Hickson compact groups 93 (aka Arp 99) and 94

RickS (Rick) · #1 01-02-2018, 05:58 PM

A couple of cool galaxy groups in Pegasus. These are crops from the same field which is pretty much chokkers with galaxies. Oh, and there's integrated flux nebula as well

Tech details...

Captured at SRO, Sep-Nov, 2017

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: 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

Whole field in higher res: https://www.astrobin.com/full/331663/0/

strongmanmike (Michael) · #2 01-02-2018, 06:05 PM

Aaaah galaxies...galaxies everywhere...Really nice shot Rick, that long two arm spiral looks pretty cool huh?

Mike

RickS (Rick) · #3 01-02-2018, 07:08 PM

Quote:

Originally Posted by strongmanmike

Aaaah galaxies...galaxies everywhere...Really nice shot Rick, that long two arm spiral looks pretty cool huh?

Thanks, Mike! That's NGC 7549. NGC 7550, the bright elliptical has some nice, subtle structure in the outer halo too. I might try pushing the faint stuff a little harder in a repro...

multiweb (Marc) · #4 01-02-2018, 07:10 PM

Superb fov in the high res. That little hooked face on is pretty cool. Lot of dust around indeed. Great star colors too.

RickS (Rick) · #5 01-02-2018, 07:17 PM

Quote:

Originally Posted by multiweb

Superb fov in the high res. That little hooked face on is pretty cool. Lot of dust around indeed. Great star colors too.

Thanks very much, Marc!

Placidus (Mike and Trish) · #6 01-02-2018, 07:24 PM

Exquisitely beautiful, Rick (and team). Everything about this image is delicious.

Even though you've got 37 hours of data, you've not made the mistake of trying to give equal weight to every photon and every pixel; you've concentrated on showing the beauty of the (very many) main players. Wonderful!

Best,
MnT

willik (Willik) · #7 01-02-2018, 08:44 PM

Very nice image lots of detail and the colour
of the stars just perfect.
Martin

RickS (Rick) · #8 01-02-2018, 09:24 PM

Quote:

Originally Posted by Placidus

Exquisitely beautiful, Rick (and team). Everything about this image is delicious.

Even though you've got 37 hours of data, you've not made the mistake of trying to give equal weight to every photon and every pixel; you've concentrated on showing the beauty of the (very many) main players. Wonderful!

Thanks, M&T! There's still time for me to abuse and misuse those photons in a repro

Quote:

Originally Posted by willik

Very nice image lots of detail and the colour
of the stars just perfect.

Thanks, Martin.

billdan (Bill) · #9 01-02-2018, 09:25 PM

That's really awesome Rick, beautiful images, and drizzled as well, must be some large sub-exposure file sizes there.

joelshort (Joel) · #10 02-02-2018, 12:42 AM

Very nice! This gets me excited for galaxy season coming up soon (in the Northern hemisphere).

RickS (Rick) · #11 02-02-2018, 08:13 AM

Quote:

Originally Posted by billdan

That's really awesome Rick, beautiful images, and drizzled as well, must be some large sub-exposure file sizes there.

Thanks, Bill. Fortunately, I have a new processing computer and it makes short work of drizzling lots of large subs!

Quote:

Originally Posted by joelshort

Very nice! This gets me excited for galaxy season coming up soon (in the Northern hemisphere).

Thanks, Joel. We're hoping to get a few more less common targets this time around.

gregbradley · #12 02-02-2018, 09:01 AM

A beautifully executed image Rick. Your trademark superlative processing and a lovely field.

Greg.

RickS (Rick) · #13 02-02-2018, 07:05 PM

Quote:

Originally Posted by gregbradley

A beautifully executed image Rick. Your trademark superlative processing and a lovely field.

Thanks, Greg!

I have done a small tweak to boost the IFN a little more: https://www.astrobin.com/full/331663/B/?nc=user

Camelopardalis (Dunk) · #14 02-02-2018, 07:41 PM

Love the tweak Rick, but there’s something wrong with the pointy stars

RickS (Rick) · #15 02-02-2018, 08:30 PM

Quote:

Originally Posted by Camelopardalis

Love the tweak Rick, but there’s something wrong with the pointy stars

Must have been a long week, Dunk. They look OK to me? Maybe tomorrow I'll figure out what you meant...

lazjen (Chris) · #16 02-02-2018, 10:44 PM

Very nicely done, ripping them out of the new machine I see.

alpal · #17 03-02-2018, 12:23 AM

Hi Rick,
nice to see some excellent results from a remote Nevada observatory.
I hope to see many more.

cheers
Allan

ozstronomer (Geoff) · #18 03-02-2018, 12:00 PM

Beautiful image Rick, second version gives the IFN that extra pop

Cheers Geoff

RickS (Rick) · #19 03-02-2018, 04:09 PM

Quote:

Originally Posted by lazjen

Very nicely done, ripping them out of the new machine I see.

Thanks, Chris. I'm spending less time surfing the interwebs while waiting for PI

Thanks for the heads up on the copyright message too.

Quote:

Originally Posted by alpal

Hi Rick,
nice to see some excellent results from a remote Nevada observatory.
I hope to see many more.

Thanks, Allan. I have plenty of data in the queue!

Quote:

Originally Posted by ozstronomer

Beautiful image Rick, second version gives the IFN that extra pop

Thanks very much, Geoff. See you at the AAQ AGM in a couple of weeks?

marc4darkskies (Marcus) · #20 04-02-2018, 12:15 PM

Beautiful Rick!

A veritable wading pool of galactic goodness!