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

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Images (S478)

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Session Notes

C/2009 P1 (Garradd) - Comet M101 - Spiral Galaxy with Supernova 2011fe     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°C then fallinmg again to 7.0° C (minimum)  - CCD operation -25°C (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)

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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M101 - Spiral Galaxy with Supernova 2011fe

M101 with SN 2011fe  (Ursa Major) SN 2011fe (= PTF11kly) (Type Ia) was discovered 2011/08/24.00 by Palomar Transient Factory Discovery Magnitude 17.2 ( Rochester Supernova site | Discovery Image | TNS 2011fe ) (Possible query on precise time of discovery ?) 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.   SN 2011fe is marked by the white cross hair.  Est Mag +13.4
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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