Re: Arp 105, "the guitar"
@Bernhard, Kevin, Geof, and Jerry - thanks for the feedback!
Bruce W
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Re: Arp 105, "the guitar"
Very nice image of an exceedingly interesting target.? Thanks especially for the eloquent description of the components.
Jerry L. Floyd
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Re: Arp 105, "the guitar"
Bruce,
Wow, that’s a lot of galaxies. I love the reference to 'the guitar', it really does look like one.
Geof
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This image shows the central part of the Abell 1185 cluster of galaxies in Ursa Major.? The cluster is roughly 450M light-years away and contains 80+ confirmed members.? One striking component of
the cluster is the peculiar collection of distorted galaxies below center.? These were catalogued in Arp's atlas of peculiar galaxies and given the appellation of "the guitar". The object is comprised of elliptical, spiral, and tidal dwarf galaxies that are
undergoing dramatic gravitational interactions. The "neck" of the guitar represents stellar material that has been extracted from the blue dwarf galaxy at the left and the bright blue knot to the right of the elliptical galaxy is thought to be the end of that
tidal stream.? The largest elliptical galaxy in the upper left is NGC 3550 which exhibits a rare triple nucleus.? Those nuclei have very different velocities and are therefore presumed to be the result of recent mergers of at least 3 galaxies.? The image was
captured during 8 nights in May and June 2023. Image acquisition was done with a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB integration of 16 hours.
Thanks for looking,
Bruce W.
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Re: Arp 105, "the guitar"
Wonderful image of this fascinating galaxy cluster Bruce.
Clear skies,
Kevin
On July 7, 2023, at 3:07 PM, bw <bw_msg01@...> wrote: This image shows the central part of the Abell 1185 cluster of galaxies in Ursa Major.? The cluster is roughly 450M light-years away and contains 80+ confirmed members.? One striking component of the cluster is the peculiar collection of distorted galaxies below center.? These were catalogued in Arp's atlas of peculiar galaxies and given the appellation of "the guitar". The object is comprised of elliptical, spiral, and tidal dwarf galaxies that are undergoing dramatic gravitational interactions. The "neck" of the guitar represents stellar material that has been extracted from the blue dwarf galaxy at the left and the bright blue knot to the right of the elliptical galaxy is thought to be the end of that tidal stream.? The largest elliptical galaxy in the upper left is NGC 3550 which exhibits a rare triple nucleus.? Those nuclei have very different velocities and are therefore presumed to be the result of recent mergers of at least 3 galaxies.? The image was captured during 8 nights in May and June 2023. Image acquisition was done with a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB integration of 16 hours.
Thanks for looking,
Bruce W.
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Re: Arp 105, "the guitar"
Hello Bruce,
very nice details in this fascinating galaxy cluster!
best,
Bernhard
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This image shows the central part of the Abell 1185 cluster of galaxies in Ursa Major.? The cluster is roughly 450M light-years away and contains 80+ confirmed members.? One striking component of the cluster is the peculiar collection of distorted galaxies below center.? These were catalogued in Arp's atlas of peculiar galaxies and given the appellation of "the guitar". The object is comprised of elliptical, spiral, and tidal dwarf galaxies that are undergoing dramatic gravitational interactions. The "neck" of the guitar represents stellar material that has been extracted from the blue dwarf galaxy at the left and the bright blue knot to the right of the elliptical galaxy is thought to be the end of that tidal stream.? The largest elliptical galaxy in the upper left is NGC 3550 which exhibits a rare triple nucleus.? Those nuclei have very different velocities and are therefore presumed to be the result of recent mergers of at least 3 galaxies.? The image was captured during 8 nights in May and June 2023. Image acquisition was done with a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB integration of 16 hours.
Thanks for looking,
Bruce W.
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John,
I recently sold this same setup minus the Lodestar. I was able to get only $1500 with the filters on Cloudy Nights. I had gotten great use out of the camera and replaced it with a QSI6162wsg. I've always appreciated the QSI design incorporating the filter wheel and guide port. The overall quality of QSI cameras is much superior (IMHO) to some of the CMOS cameras on the market. I have a full-frame OSC from a manufacturer I won't name. I added a filter and off-axis guide port to it, while a fine camera it looks like a Rube Goldfarb machine.?
?
Loving the 6162!
Pete
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Just a thought, John,
You will have seen from my earlier response that I already have that camera and am very happy with it. But I am wondering with what camera if any you are going to replace the QSI.
Cheers,
Peter.
Approx. 55 deg N, 2 deg W (Northumberland, UK)
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On 05/07/2023 15:27, John Bartucci wrote: Apologies in advance but anyone interested in a QSI-683-wsg8 with Astrodon filters and a Lodestar 2, please check out AstroMart listing 568886 or contact me directly.
Had a response saying the -683 is worthless - held myself in check by not responding to him...
John
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Thanks, Peter. -----Ursprüngliche Nachricht----- Von: [email protected] [mailto: [email protected]] Im Auftrag von Peter Vasey Gesendet: Mittwoch, 5. Juli 2023 20:42 An: [email protected]Betreff: Re: [QSI-CCD] QSI-683wsg8 Likewise. I've had mine (also the same setup) since 2012 and it's still going strong taking excellent images. Yes, CMOS seems to be taking over in many areas, partly forced by sensor manufacturers abandoning CCD in favour of the cheaper CMOS, but that doesn't mean that CCD is now worthless! The QSI cameras in particular are robust and reliable. (Hope this doesn't tease the camera gods!) And the Hubble Space Telescope seems happy enough with its CCD sensors! I daresay if my beloved QSI 683wsg8 eventually and irreparably bites the dust, CMOS will be on the cards. But not yet! I had a brief encounter with an OSC CMOS camera, but soon reverted to Old Faithful. You'll find a description of that on my web site, or link direct here: Cheers, Peter. Approx. 55 deg N, 2 deg W (Northumberland, UK)
On 05/07/2023 16:56, Wolfgang Bernhardt wrote: What a nonsense response…
I have exactly the same setup and I am happy with it, keeping fingers
crossed.
Best
Wolfgang
*Von:*[email protected] [mailto:[email protected]] *Im Auftrag von
*John Bartucci
*Gesendet:* Mittwoch, 5. Juli 2023 16:28
*An:* [email protected]
*Betreff:* [QSI-CCD] QSI-683wsg8
Apologies in advance but anyone interested in a QSI-683-wsg8 with
Astrodon filters and a Lodestar 2, please check out AstroMart listing
568886 or contact me directly.
Had a response saying the -683 is worthless - held myself in check by
not responding to him...
John
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Likewise.
I've had mine (also the same setup) since 2012 and it's still going strong taking excellent images. Yes, CMOS seems to be taking over in many areas, partly forced by sensor manufacturers abandoning CCD in favour of the cheaper CMOS, but that doesn't mean that CCD is now worthless! The QSI cameras in particular are robust and reliable. (Hope this doesn't tease the camera gods!) And the Hubble Space Telescope seems happy enough with its CCD sensors!
I daresay if my beloved QSI 683wsg8 eventually and irreparably bites the dust, CMOS will be on the cards. But not yet! I had a brief encounter with an OSC CMOS camera, but soon reverted to Old Faithful. You'll find a description of that on my web site, or link direct here:
Cheers,
Peter.
Approx. 55 deg N, 2 deg W (Northumberland, UK)
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On 05/07/2023 16:56, Wolfgang Bernhardt wrote: What a nonsense response…
I have exactly the same setup and I am happy with it, keeping fingers crossed.
Best
Wolfgang
*Von:*[email protected] [mailto:[email protected]] *Im Auftrag von *John Bartucci
*Gesendet:* Mittwoch, 5. Juli 2023 16:28
*An:* [email protected]
*Betreff:* [QSI-CCD] QSI-683wsg8
Apologies in advance but anyone interested in a QSI-683-wsg8 with Astrodon filters and a Lodestar 2, please check out AstroMart listing 568886 or contact me directly.
Had a response saying the -683 is worthless - held myself in check by not responding to him...
John
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What a nonsense response… ? I have exactly the same setup and I am happy with it, keeping fingers crossed. ? Best Wolfgang ? Von: [email protected] [mailto:[email protected]] Im Auftrag von John Bartucci
Gesendet: Mittwoch, 5. Juli 2023 16:28
An: [email protected]
Betreff: [QSI-CCD] QSI-683wsg8 ? Apologies in advance but anyone interested in a QSI-683-wsg8 with Astrodon filters and a Lodestar 2, please check out AstroMart listing?568886 or contact me directly.?
Had a response saying the -683 is worthless - held myself in check by not responding to him...
John
|
Apologies in advance but anyone interested in a QSI-683-wsg8 with Astrodon filters and a Lodestar 2, please check out AstroMart listing?568886 or contact me directly.?
Had a response saying the -683 is worthless - held myself in check by not responding to him...
John
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Hello Bruce,
Beautiful image of this nice spiral galaxy!
best,
Bernhard
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Great image, Bruce!? Happy Fourth of July!
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Thanks Kevin and Geof.? @Geof - you got me on this one, it is a typo, the age of the bar is estimated at 500M years.? Thanks!
Bruce W.
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A beautiful image of a most interesting galaxy Bruce!
Clear skies, Kevin
From: "bw msg01" <bw_msg01@...> To: "QSI-CCD" < [email protected]> Sent: Monday, July 3, 2023 9:32:59 PM Subject: [QSI-CCD] NGC 3359 image
This is an image of NGC 3359, a barred spiral galaxy in Ursa Major located about 59M light-years away.? The striking central bar is rather curious because it is much younger than the spiral arms – 50M years vs several billion years.? It also appears to be rotating at 2-3x the rate of the surrounding spiral arms.? To the upper left of NGC 3359 is a faint blue dwarf galaxy that was first noticed in a Sloan digital sky survey image.? Dubbed the “Little Cub”, it is one of the most pristine dwarf galaxies known in our cosmic neighborhood and is thought to contain the chemical elements forged only a few minutes after the Big Bang.? It still has sufficient gas to support star formation but it is now making its first pass near NGC 3359 which is likely to lead to the stripping of its gas and its eventual demise. The image was captured during 7 nights in April and June, bracketing unexpected May monsoons in New Mexico. Image acquisition was done with a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB integration of 16.3 hours.
Thanks for looking,
Bruce W.
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That's beautiful Bruce.
I always find your supporting notes interesting, however, the linked wiki page on your websites says that the central bar is ~500M years old, whereas your covering email note say ~50M years. Was that a typo, or do you have another source showing that it is
much younger?
Regards,
Geof?
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This is an image of NGC 3359, a barred spiral galaxy in Ursa Major located about 59M light-years away.? The striking central bar is rather curious because it is much younger than the spiral arms – 50M years vs several billion years.? It also appears to
be rotating at 2-3x the rate of the surrounding spiral arms.? To the upper left of NGC 3359 is a faint blue dwarf galaxy that was first noticed in a Sloan digital sky survey image.? Dubbed the “Little Cub”, it is one of the most pristine dwarf galaxies known
in our cosmic neighborhood and is thought to contain the chemical elements forged only a few minutes after the Big Bang.? It still has sufficient gas to support star formation but it is now making its first pass near NGC 3359 which is likely to lead to the
stripping of its gas and its eventual demise. The image was captured during 7 nights in April and June, bracketing unexpected May monsoons in New Mexico. Image acquisition was done with a 12.5" PlaneWave scope and a QSI-640ws camera at f/8 for a final LRGB
integration of 16.3 hours.
Thanks for looking,
Bruce W.
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Geof Lewis