David's Astronomy Pages CCD Images - Session 477 (2011-08-25)

Images (S476)

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Images (S478)

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Session Notes

M101 - spiral galaxy with supernova 2011fe C/2009 P1 (Garradd) - Comet Variable Stars 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 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.
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
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)

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

False Colour CCD Image (50% size) Square root scaling, Inverse Spectrum colour bar Image details as above

CCD Image (75% size) Square root scaling Image details as above

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Variable Stars

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