David's Astronomy Pages CCD Image Notes - Session 54 (2003-11-21)

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Notes (S00054)

Session was conducted on 2003-11-21 in between very bright auroral displays on 2003-11-20 and auroral activity on 2003-11-22.  Imaging was from a temporarily mounted  telescope /  roughly aligned on the Pole Star
(TPoint indicated that the scope's polar alignment had been out by 1.1 deg in azimuth and out by 0.6 deg in altitude).  
(cf 2003-10-17 - out by 0.8 deg in azimuth and out by 1.2 deg in altitude).  

During the session ice crystals quickly developed on the CCD chip or window, which severely reduced the value of images collected. In addition dew formed on the front corrector lens of the scope. Nevertheless the session was useful for testing CCD/Telescope control scripts.

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M33 - Spiral Galaxy (Pinwheel Galaxy)

M33 (Triangulum)

CCD Image , 2 x 300 sec exposure (average)  2003-11-21 (#54081-82) 'black hole' is caused by ice crystals on the CCD chip (dessicator in need of drying out)

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M1 Crab Nebula

M1 (Taurus)

CCD Image, 4 x 300 sec exposure (average) 2003-11-21 (#54077-80)

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Sky Brightness Survey

Instead of a sky brightness survey of specific azimuths (eg South), data from all images was analyzed to provide a semi-quantitative comparison with earlier images.

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