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CCD Images - Session 254 (2008-01-17)

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Objects Session Notes
Bullet NGC 2770 - Spiral Galaxy & Supernovae 2007uy and 2008D
Bullet NGC 3978 - Spiral Galaxy
Bullet UGC 3611 - Spiral Galaxy & Supernova 2008C
Bullet Astrometric & Photometric Monitoring
- SS Cyg, U Gem (dwarf nova)
- BL Lac (Blazar)
- TT Ari, RX And, Z And (variables)



- Late evening session (2.7hr + 1 hr for telescope tuning).
- CCD operation of -25 degC (at 64% average cooling). 
- main objectives were a) to acquire images of certain selected stars of ongoing photometric and astrometric analysis, in particular SS Cyg and b) record further follow-up images of 2 supernovae in NGC 2770. 
- a polar misalignment issue introduced two sessions ago was examined at the end of the imaging run using the Drift Method and a 6 arc min clockwise adjustment was made to the telescope mount. Cloud prevented a check on the polar axis inclination.
- PEC (RA) training was performed using 3 x 8 minute autoguided runs. 

NGC 2770 - Spiral Galaxy & Supernovae 2007uy and 2008D

NGC 2770 (Lynx) with SN 2007uy & SN 2008D

Image
CCD Image
7 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-01-17 23:28 hUT (#254060-67)
 

NGC 2770 with SN 2007uy & SN 2008D - detail

Image below (2008-01-17.98) was taken 
17.3 days after 2007uy discovery &
6.6 days after 2008D discovery
2007uy : mag +14.8 (C)
2008D : mag  too faint to measure

 Image
Annotated CCD Image (250% size)
Image details as above
 

2007uy (Type 1b) was discovered 2007/12/31.669 by Yoji Hirose
Magnitude at discovery was  +17.2 (C filter). 
(Rochester Supernova site | Discovery Image | Reference Image)

2008D (Type 1c) was discovered 2008/01/11.42 
by Lick Observatory Supernova Search
Magnitude at discovery was  +17.5 (C filter). 
(Rochester Supernova site | Discovery Image | Reference Image)

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NGC 3978 - Spiral Galaxy

NGC 3978 (Ursa Major) 
A +19 mag Supernova 2008I (discovered 2008/01/02.54 by Lick Observatory Supernova Search)
(Rochester Supernova site | SN 2008I discovery Image | Reference Image)

NGC 3978 (catalog mag +12.4), NGC 3975 (catalog mag +15.3), 
PGC 37534 (catalog mag +17.0)

Image
Annotated CCD Image
5 x 180s exposure (average combine), 2x2 binning, C Filter 
2008-01-17 23:56 hUT (#254076-80)

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UGC 3611 - Spiral Galaxy & Supernova 2008C

UGC 3611 (Gemini) with SN 2008C
2008C (Type 1a) was discovered 2008/01/03.27 by Tim Puckett, R. Gagliano and Jack Newton
Magnitude at discovery was  ? +14.9
(Rochester Supernova site | Discovery Image | Reference Image)

Image below shows UGC 3611 (small galaxy) within star field in Gemini

Image
Annotated CCD Image
5 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-01-18 00:12 hUT (#254083-87)
 

UGC 3611 with SN 2008C - detail

Image below (2008-01-18.11) was taken 15 days after 2008C discovery 
SN position is too close to UGC 3611 centre to be separately resolved in this image.
Combined magnitude (galaxy centre + SN2008C) is +14.1 (C)

 Image
CCD Image (250% size)
5 x 120s exposure (average combine), 2x2 binning, C Filter 
2008-01-18 00:12 hUT (#254083-87)

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Astrometric and Photometric Monitoring

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This Web Page: CCD Images - Session 254  (2008-01-17)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site