David's Astronomy Pages
CCD Images - Session 479 (2011-10-03)

Objects Session Notes
Bullet M101 - spiral galaxy with supernova 2011fe
Bullet C/2009 P1 (Garradd) - Comet
Bullet Variable Stars
Bullet Photometric Monitoring - Variables
- R CrB, U Her, CY Lyr, FG Sge, U Sge

- CI Cyg, S Cyg, SS Cyg, AM Her, BL  Lac, V Sge attempts (failed due to wind)
Bullet Astrometric Monitoring - Nearby Stars
- 61 Cyg attempt (failed due to wind)
- Evening session (2.2 hrs), windy, cut short due to wind
- Session operated under semi-automated control, with remote monitoring from indoors computer. 
- Ambient Temperature: 6.5 deg C (minimum) 
- CCD operation -20 degC (at 65% average cooling).  
- main objective of the session to obtain follow-up images of bright supernovae in nearby galaxy M101

secondary objective was to image project stars for ongoing photometric analysis

-

M101 - spiral galaxy with supernova 2011fe

M101 with supernova 2011fe  (Ursa Major)
SN 2011fe (= PTF11kly) (Type Ia) was discovered 
2011/08/24.00 by Palomar Transient Factory
Magnitude at discovery +17.2
(Rochester Supernova site | Discovery Image )

SN 2011fe is reported as being the 
nearest Type 1a supernova 
seen in decades
M101 with supernova 2011fe  (Ursa Major)
Image New Image (+41d)
2011-10-03.85
41 days after SN discovery
SN Est. Mag 
+10.5

Annotated CCD Image 
(58% size, cropped)
11 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-10-03 20:28 h UT  (#479003-14)
12" LX200R  (at f/9.7) + ST-10XME

 

Image Earlier Image (+37d)
2011-09-29.88
37 days after SN discovery
SN Est. Mag 
~ +11.1

Annotated CCD Image 
(58% size, cropped)
4 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-09-29 21:04 h UT  (#478008-11)
12" LX200R  (at f/9.7) + ST-10XME
Note : Poor sky transparency 
+ frost on edges of CCD

 

Image Earlier Image (+1.9d)
2011-08-25.91
~ 1.9 days after SN discovery
SN Est. Mag 
+13.4

Annotated CCD Image 
(58% size, cropped)
9 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-08-25 21:41 h UT  (#477019-28)
12" LX200R  (at f/9.7) + ST-10XME
Image Earlier Image (pre-discovery)
2009


CCD Image 
(cropped) 
9 x 60 sec (average combine),  
3x3 binning, C Filter
2009-08-24 22:00 h UT  (#386001-10)
12" LX200R  (at f/5.7) + ST-10XME

 

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C/2009 P1 (Garradd) - Comet

C/2009 P1 (Garradd)  
(moving through starfield in Hercules)
2 frames show 66 arc sec movement of the comet over a period of 77 minutes.
This corresponds to a motion of 52 arc sec/hour 

Image
CCD Image Animation (60% size, cropped)
3x3 binning, C Filter
Frame 1: 5x30 sec (average combine), 2011-10-03 20:39h UT (#479017-23)
Frame 2: 2x30 sec (average combine), 2011-10-03 21:56h UT (#479121-22)
12" LX200R  (at f/9.7) + ST-10XME

 

C/2009 P1 (Garradd) - detail

Image
False Colour CCD Image (50% size)
Square root scaling, Inverse Spectrum colour bar
5x 30 sec (average combine), 3x3 binning, C Filter
2011-10-03 20:39h UT (#479017-23)
12" LX200R  (at f/9.7) + ST-10XME

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Variable Stars

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