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CCD Images - Session 279 (2008-04-02)

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Objects Session Notes
Bullet NGC 4490 - Spiral Galaxy with Supernovae 2008ax
Bullet NGC 4226 - Spiral Galaxy
Bullet Astrometric & Photometric Monitoring
- RX And, U Mon, DY Per  (variables)

- attempts on U Gem (cloud)

 

- Evening Session (1.6hr)
- CCD operation of -20 degC 
(at 66% average cooling). 
- main objective of the session was to demonstrate observatory / imaging setup to a fellow member of my local astronomy society. This was achieved despite patchy cloud.
- opportunity was taken to acquire images of certain selected stars for ongoing astrometric analysis together with images of a supernova in NGC 4490

NGC 4490 - Spiral Galaxy & Supernovae 2008ax

NGC 4490 with SN 2008ax (Canes Venatici)
2008ax (Type II) was discovered 2008/03/03.45 by LOSS; Koichi Itagaki
Magnitude at discovery +16.1 (C)
(Rochester Supernova site | LOSS Discovery Image
 | Itagaki Discovery Image | Reference Image)

Image below (2008-04-02.88) was taken 30.4 days after discovery.
SN 2008ax - Estimated Magnitude +12.4 (C)

Image
Annotated CCD Image
7 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-04-02 21:04UT (#279042-48)
  

Earlier Image of NGC 4490 & SN 2008ax
[ 2008-03-08.03, Estimated Magnitude +15.2 (C) ]

 Image
Annotated CCD Image
7 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-03-08 00:48 hUT (#273136-42)

 

Earlier Image of NGC 4490 (Pre-SN)

 Image
CCD Image
5 x 180s exposure (average combine), 2x2 binning, C Filter
2006-12-20 06:30h UT (#167511-15)

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NGC 4226 - Spiral Galaxy

NGC 4226  (Canes Venatici)
Image below (2008-04-02.89) was taken 2.5 days after discovery of 
SN 2008bn (Type II supernova), discovered 2008/03/31.42 by 
Lick Observatory Supernova Search, mag +16.5, 
(Rochester Supernova site | LOSS Discovery Image
  | Reference Image)

SN 2008bn - not visible in image below

Image
Annotated CCD Image
120s exposure, 2x2 binning, C Filter 
2008-04-02 21:17UT (#279052)
   

NGC 4226 - detail
[ no firm identification of SN2008bn ]

 Image
CCD Image (300% size scaling)
Image details as above
 

Earlier Image of NGC 4217 (centre) 
& NGC 4226 (bottom left) - 2006

Image 
 CCD Image 
3 x 2 min (average combine), clear filter
2006-01-02  01:55h UT (#108131-33)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 279  (2008-04-02)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site