79421175" user="zbvc446" version="1"

Revision 201 Nov 2017 - LenaLenz1

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META TOPICPARENT name="LogBookAstronomy"

Log Book Entry No.150

Days, Calendar Created: 01 Nov 2017 13:28:40 Days, Calendar Last Revised: 23 Jan 2018 19:30:36 Person AlanisCozens1 Text Solar Limb Darkening test data AC LL
Line: 22 to 22
 
FORM FIELD Subject Subject Solar Limb Darkening test data AC LL
FORM FIELD Status Status blank
FORM FIELD Author Author TWikiGuest
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META FILEATTACHMENT attachment="data.zip" attr="" comment="images of Sun with Canon DSLR camera" date="1509543539" name="data.zip" path="data.zip" size="81743895" user="zbvc446" version="1"
META FILEATTACHMENT attachment="data2.zip" attr="" comment="images of Sun with Canon DSLR camera" date="1509544025" name="data2.zip" path="data2.zip" size="72364763" user="zbvc446" version="1"
META FILEATTACHMENT attachment="data3.zip" attr="" comment="images of Sun with Canon DSLR camera" date="1509544275" name="data3.zip" path="data3.zip" size="52174828" user="zbvc446" version="1"
META FILEATTACHMENT attachment="white_background.zip" attr="" comment="white background images vignetting effect" date="1509544414" name="white_background.zip" path="white_background.zip" size="73494368" user="zbvc446" version="1"
META FILEATTACHMENT attachment="white_background2.zip" attr="" comment="white background images vignetting effect" date="1509545292" name="white_background2.zip" path="white_background2.zip" size="51752995" user="zbvc446" version="1"
META FILEATTACHMENT attachment="convert_raw.py.txt" attr="" comment="code to convert raw data to tiff" date="1509546102" name="convert_raw.py.txt" path="convert_raw.py.txt" size="1267" user="zbvc446" version="1"

Revision 101 Nov 2017 - AlanisCozens1

Line: 1 to 1
Added:
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META TOPICPARENT name="LogBookAstronomy"

Log Book Entry No.150

Days, Calendar Created: 01 Nov 2017 13:28:40 Days, Calendar Last Revised: 23 Jan 2018 19:30:36 Person AlanisCozens1 Text Solar Limb Darkening test data AC LL 

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Time 10:30am-1pm in dome, A Cozens, L Lenz, D Bedingham, S Boogert

Weather cloudy, intermittently clear
use DSLR to take white images to look at the natural vignetting effects of the camera, took many exposure times so to get an unsaturated image. Need to process these to get a pixel vs intensity curve to show that the fractional ratio of intensity does not depend on exposure. Also look at different colour channels and create a plot to show all 3
Then set up the telescope so as to record data, fit with sun filters and imaging source camera. Using ICcapture software.
Use shadow of the telescope to align, and adjust further with finder scope.
set telescope to the west of the sun to see it passing through the window, takes around 1min to fully pass no data recorded
Use DSLR to take images of the sun, lowering the exposure times to find an unsaturated image. Use circle finder code to analyse the intensity array across a diameter of the sun.


Back to: LogBookAstronomy

META FORM name="%25SYSTEMWEB%25.LogBookForm"
FORM FIELD Subject Subject Solar Limb Darkening test data AC LL
FORM FIELD Status Status blank
FORM FIELD Author Author TWikiGuest
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