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CCD Images - Session 482 (2011-11-01)

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Objects Session Notes
Bullet M101 - spiral galaxy with supernova 2011fe
Bullet C/2009 P1 (Garradd) - Comet
Bullet NGC 6742 - Planetary Nebula (Abell 50)
Bullet PN G75.5+1.7- Planetary Nebula ("Soap Bubble Nebula")
Bullet Abell 4 - Planetary Nebula
Bullet Variable Stars
Bullet Photometric Monitoring - Variables
- RX And, U And, TT Ari, CI Cyg, S Cyg, SS Cyg, BL Lac, CY Lyr, DY Per, GK Per

- W And, Z And attempts (failed due to cloud)
Bullet Astrometric Monitoring - Nearby Stars
 61 Cyg, Ross 248 (HH And), Groombridge 34
- Evening session (4.6 hrs), cut short due to wind
- Session operated under semi-automated control, with remote monitoring from indoors computer.   Observatory laptop froze on one occasion requiring a restart - reason unknown.
- Ambient Temperature: Falling to 4.5 deg C (minimum)  before climbing to 6.5 degC
- CCD operation -20 degC (at 60% 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 and image certain challenge & gallery objects

-

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 )

Normal Image of M101 with supernova 2011fe Spectral Image of M101 with supernova 2011fe
Image Image
Annotated CCD Image (50% size)
12 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-11-01 19:13 h UT  (#482011-22)
12" LX200R  (at f/9.7) + ST-10XME
Annotated Spectral CCD Image (17% size)
4 x 90 sec exposure (average combine), 
3x3 binning, S Filter (Star Analyser 100)
2011-11-01 19:26 h UT  (#482024-27)
12" LX200R  (at f/9.7) + ST-10XME

 

Image
Spectral CCD Image (100% size, rotated, cropped)
Images details as above right

 

Image
Spectral Profile - uncalibrated
(produced using RSpec Software

 

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
Images of M101 with supernova 2011fe
Image New Image (+70d)
2011-11-01.85
70 days after SN discovery
SN Est. Mag 
+11.9

Annotated CCD Image 
(58% size, cropped)
12 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-11-01 19:13 h UT  (#482011-22)
12" LX200R  (at f/9.7) + ST-10XME

 

Image Earlier Image (+65d)
2011-10-27.85
65 days after SN discovery
SN Est. Mag 
+11.7

Annotated CCD Image 
(58% size, cropped)
12 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-10-27 20:20 h UT  (#481008-19)
12" LX200R  (at f/9.7) + ST-10XME

 

Image Earlier Image (+54d)
2011-10-16.83
54 days after SN discovery
SN Est. Mag 
+11.2

Annotated CCD Image 
(58% size, cropped)
7 x 60 sec exposure (average combine), 
3x3 binning, C Filter 
2011-10-16 20:00 h UT  (#480169-78)
12" LX200R  (at f/9.7) + ST-10XME

 

Image Earlier 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)

Image
CCD Image (50% size)
4 x 30 sec exposure (average combine), 3x3 binning, C Filter 
2011-11-01 20:00 h UT  (#482042-47)
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

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NGC 6742 - Planetary Nebula (Abell 50)

NGC 6742 / Abell 50 / PLN 78+18.1  (Draco)

Image

CCD Image (cropped)
3 x 20 sec exposure (average combine), 3x3 binning, C Filter 
2011-11-01 20:28 h UT  (#482084-88)
12" LX200R  (at f/9.7) + ST-10XME

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PN G75.5+1.7 - Planetary Nebula (" Soap Bubble Nebula")

PN G75.5+1.7  (Cygnus)
Faint indications of near-spherical shell of gas are just visible in this Ha image
The shell defines the planetary nebula PN G75.5+1.7 that was discovered 
by D. M. Jurasevich in 2007. 

Image

CCD Image (cropped)
4 x 120 sec exposure (average combine), 3x3 binning, C Filter 
2011-11-01 20:45 h UT  (#482101-07)
12" LX200R  (at f/9.7) + ST-10XME

 

PN G75.5+1.7  in normal light 
no indication of nebula through C Filter

Image

CCD Image (cropped)
5 x 120 sec exposure (average combine), 3x3 binning, C Filter 
2011-11-01 20:45 h UT  (#482100-08)
12" LX200R  (at f/9.7) + ST-10XME

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Abell 4 - Planetary Nebula

Abell 4 / PLN 144-15.1 (Perseus)
Abell 4 is the faint planetary nebula at centre of image (catalog mag +16.7)
Near it is an edge-on spiral galaxy PGC 2201333  (catalog mag +17.1)
Bright star is SAO 38305/HD 17052 (catalog mag +8.69)

Image

CCD Image (cropped)
6 x 60 sec exposure (average combine), 3x3 binning, C Filter 
2011-11-01 21:51 h UT  (#482158-67)
12" LX200R  (at f/9.7) + ST-10XME

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Variable Stars

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This Web Page: CCD Images - Session 482 (2011-11-01)
Last Updated : 2015-05-16
Site Owner : David Richards
Home Page : David's Astronomy Web Site