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CCD Images - Session 304 (2008-09-22)

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Objects Session Notes
Bullet NGC 6550 - Spiral Galaxy
Bullet WZ Sge - variable star
Bullet Astrometric & Photometric Monitoring
- SS Cyg (dwarf nova)
- U And (mira variables)
- BL Lac (blazar)
- RX And, CY Lyr, R CrB, RU Peg, DY Per, WZ Sge (variables)
- AM Her (polar variable)
- Evening session (2.6 hrs). Coldest session so far this season (5.5 degC).. Skies deteriorated during latter part of session with high thin cloud, accompanied by 2.5 deg warming. 
- Ambient Temperature 5.5 degC Min.
(11 --> 5.5  --> 8 degC)
- CCD operation of -15 degC 
(at 57% average cooling).  
- main objective of the session was  to acquire images of key selected stars for ongoing photometric and astrometric analysis. 


Goto Notes from 2008-09-22

-

 


NGC 6550 - Spiral Galaxy

NGC 6550 (Pegasus) 
might also be known as NGC 6548 
(appears to be two spiral galaxy objects 
at the same location in TheSky, both Mag +11.7)
Image
CCD Image 
5 x 120 sec exposure (average combine),  2x2 binning, C Filter
2008-09-22 21:59 UT (#304080-84)
NGC 6550 - detail 
NGC 6550 spiral galaxy (catalog mag +11.7)
NGC 6549 spiral galaxy (catalog mag +14.6)
Image
Annotated CCD Image 
Image details as above

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WZ Sge - Variable Star

WZ Sge (Sagitta)
WZ Sge has been described as the King of Cataclysmics. 
Although outbursts are rare they are understood to be spectacular 
when they do occur, with rapid nova-like brightening and interestingly 
superhumps, eclipses and a long decay profile
[ VSNet  WZ Sge Page ]

GCVS Catalog details :UGSU+E+ZZ (+7.0 to +15.53)
Outbursts in  1978, 2001
WZ Sge - Reference Stars
Image
Annotated CCD Image 
120 sec exposure, 2x2 binning, V Filter
2008-09-22 21:20h UT (#304061)
 
WZ Sge - detail 
WZ Sge measured mag +15.2
Image
Annotated CCD Image (200% size, cropped)
3 x 120 sec exposure (average combine), 2x2 binning, V Filter
2008-09-22 21:18h UT (#304059-61) 

[for comparison see outburst image of WZ Sge by G. Masi ]
 
Earlier Images (2008-06-21)
Star field surrounding WZ Sge (Sagitta)
Image
CCD Image 
3 x 30 sec exposure (average combine), 2x2 binning, C Filter
2008-06-21 01:13h UT (#291126-30)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 304  (2008-09-22)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site