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Thread: New supernova NGC 5839

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    Default Re: New supernova NGC 5839



    Just by coincidence, when I was surfing in Cartes du Ciel through Virgo a few days ago, and jotting down anything that looked interesting to try imaging, I made note of NGC 5838 + 5846 + 5850 as a nice little group that might frame nicely in my equipment. NGC 5850 seems a particularly nice looking galaxy. I didn't bother to write NGC 5839, even though it would be included in that group, because it was so small. Looks like I need to take a stab at this later when the moon has waned. Thanks for the heads up!
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    Default Re: New supernova NGC 5839

    Would be interested in your results David. I agree, that string of galaxies southeast of 110 Virginis is interesting. I found NGC 5850 a bit faint in my orange zone with the Z10, but then again, though it has a visual mag of 11.4, its surface brightness is a bit dim at 14.2. I am sure you will have better results imaging it than I did visually observing it. Hopefully you can capture the SN in NGC 5839 as well.
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    Default Re: New supernova NGC 5839

    According to the reports on AAVSO for this SN, it appears to be holding around mag 13.8. But, the last recorded observation shown is from April 3rd. I will give it a shot next opportunity I have, which may be a few days yet due to weather.

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    Default Re: New supernova NGC 5839

    Here is what I got on the night of 12-13 April, a stack of ten exposures, 4 minutes @ ISO-800, Canon T3i on Orion 8" f/3.9 Newtonian Astrograph. Crudely processed in Deep Sky Stacker. The SN is marked with the red lines. (I hope I got it right) The peculiar NGC 5850 is at the far left.
    20150412-13 NGC5850 Annoted.jpg
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    Default Re: New supernova NGC 5839

    Wow David! Very cool!
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    Default Re: New supernova NGC 5839

    Thanks for the image David, that shows it quite well. I visually observed it this past Saturday evening from our dark site with the AD12. Here is my description of the observation:

    "At 138x I fleetingly glimpsed the SN at the eastern edge of its dim halo. At 173x it became a little more apparent, especially using averted vision. Bumping up to 227x it was seen with direct vision though it seemed to pop in and out occasionally as very subtle changes in seeing occurred. Comparing it to a nearby known star, GCS 00334-0310 at magnitude 14.66, I determined that the SN was very similar is brightness to the comparative star. My guesstimate was somewhere around 14.5 for the SN."

    I am curious why you call NGC 5850 peculiar, unless its because of the central bar and the way its prominent arms wrap to the point of almost looking like a ring around the core?
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    Default Re: New supernova NGC 5839

    Yes, that's what I mean...it looks like it has a ring, like a steering wheel in the sky. I guess that word could be confused with the "Atlas of Peculiar Galaxies", sorry!
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    Default Re: New supernova NGC 5839

    Quote Originally Posted by davidjbillo View Post
    Yes, that's what I mean...it looks like it has a ring, like a steering wheel in the sky. I guess that word could be confused with the "Atlas of Peculiar Galaxies", sorry!
    No problem, just wanted to make certain I wasn't missing something. I agree it does have the steering wheel appearance. Funny you mention Halton Arp's publication, as that was indeed the first thing that came to my mind when I saw the word peculiar.
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    Default Re: New supernova NGC 5839

    Definitely dimming, based on the observations posted at AAVSO. Based on that, I am very glad I picked it off when it was around mag 14.5.

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    Default Re: New supernova NGC 5839

    Looks like this SN has now faded significantly to around mag 16, based on the observations posted at the AAVSO site. Looks like we will have to sit and wait for the next opportunity to chase down an extragalactic SN.
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