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Thread: New supernova NGC 5839

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    Default New supernova NGC 5839



    Looks like we have a new supernova that was found on March 16th. It is located in the galaxy NGC 5839 in eastern Virgo. I have seen designations of PSN J15053007+0138024 and SNHunt281. Sky Tools lists it as mag 14.1, but it may be just a little brighter than that. However, not sure if its going to brighten significantly. Time will tell.

    Here is a link to some images and data.

    https://www.flickr.com/search/?q=snhunt281
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    Default Re: New supernova NGC 5839

    Very cool. Thanks Alan!
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    Default Re: New supernova NGC 5839

    Thanks for pointing this one out Alan. According to DSO browser the galaxy is listed at magnitude 12.7. Not sure 14.1 is within my scope's ability given the local conditions, but it is worth a shot once the moon starts rising later!
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    Default Re: New supernova NGC 5839

    From what I have read thus far, the AAVSO doesn't really plot fainter SNs on their site, therefore we may not see anything there about it. I have seen mentions of it being 13.9, which will still be tough for many. According to the below link its position is:

    RA = 15h05m30s.07; Dec = +01°38'02".4 (39" east and 3" south of the galaxy's center), which is plotted at the second link. Good luck to anyone who gives it a shot.

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    Default Re: New supernova NGC 5839

    That's cool Alan! Thanks for posting that.

    Generally, how long can a supernova be visible? I assume that its distance and speed (among many other factors) affect how long you can see it but, are they generally visible for days, weeks, months, etc.. ?
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    Default Re: New supernova NGC 5839

    Well Oliver, I can't really say in the case of this one specifically. I have read, but cannot confirm that this is a Type 1a, which have a pretty rapid rise to maximum, then quickly start the process of fading at a slower, but steady rate. Where we are in its life-span I am not certain. But if the graphs at the link I provided are close to accurate, it appears it could be at or just past maximum. But I don't have enough data to really state that with certainty. Given that it appears the AAVSO does not appear to be tracking this one because of its faintness, we may not have a profusion of accurate data showing up. I will continue to monitor what data I can find, including Sky Tools.

    At the below link are sample light curves showing the general trend of various types of supernovas. I cannot vouch for the accuracy of the curve plots, but hope it does give a general sense of how they respond.

    File:Comparative supernova type light curves.png - Wikimedia Commons
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    Default Re: New supernova NGC 5839

    Alan, thanks for the general explanation and the link! That answers the question I was trying to ask!
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    Default Re: New supernova NGC 5839

    Glad that helped. In re-reading my response I feel I need to clarify one statement I made. When I said "But if the graphs at the link I provided are close to accurate, it appears it could be at or just past maximum.", I was referring to the link I provided in the first post, not the post in which I responded to your question.

    If you go to the page I linked to in the first post (also linked below) and look at the first graph, you will see it plots the SNs magnitude against the date in Modified Julian Dates (MJD) of 57105 to 57120. If you convert that to standard calendar dates, that gives a range of 24 March to 08 April 2015, with actual data included up to 03 April 2015. So it does appear, if the data is accurate, that the SN has peaked already. I just wanted to make certain that what I intended to say was clear and not ambiguous.

    https://www.flickr.com/search/?q=snhunt281
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    Default Re: New supernova NGC 5839

    Thanks Alan, I hope it brightens, looking forward to the hunt. If the weather ever cooperates...lol
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    Default Re: New supernova NGC 5839

    Thanks Alan. I probably can't see that from my LP skies, however, we will be traveling to darker skies for camping later this month. Maybe it will brighten and we can see it then with my 6SE...
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