Celestial hemisphere:  Northern  ·  Constellation: Pegasus (Peg)
Getting plate-solving status, please wait...
Einstein Cross, 



    
        

            KuriousGeorge
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Einstein Cross

Getting plate-solving status, please wait...
Einstein Cross, 



    
        

            KuriousGeorge
Powered byPixInsight

Einstein Cross

Acquisition details

Dates:
Oct. 25, 2022
Frames:
30×60(30′)
Integration:
30′
Avg. Moon age:
0.04 days
Avg. Moon phase:
0.00%

RA center: 22h40m30s.198

DEC center: +03°2129.45

Pixel scale: 0.098 arcsec/pixel

Orientation: 8.779 degrees

Field radius: 0.078 degrees

WCS transformation: thin plate spline

More info:Open 

Resolution: 4788x3148

File size: 2.0 MB

Locations: KG Observatory, Julian, CA, United States

Data source: Backyard

Description

Here's my promised second attempt at trying to resolve the Einstein Cross. My first attempt was in 2018...

https://www.astrobin.com/367242/?nc=&nce=

Now I'm able to take advantage of my planetary setup with a 2X Televue barlow and the ASI6200 CMOS camera. 

I estimated seeing at 4/5 while I captured 140 60s L subs. I then kept the best 30 with an average FWHM near 1.5".

The L subs were calibrated, aligned and average integrated in PI. I then applied HDR in PI to lower the core brightness followed by a mild MLT and a mild (100/8/5) USM in PS. 

I'm happy to finally resolve the cross structure. My next attempt will use a similar setup and process, but with more subs during great seeing. 

"The Einstein Cross (Q2237+030 or QSO 2237+0305) is a gravitationally lensed quasar that sits directly behind the center of the galaxy ZW 2237+030, called Huchra's Lens. Four images of the same distant quasar (plus one in the centre, too dim to see) appear in the middle of the foreground galaxy due to strong gravitational lensing. This system was discovered by John Huchra and coworkers in 1985, although at the time they only detected that there was a quasar behind a galaxy based on differing redshifts and did not resolve the four separate images of the quasar.

While gravitationally lensed light sources are often shaped into an Einstein ring, due to the elongated shape of the lensing galaxy and the quasar being off-centre, the images form a peculiar cross-shape instead."

Comments

Revisions

  • Einstein Cross, 



    
        

            KuriousGeorge
    Original
  • Final
    Einstein Cross, 



    
        

            KuriousGeorge
    B

B

Description: Re-processed with only 30 x 60s using the lowest FWHM L subs. Dimmer galaxy but sharper cross.

Uploaded: ...

Sky plot

Sky plot

Histogram

Einstein Cross, 



    
        

            KuriousGeorge

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