David's Astronomy Pages
Notes - Session 108 (2006-01-01)

Previous Notes
Notes
(S107)
  Home
Notes
(Main)
  Home
Home
Page
  Next Notes
Notes
(S109)
 
Bullet Sky Conditions
Bullet Impact of Light Dew/Condensation on Faint Galaxy
Bullet Use of Log brightness scaling / False Colour by highlighting detail in faint galaxies
 
>

Goto Images from 2006-01-01


Sky Conditions

Sky Condition Summary (Session S108)
Image
Image
Image

Notice 
1)  

 

  

Sky Conditions Chart (S108)
Image

Back to Top


Impact of Light Dew/Condensation on Faint Galaxy

The impact of just a light dew / condensation on ability to image a faint galaxy is shown by the following frames of irregular galaxy NGC 1156.

NGC 1156  -  Light dew on front lens of scope NGC 1156  -  Front lens cleared of dew
 Image  Image
 CCD Image 
120s, clear filter
2006-01-02 00:42h UT (#108109)
  CCD Image 
120s, clear filter
2006-01-02 00:49h UT (#108112)

Back to Top


Use of Log brightness scaling / False Colour by highlighting detail in faint galaxies

Logarithmic scaling and false colour was used to highlight detail in images of several galaxies recorded during the S00108 session. The following example shows the spiral galaxy M109.

M109  -  Normal Image M109 - Log brightness scaling & False Colour
 Image  Image
  CCD Image 
6 x 2 min (average combine), clear filter
2006-01-02 01:12h UT (#108113-18)
 CCD image as left 
with log brightness scaling & false colour (inverse spectrum)

Back to Top


This Web Page: CCD Image Notes - (2006-01-01)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site