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CCD Images - Session 176 (2007-02-17)

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Images (S177)
 
Objects Session Notes
Bullet Mira - variable star
Bullet PLN 217+14 - Planetary Nebula
Bullet NGC 3344 - Spiral Galaxy
Bullet NGC 3521 - Spiral Galaxy
Bullet Astrometric & Photometric Monitoring
- SS Cyg, U Gem, (dwarf novae)
- HIP 4429 (suspected variable)
- U And, W And, Mira (Mira variables)
- Z And, DV UMa, ER UMa, U Mon, RZ LMi  (variables)
- BL Lac (BL Lac blazer)
- HH And, Groombridge 34 (Nearby Stars)
- AXP 1E 2259+586, AXP 4U 0142+615 (AXP stars)

3.8 hr session cut short by deteriorating sky conditions
- CCD operation of -25 degC (at 69% average cooling). .
- the other main objective was to acquire images for photometric monitoring of the variables stars U And, W And, SS Cyg and a suspected variable HIP 4429.
- opportunity was taken to acquire some exploratory images of U Gem, RZ LMi and DV UMa which may be added to future variable star monitoring.
- More Notes
-

Mira - variable star

Mira (Cetus) - prototype Mira variable

 
 Images of Mira though BVRI filters showing distinct brightening 
compared with images from 74 days earlier 

(artifacts are caused by extreme brightness of the star, 
as light passes through the telescope's optics)
Image Image
CCD Image Montage
 (BVRI filter bands)
2x2 binning, cropped 
2006-12-05 21:57h UT 
(#158169-72)
CCD Image Montage
 (BVRI filter bands)
2x2 binning, cropped 
2007-02-17 20:19h UT 
(#176040-43)

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PLN 217+14 - Planetary Nebula

PLN 217+14  (Canis Minor) 

Image 

CCD Image 
5 x 120s exposure (average combine), 2x2 binning, C filter,  
2007-02-17 21:51h UT (#176124-28)

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NGC 3344 - Spiral Galaxy

NGC 3344 (Leo Minor) 
Hidden Treasures 55
[ Hidden Treasures ]

Image 

CCD Image 
7 x 180s exposure (average combine), 2x2 binning, C filter,  
2007-02-18 00:01h UT (#176211-17)

 

NGC 3344 - false colour 

Image 

CCD Image
Log brightness scaling, Inverse Spectrum
(details as above)

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NGC 3521 - Spiral Galaxy

NGC 3521 (Leo) 
Hidden Treasures 55
[ Hidden Treasures ]

Image 

CCD Image 
7 x 180s exposure (average combine), 2x2 binning, C filter,  
2007-02-18 00:25h UT (#176221-27)

 

NGC 3521 - false colour 

Image 

CCD Image
Square Root brightness scaling, Inverse Spectrum
(details as above)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 176 (2007-02-17)
Last Updated : 2023-04-17
Site Owner : David Richards
Home Page : David's Astronomy Web Site