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CCD Images - Session 100 (2005-10-16)

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Objects Session Notes
Bullet Delta Cepheid - Variable Star
- 3/4 hour session, initially clear sky but, hazy with full moon. Cloud rapidly developed from SSE forcing the abandonment of the session..
- Ambient temperature 12 degC
- As this was the 100th session, it was the first time that image numbers went up from 00099999 to 00100001. This occasion uncovered a number of small issues with post-session utility and analysis tools which required software fixes to be made.
- [ Developing cloud on 2005-10-14 also interrupted an attempted observing session on 2005-10-14, during which it had been planned to acquire images of HD  209458's extrasolar planet transit ]
- More Notes

Aims of session were to record an  image sequence on RR Lyrae (to confirm the variation seen during previous session on 2005-10-08 and 2005-10-13),  additional magnitude information on Delta Cepheid, baseline image sets for BL Lac.  In the event only images of Delta Cepheid were recorded before cloud forced the abandonment of the session.

A secondary aim was to check computer/hardware after reinstalling drivers for Belkin USB-Serial device.
(no crashes occurred over 45 min period, however the session was too short to give the computer-telescope connection a real test)

Delta Cepheid - Variable Star (Cepheid)

Image sets of Delta Cepheid  & reference star SAO 34542 were recorded at around 20:15h UT,  23:05h UT (2005-10-13) and 02:25h UT (2005-10-14). Image sets comprised  7 sequences of  3 x 0.2s V & 3 x 0.6s B (alternated between Delta Cepheid & reference star)  These were analyzed using the methodology described under 2005-10-05 Notes, and combined with previous estimates

B Band Magnitude estimates for Delta Cepheid 
(Reference Star SAO 34542)
Image
Image 
  
V Band Magnitude estimates for Delta Cepheid 
Image 
  
Magnitude and colour variation in Delta Cepheid based on observations 
on 5 observing sessions between 2005-10-02 and 2005-10-16.
Image 
Further observations will be made during future sessions 
in order to further refine the light curve

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This Web Page: CCD Images - Session 100 (2005-10-16)
Last Updated : 2015-05-16
Site Owner : David Richards
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