Go Back   IceInSpace > Images > Deep Space

Reply
 
Thread Tools Rate Thread
  #1  
Old 31-07-2021, 10:06 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,704
I got me self a Quasar (Q2237-0607) mag 18.3 with Redshift z=4.55

I first read about the discovery of Quasars, these enigmatic, distant, energetic objects, as a schoolboy. I never imagined that one day, I would be able to record the stellar like presence of one through a small telescope in my back garden. After a “why not try for a Quasar” PM from Beren, I gave it a go – thanks Stuart!

In SkyTools 4 Imaging, using the Database Power Search Tool for Extragalactic Objects, I found a list of Quasars, filtered by date and my location, with a Redshift z >4, visible in August.

The 1st entry (Q2237-0607 in Aquarius) in the list looked like a good candidate at mag 18.3 so I slewed to the location and grabbed a series of 40x30 sec images and was pleasantly surprised to find a good match.

I also found an interesting APOD that showed a “Redshift Lookup Table for our Universe” which itself linked to the original Technical Paper which can be viewed as a PDF. It is described as a “Paper-and-pencil cosmological calculator” for when you don’t have an Internet Connection.

SkyTools 4 Imaging Data (sub-set)
  • Q2237-0607
  • Quasar
  • R.A. 22h39m53.6s Dec.: -05°52'19" (2000) in Aquarius
  • Magnitude: 18.30 R
  • Size: stellar
  • Redshift (z): 4.55
  • Light Time: 12.0 Gyr
  • Apparent Data for 2021 Jul 30 GMT+10 at Brisbane, Australia:
  • Apparent RA: 22h41m01.1s, Apparent Dec: -05°45'33"

LINKS:
APOD
https://apod.nasa.gov/apod/ap130408.html

Paper-and-pencil cosmological calculator PDF
https://arxiv.org/abs/1303.5961

Cheers

Dennis

Tak Mewlon 210 F11.5 with Tak x0.8 RF
ASI 290 MM Pro
40x30 secs
Attached Thumbnails
Click for full-size image (1 Quasar BG ID Text.jpg)
179.0 KB107 views
Click for full-size image (2 Quasar BG Inverted.jpg)
173.8 KB105 views
Click for full-size image (3 Quasar BG Inverted ST4 Overlay.jpg)
177.5 KB81 views
Click for full-size image (ST4 Database Power Search Panel Crop 1280.jpg)
180.0 KB86 views
Click for full-size image (ST4 Quasar Imaging List.jpg)
160.1 KB76 views
Reply With Quote
  #2  
Old 31-07-2021, 10:32 AM
RobF's Avatar
RobF (Rob)
Mostly harmless...

RobF is offline
 
Join Date: Jul 2008
Location: Brisbane, Australia
Posts: 5,716
Holy c#r@ Dennis!
That's amazing - again!
Reply With Quote
  #3  
Old 31-07-2021, 03:56 PM
beren
Registered User

beren is offline
 
Join Date: Oct 2004
Posts: 2,810
Awesome Dennis, great work capturing truly distant light .


Little table to put Z=4.55 into perspective



z Time the light has been traveling. Distance to the object now

0.0000715 1 million years 1 million light years
0.10 1.286 billion years 1.349 billion light years
0.25 2.916 billion years 3.260 billion light years
0.5 5.019 billion years 5.936 billion light years
1 7.731 billion years 10.147 billion light years
2 10.324 billion years 15.424 billion light years
3 11.476 billion years 18.594 billion light years
4 12.094 billion years 20.745 billion light years
5 12.469 billion years 22.322 billion light years
6 12.716 billion years 23.542 billion light years
7 12.888 billion years 24.521 billion light years
8 13.014 billion years 25.329 billion light years
9 13.110 billion years 26.011 billion light years
10 13.184 billion years 26.596 billion light years
Reply With Quote
  #4  
Old 31-07-2021, 05:17 PM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,704
Thanks Rob and Stuart, the z=4.55 Redhsift explain why the red photons weren't getting through the Red Filter in my FW, they were simply too tired after travelling all that distance.

Cheers

Dennis
Reply With Quote
  #5  
Old 31-07-2021, 05:46 PM
peter_4059's Avatar
peter_4059 (Peter)
Big Scopes are Cool

peter_4059 is offline
 
Join Date: Jun 2007
Location: SE Tasmania
Posts: 4,532
Amazing Dennis. You always come up with something new and extraordinary. Hard to comprehend capturing something that distant with relatively modest gear in backyard Brisbane. Thanks for sharing.
Reply With Quote
  #6  
Old 31-07-2021, 10:47 PM
h0ughy's Avatar
h0ughy (David)
Moderator

h0ughy is offline
 
Join Date: Apr 2005
Location: NEWCASTLE NSW Australia
Posts: 33,156
Wow that's so typically DENNIS

Awe-inspiring and simply deserves applause from the cheap seats.
Reply With Quote
  #7  
Old 01-08-2021, 12:43 PM
astroron's Avatar
astroron (Ron)
Supernova Searcher

astroron is offline
 
Join Date: Mar 2005
Location: Cambroon Queensland Australia
Posts: 9,313
Brilliant as usual Dennis
But if you can do that with such a "little Scope"
it should be a cinch in my 16" Lol
Cheers
Reply With Quote
  #8  
Old 01-08-2021, 01:20 PM
ChrisM's Avatar
ChrisM
Sandy Ridge Observatory

ChrisM is offline
 
Join Date: Mar 2008
Location: Gippsland, VIC
Posts: 763
Well done Dennis - that's a heck of a distance. Image how bright it must be to see from this far away!

The only quasar I've seen was 3C 273 at just 1/3 of that distance, plus it's mag 12.9 so readily captured via a single short exposure.

Cheers, Chris
Reply With Quote
  #9  
Old 01-08-2021, 02:10 PM
AnakChan (Sean)
Registered User

AnakChan is offline
 
Join Date: Sep 2014
Location: Perth
Posts: 371
Well done Dennis! Beren told me about your capture and lead me to this thread. Great effort there!
Reply With Quote
  #10  
Old 02-08-2021, 08:37 AM
Dennis
Dazzled by the Cosmos.

Dennis is offline
 
Join Date: May 2005
Location: Brisbane
Posts: 11,704
BR 2248-1242 and BRI J0113-2803

I managed to track down another couple of Quasars:

BR 2248-1242
  • R.A. 22h51m18.1s Dec.: -12°27'03" (2000) in Aquarius
  • Magnitude: 18.50 R
  • Redshift (z): 4.15
  • Light Time: 12.0 Gyr

BRI J0113-2803
  • R.A. 01h13m44.4s Dec.: -28°03'18" (2000) in Sculptor
  • Magnitude: 18.70 R
  • Redshift (z): 4.30
  • Light Time: 12.0 Gyr

There is another one on the BRI J0113 image that “got away”; Q0111-0028 which at mag 18.7 “should” have been captured at the top-middle of frame as shown in the SkyTools 4 Imaging Overlay, but it did not register.

If I get another opportunity, I might try for Q0111-0028 again but using an IR642 Filter.

Q0111-0028
  • R.A. 01h13m52.5s Dec.: -28°14'08" (2000) in Sculptor
  • Magnitude: 18.70
  • Redshift (z): 4.30
  • Light Time: 12.0 Gyr

Tak Mewlon 210 F11.5 with Tak x0.8 RF.
ASI 294 MM Pro camera

Cheers

Dennis
Attached Thumbnails
Click for full-size image (Quasar02-BR-2248--1242-DBE-Crop-1280.jpg)
197.8 KB57 views
Click for full-size image (Quasar02-BR-2248--1242-DBE-Crop-1280-Text.jpg)
199.4 KB52 views
Click for full-size image (QUASAR-BRI-J1103-2803-DBE-Crop-1280.jpg)
197.1 KB57 views
Click for full-size image (QUASAR-BRI-J1103-2803-DBE-Crop-1280-Tex.jpg)
167.6 KB39 views
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 03:10 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement