David's Astronomy Pages
CCD Images - Session 473 (2011-04-30)

Objects Session Notes
Bullet NGC 3972 - Spiral Galaxy with Supernovae SN2011by
Bullet UGC 4985 - Spiral Galaxy
Bullet Variable Stars
Bullet Photometric Monitoring - Variables
- FS Aur, KR Aur, SY Cnc, R CrB, AM CVn, RS CVn, CI Cyg, S Cyg, SS Cyg, U Gem, AM Her, SS Her, U Her, BL Lac, RZ LMi, CY Lyr, GK Per, ER UMa, SU UMa

Bullet Astrometric Monitoring - Nearby Stars
- CN Leo
- Evening  session (3.0 hrs)
- Session operated under semi-automated control, with remote monitoring from indoors computer. 
- Ambient Temperature: +0.5 deg C (minimum) 
- CCD operation -25 degC (at 68% average cooling).  
- main objectives of the session was to acquire images of selected project stars for ongoing photometric analysis.

NGC 3972 - Spiral Galaxy  with Supernovae SN2011by

NGC 3972 with SN 2011by  (Leo)

SN 2011by (Type Ia) was discovered 2011/04/26.823 by Zhangwei Jin and Xing Gao
Magnitude at discovery +14.2
(Rochester Supernova site | Discovery Image )

Image below (2011-04-30.93) was taken 4.0 days after SN discovery.
Est Mag +13.3
SN 2011by is marked by white cross hair

Image
CCD Image (cropped)
5 x 90 sec exposure (average combine), 3x3 binning, C Filter 
2011-04-30 22:14 h UT  (#473037-41)
12" LX200R  (at f/9.7) + ST-10XME

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UGC 4985 - Spiral Galaxy

UGC 4985  (Leo)

Image
CCD Image (cropped, 100% size)
4 x 120s exposure (average combine), 3x3 binning, C Filter 
2011-04-06 00:08 hUT (#473165-68)
12" LX200R  (at f/9.7) + ST-10XME

   

UGC 4985 - Earlier Image (2011-04-06)
UGC 4985 with PSN J09225262+2159157 (=SN 2011be,  = SNHunt46)   (Leo)

Image
Annotated CCD Image (cropped, 100% size)
120s exposure (single frame), 3x3 binning, C Filter 
2011-04-06 00:08 hUT (#466098)
12" LX200R  (at f/9.7) + ST-10XME

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Variable Stars

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