Results 1 to 6 of 6

Thread: Possible Supernova in M95

  1. #1
    Join Date
    Jan 2005
    Posts
    1,945

    Possible Supernova in M95

    I just read Phil's blog entry about a possible supernova discovered in M95. There is a video about it as well

    Just thought I would pass that on to people. I won't even try to describe it, I'll let Phil do that

    http://blogs.discovermagazine.com/ba...by-spiral-m95/

    Pete

  2. #2
    Join Date
    Mar 2004
    Location
    Ocean Shores, Wa
    Posts
    5,257
    Nice...Close is very nice!

  3. #3
    Join Date
    Sep 2006
    Posts
    1,429
    CBET 3054 contains three reports of spectra from the object.

    R. Itoh, T. Ui, and Masayuki Yamanaka, Hiroshima University, report that a low-resolution spectrum shows a broad P-Cygni profile of H-alpha, as one would expect from a type IIP supernova.

    Ulisse Munari, Istituto Nazionale di Astrofisica, Padova Astronomical Observatory, reports a featureless blue continuum, like that of a cataclysmic variable (not a SN).

    A. Siviero, L. Tomasella, A. Pastorello, S. Benetti, and U. Munari,
    Istituto Nazionale di Astrofisica, Osservatorio Astronomico di Padova; M.
    Ergon, J. Sollerman, and F. Taddia, Department of Astronomy, Stockholm
    University; and G. Barisevicius, Nordic Optical Telescope, report a spectrum which resembles that of the type IIP supernova 1999gi, perhaps 4-5 days after the explosion.

    So, it's probably a supernova. The distance modulus to M95 is about 30, so if the SN reaches a typical absolute magnitude for a type IIP -- around -18.5 -- then it would have an apparent magnitude of (-18 + 30) = 12. Should be easy to see in a CCD image, difficult to see visually.

  4. #4
    Join Date
    Mar 2012
    Posts
    12
    Nice. Don't know if I'll be able to view it with a 4" scope in light-pollution city but I may give it a try if the weather clears before 2012aw fades. Maybe my camera can pick it up.

    Is it confirmed as a Type IIP yet?

    My top bucket-list item is to view a supernova.

  5. #5
    Join Date
    Mar 2004
    Posts
    2,693
    I showed it to some groups with a 10-inch telescope at a public event over the weekend - the best chance since the M101 SN which s seen when M101 was already so far over in the west (and over the middle of town) that most people saw the SN but nobody saw M101 itself. The hot spots around it give the nucleus of M95 an interestingly curdled appearance in the eyepiece.

  6. #6
    Join Date
    Mar 2012
    Posts
    12
    If you have Stellarium and use the Historical Supernovae plugin, you can easily add SN 2012aw:

    1. Find the file supernovae.json. In Vista/7 it's in C:\Users\(your username)\AppData\Roaming\Stellarium\modules\Super novae\supernovae.json. Make a copy in case you mess it up, then open it in a text editor such as Notepad.
    2. At the bottom of the file, you'll see 3 right hand curly braces, like this:
    Code:
    			"delta": "+54d16m25.4s"
    		}
    	}
    }
    After the 1st right curly brace, add a comma, and then the text in red:
    Code:
    			"delta": "+54d16m25.4s"
                    },
    		"2012aw":
    		{
    			"type": "IIP",
    			"maxMagnitude": 12.7,
    			"peakJD": 2456008,
    			"alpha": "10h43m53.76s",
    			"delta": "11d40m17.9s"
    		}
    	}
    }
    So the end of the file should look like:

    Code:
    		"2011fe":
    		{
    			"type": "Ia",
    			"maxMagnitude": 9.9,
    			"peakJD": 2455817,
    			"alpha": "14h03m5.81s",
    			"delta": "+54d16m25.4s"
    		},
    		"2012aw":
    		{
    			"type": "IIP",
    			"maxMagnitude": 12.7,
    			"peakJD": 2456008,
    			"alpha": "10h43m53.76s",
    			"delta": "11d40m17.9s"
    		}
    	}
    }
    Save the file, then re-launch Stellarium. If it crashes, re-check the file, make sure you didn't leave out a comma or curly brace. Zoom in on M95 and there it is!

Similar Threads

  1. Supernova Sonata: Music generated by supernova properties
    By CosmicSombrero in forum Astronomy
    Replies: 7
    Last Post: 2011-May-31, 01:14 PM
  2. Supernova Alert: “Supernova Factories” Discovered
    By Fraser in forum Universe Today
    Replies: 0
    Last Post: 2008-Apr-01, 01:00 PM
  3. Replies: 5
    Last Post: 2006-Oct-08, 10:50 AM
  4. Replies: 4
    Last Post: 2006-Sep-19, 02:03 PM
  5. Supernova?
    By Tunga in forum Astronomy
    Replies: 2
    Last Post: 2004-Oct-27, 08:02 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
here
The forum is sponsored in-part by: