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Contains:  M 84, M 86, NGC 4374, NGC 4387, NGC 4402, NGC 4406, NGC 4425, NGC 4435, NGC 4438, NGC 4458, NGC 4461, NGC 4473, NGC 4477, NGC 4479, The Eyes
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Links in Markarian's Chain: M86 et al., 7 Jun 2013, 



    
        

            David Dearden
Links in Markarian's Chain: M86 et al., 7 Jun 2013
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Links in Markarian's Chain: M86 et al., 7 Jun 2013

Technical card


Dates:June 7, 2013

Frames: 17x300"

Integration: 1.4 hours

Avg. Moon age: 28.49 days

Avg. Moon phase: 1.22%


Basic astrometry details

Astrometry.net job: 126260

RA center: 12h 27' 30"

DEC center: +13° 14' 42"

Pixel scale: 6.715 arcsec/pixel

Orientation: 4.713 degrees

Field radius: 0.964 degrees


Resolution: 807x645

Locations: Mapleton Lateral Observatory, Mapleton, Utah, United States

Description

These galaxies are always pretty easy to find, and tonight was no exception; just put the Telrad at the midpoint of the line between Denebola and Vindemiatrix, and with this wide-field setup something will be in the field of view. I started this image much too late and so did not get enough data for it to look like it should, but I'm intrigued with trying to capture a good chunk of Markarian's Chain. This shot is challenging to frame so as to include as many galaxies as possible. No guiding issues at this scale with this light scope, but the trees and the Spanish Fork light pollution played havoc with the image. Chiller at 2.25 A, ~12 °C; we are approaching summer temperatures now.

Date: 7 Jun 2013 (just barely; most subs were on the 8th)
Subject: Markarian’s Chain
Scope: Orion ST80+Antares 0.5x telereducer
Filter: Baader Fringe Killer
Mount: CG-5 (Synta motors)
Guiding: 9x50 Finder/Guider + DSI Ic + PHD 1.14.2
Camera: DSI IIc (cooled at 2.25 A, 10.0 V, 12 °C)
Acquisition: Nebulosity 3.1.6
Exposure: 17 x 300 s
Stacking: Neb 3, bad pixel map, bias included, normalize first, trans+rot align, 1.5 SD stack.
Processing: StarTools 1.3 Crop; Wipe:Color & Brightness; Develop 76.88%; Contrast; HDR:Optimize; Track; Color:Bottom 2.0, Top Full, Sat 600%; Magic:Shrink 1 pix (twice); Denoise; Life:Heavy. CS6+Astronomy Tools increase star color; deep space, space NR; AstroFrame.

Comments

Author

dvdearden
David Dearden
License: None (All rights reserved)
1060
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Links in Markarian's Chain: M86 et al., 7 Jun 2013, 



    
        

            David Dearden