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CCD Images - Session 477 (2011-08-25)

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 (S478) 		 
Objects Session Notes
Bullet M101 - spiral galaxy with supernova 2011fe
Bullet C/2009 P1 (Garradd) - Comet
Bullet Variable Stars
Bullet Photometric Monitoring - Variables
- Z And, R CrB, AM CVn, CI Cyg, S Cyg, SS Cyg, AM Her, SS Her, U Her, BL Lac, CY Lyr, FG Sge, U Sge, V Sge
Bullet Astrometric Monitoring - Nearby Stars
- Barnards Star, 61 Cyg
- Late Evening session (2.5 hrs), Good Seeing, dew forming
- Session operated under semi-automated control, with remote monitoring from indoors computer. 
- Ambient Temperature: dropping initially to 9.0 deg C then fallinmg again to 7.0 deg C (minimum) 
- CCD operation -25 degC (at 87% average cooling).  
- main objectives of the session was to acquire images of selected project stars for ongoing photometric analysis , following 6 month observing break due mainly to poor weather.
- opportunity taken to acquire images of a newly discovered supernovae in nearby galaxy M101 and of comet C/2009 P1 (Garradd)

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.
It has brightened significantly since discovery and by 2011-08-27 had reached mag +12.3 

Image below (2011-08-25.91) was taken only ~ 1.9 days after SN discovery.  
(Possible query on precise time of discovery ?)
Est Mag +13.4
SN 2011fe is marked by the white cross hair. 
Image
Annotated CCD Image 
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
 
M101 - Earlier Image (2009)
 M101 with SN 2011fe (2011-08-25)
Supernova shown by white cross-hairs
Image Image
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 		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

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C/2009 P1 (Garradd) - Comet

C/2009 P1 (Garradd)  
(moving through starfield in Sagitta)
Image
CCD Image (50% size)
30 sec exposure (single frame), 3x3 binning, C Filter 
2011-08-25 21:25 h UT  (#477009)
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
Image details as above
 
Image
CCD Image (75% size)
Square root scaling
Image details as above

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Variable Stars

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This Web Page: CCD Images - Session 477 (2011-08-25)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site