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Topics - RickS

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1
A colourful SHO image and a not too shabby LRGB with slight NB enhancement. The data was captured from the inner suburbs of a largish city so I wasn't expecting much from the RGB!

Tech details...

Scope: FSQ-85ED 0.73x reducer = 325mm FL
Mount: AP900
Camera: ZWO ASI1600mm Pro (gain 200, temp -15C)
Filters: Chroma LRGB, 3nm NB
Image scale: 2.36 arcsec/pixel
Exposures: 143x30s R, 139x30s G, 128x30s B, 238x120s Ha, 93x120s Oiii, 73x120s Sii (16.9 hours)
Processing: PixInsight 1.8.6




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Gallery / Wide Ha test image: from M42 to the Horsehead
« on: 2018 November 18 01:38:12 »
Testing my new Borg 55FL f/3.6 scope with ASI1600mm Pro camera unguided on a Star Adventurer mount.  922 x 30 second subs and 90 x 2 second.  Chroma 3nm Ha filter.  I'm pleased with how deep it went.  Still some tweaking to do on camera spacing and I should put more effort into polar alignment :)


3
Gallery / Spiral galaxy NGC 6744 in Pavo
« on: 2018 July 29 03:17:56 »
NGC 6744 is a Milky Way-like spiral galaxy approximately 30 million light-years away in the Southern constellation of Pavo. The satellite galaxy at approximately 11 o'clock is NGC 6744A.

Captured at Heaven's Mirror observatory (Martin Pugh) at Yass, NSW.

Scope: Planewave CDK17 @ f/6.8 = 2939mm FL
Mount: Paramount ME
Camera: SBIG STXL-11002/AOX
Filters: Astrodon LRGB gen II, 3nm NB
Image scale: 0.63 arcsec/pixel
Exposures: 6x1200s R, 15x1200s G, 15x1200s B, 21x1200s L, 12x1800s x2 Ha (26 hours)
Processing: PixInsight 1.8.5


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Gallery / M83, the Southern Pinwheel
« on: 2018 June 14 04:18:13 »
M83 data from Martin Pugh, processing by yours truly.

Scope: Planewave CDK17 @ f/6.8 = 2939mm FL
Mount: Paramount ME
Camera: SBIG STXL-11002/AOX
Filters: Astrodon LRGB gen II, 3nm NB
Image scale: 0.63 arcsec/pixel
Exposures: 14x1200s R, 13x1200s G, 15x1200s B, 21x1200s L, 5x1800s x2 Ha (23.5 hours)
Processing: PixInsight 1.8.5


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Gallery / Centaurus A
« on: 2018 May 21 02:47:47 »
NGC 5128 or Centaurus A is one of the closest radio galaxies to Earth at a distance of approximately 12 million light-years. It has a distinctive central dust lane and an active galactic nucleus containing a supermassive black hole creating a relativistic jet which emits in visual, radio and X-ray wavelengths. The inner and outer filaments of the optical jet are visible here as the red streaks between 2 and 3 o'clock. It is an unusual galaxy, possibly the result of a merger between an elliptical galaxy and a smaller spiral galaxy.

Scope: Planewave CDK17 @ f/6.8 = 2939mm FL
Mount: Paramount ME
Camera: SBIG STXL-11002/AOX
Filters: Astrodon LRGB gen II, 3nm NB
Image scale: 0.63 arcsec/pixel
Exposures: 15x1200s R, 15x1200s G, 15x1200s B, 22x1200s L, 11x1800s Ha (27.83 hours)
Processing: PixInsight 1.8.5

Acquisition: Martin Pugh
Processing: Rick Stevenson


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Gallery / The heart of IC 2944, the Running Chicken Nebula
« on: 2018 April 28 03:03:47 »
IC 2944, aka the Running Chicken Nebula, is an emission nebula associated with an open star cluster in the constellation Centaurus.  Near the centre are Thackeray's Globules - a group of Bok Globules comprised of dense cosmic dust and gas.  Bok Globules are often a site of star formation but not in this case.

Captured at Yass, Australia 5-24 April, 2018.

Scope: Planewave CDK17 @ f/6.8 = 2939mm FL
Mount: Paramount ME
Camera: SBIG STXL-11002/AOX
Filters: Astrodon LRGB gen II, 3nm NB
Image scale: 0.63 arcsec/pixel
Exposures: 14x1800s Ha, 14x1800s Oiii, 14x1800s Sii (21 hours)
Processing: PixInsight 1.8.5

Acquisition: Martin Pugh
Processing: Rick Stevenson


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Gallery / Leo Triplet - yes, another one :)
« on: 2018 April 23 03:55:31 »
Everybody images it, especially in the Northern Hemisphere. I think this one stands out a bit due to the quality of the data - provided by the wonderful Drs Jim & Linda Powell who are kind enough to share with me (and even image targets that I suggest.)

Captured at DSW New Mexico, Mar-Apr 2018

Objects in image:
NGC3628 with its lovely tidal tail, M65, M66, various smaller IC & PGC galaxies

Scope: TEC 160FL FL=1152.68mm
Mount: Paramount ME
Camera: SBIG STXL-16200
Filters: Astrodon
Image scale: 1.069 arcsec/pixel (Drizzled up)
Exposures: 16x1200s R, 15x1200 G, 15x1200s B, 80x900s L (35.3 hours)
Processing: PixInsight 1.8.5

Acquisition: Drs Jim & Linda Powell
Processing: Rick Stevenson


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Gallery / NGC 2736 - the Pencil Nebula aka Herschel's Ray
« on: 2018 April 08 03:21:40 »
NGC 2736, aka the Pencil Nebula or Herschel's Ray, is a small section of the Vela Supernova Remnant approximately 800 light-years from Earth in the Southern constellation of Vela. It glows brightly due to ionised Hydrogen (red) and Oxygen (blue/green) where the shock wave from the supernova has ploughed into interstellar gas clouds. The original, violent death of the star which went supernova took place approximately 11,000 years ago.

Data captured by Martin Pugh with his CDK17 at Yass. Process by yours truly with PixInsight 1.8.5.

Scope: Planewave CDK17 @ f/6.8 = 2939mm FL
Mount: Paramount ME
Camera: SBIG STXL-11002/AOX
Filters: Astrodon LRGB gen II, 3nm NB
Image scale: 0.63 arcsec/pixel
Exposures: 3x600s R, 3x600s G, 3x600s B, 14x1800s Ha, 14x1800s Oiii (15.5 hours)


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Gallery / The Whale, Pup and Hockey Stick galaxies from SRO
« on: 2018 March 30 02:28:53 »
NGC 4631, the Whale Galaxy, is the edge-on barred spiral galaxy at bottom left of the full field. It is approximately 30 million light-years from Earth in the constellation Canes Venatici. Beneath NGC 4631 is its close companion the dwarf elliptical galaxy NGC 4627, also known as the Pup. NGC 4631 has a core of older, yellow stars surrounded by young blue stars. It has a dark equatorial dust lane and many emission nebulae glowing with the magenta of ionished Hydrogen. The central region of the galaxy is a starburst region where new stars are rapidly forming.

At top right of the field is the highly distorted pair of interacting galaxies NGC 4656 and NGC 4657, also known as the Hockey Stick Galaxies.

These galaxies are all members of the NGC 4631 group.

Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson
Processing credit & copyright: Rick Stevenson

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Focuser: Atlas
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel (Drizzled/downsized)
Exposures: 34x1200s R, 28x1200s G, 36x1200s B, 85x600s L, 55x1800s H (74.3 hours)
Processing: PixInsight 1.8.5

Crop of NGC 4631/4656:


Complete FOV:


Stellar streams associated with NGC 4631:

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Gallery / NGC 1333 - taken with 3 scopes over 3 years
« on: 2018 March 19 02:34:31 »
NGC 1333 contains a delightful mix of blue reflection nebulosity, dark mysterious dust and red Hydrogen alpha emission.  It is an active region of star formation and part of the nearby (approx 1,000 light-years) Perseus OB2 molecular cloud complex.  It is rich in young stellar objects (YSOs) and Herbig-Haro objects.  It contains many new stars, less than a million years old, that are hidden by dust and only visible in infrared.

The data for this image was captured from three different telescopes between 2015 and 2018.

Jim & Linda Powell's TEC160FL scope/STXL-16200 camera: captured at DSW, Jan to Mar 2018 (21.25 hours LRGB + Ha)
DSW RCOS 14.5" team/SBIG STX-16803 camera: captured at DSW, Oct 2017 to Jan 2018 (24.5 hours LRGB)
SRO Ceravolo 300/FLI PL16803 camera: captured at SRO, Nov-Dec 2015 (7.6 hours Lum & red only)

Acquisition credit: Jim & Linda Powell, John Kasianowicz, Daniele Malleo, Leonardo Orazi, Rob Pfile, Rick Stevenson and Jerry Yesavage.
Processing credit and copyright: Rick Stevenson (PixInsight, of course...)


11
Gallery / CTB 1 - supernova remnant in Cassiopeia
« on: 2018 February 19 03:19:30 »
As a follow on to the CTA 1 I posted recently...

Supernova remnant CTB 1 in Cassiopeia is the remains of a violently exploding star. It's approximately 10,000 light-years away and occurred between 7,500 and 11,000 years ago.

Captured at SRO California, Aug-Nov, 2017.

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Filters: Astrodon
Image scale: 1.26 arcsec/pixel (Drizzled to double res)
Exposures: 11x300s R, 11x300s G, 11x300s B, 49x1800s Ha, 53x1800 Oiii, 55x1800s Sii (total: 81.25 hours)
Processing: PixInsight 1.8.5

Processing credit: Rick Stevenson
Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson


12
Gallery / HFG1 and Abell 6 in HaOiiiRGB
« on: 2018 February 05 23:28:48 »
A couple of planetary nebulae, Heckathorn-Fesen-Gull 1 at lower left and Abell 6 at top right.

Captured at SRO, Aug-Dec, 2017

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel (Drizzled to double res)
Exposures: 19x300s R, 20x300s G, 22x300s B, 50x1800s Ha, 49x1800s Oiii (~55 hours)
Processing: PixInsight 1.8.5

Processing credit: Rick Stevenson
Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson


13
Gallery / Hickson compact groups 93 (aka Arp 99) and 94
« on: 2018 February 02 00:24:56 »
HCG93 at centre, HCG94 at approx 5 o'clock.  Also quite a lot of IFN.

Captured at SRO, Sep-Nov, 2017

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel (Drizzled to double res)
Exposures: 27x1200s R, 28x1200s G, 31x1200s B, 51x600s L (37.16 hours)
Processing: PixInsight 1.8.5

Processing credit: Rick Stevenson
Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson


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Gallery / Supernova remnant CTA 1
« on: 2018 January 09 02:49:21 »
A large but very dim target. This one has been kicking my processing butt for a few months but I think I've finally made something of the 70 hours of data. Thanks to Sakib Rasool for suggesting it as a target... maybe I did something to upset him and this was his revenge :)

There's a bright planetary, NGC 40, at approximately 8 o'clock that's unrelated to the SNR. CTA 1 also contains the the first ever high magnetic field pulsar to be discovered through its gamma-ray pulsations, PSR J0007+7303, but sadly it didn't appear to be visible in this image.

Captured at SRO, Apr-Dec, 2017

Objects in image:
CTA 1, NGC 40, PSR J0007+7303?

Scope: Ceravolo C300 @ f/4.9 = 1470mm FL
Mount: AP1100
Camera: FLI PL16803
Focuser: Atlas
Filters: Astrodon
Guiding: Lodestar II / Tak guide scope
Image scale: 1.26 arcsec/pixel (Drizzled to double res)
Exposures: 12x300s R, 9x300s G, 12x300s B, 64x1800s Ha, 70x1800 Oiii (69.75 hours)
Processing: PixInsight 1.8.5

Acquisition credit: Scott Johnson, Augusto Hernandez, John Kasianowicz, Daniele Malleo, Jose Mtanous and Rick Stevenson

Processing credit: Rick Stevenson


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Gallery / NGC 1760, aka the Angry Bee, in HaOiiiSiiRGB
« on: 2017 December 29 22:13:58 »
A complex of emission nebulae and the second-largest star forming region in the LMC.

Captured at Yass 11 Sep - 21 Dec, 2017 (Martin Pugh's obsy)

Scope: Astro-Physics RH305 @ f/3.8 = 1119mm FL
Mount: Paramount ME II
Camera: SBIG STXL-16200M
Filters: Astrodon
Image scale: 1.106 arcsec/pixel
Exposures: 3x600s + 12x1200s R, 3x600s + 12x1200s G, 8x600s + 8x1200s B, 20x1800s Ha, 21x1800s Oiii, 18x1800s Sii (42.5 hours)
Processing: PixInsight 1.8.5


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