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PTF11kly

(SN2011fe)

Supernova in the Pinwheel Galaxy M101 

 

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Some 21 million years ago, around the time that the first known bipedal ape was believed to walk upright on two legs,  a dying star in the Galaxy M101 ( Pinwheel Galaxy) exploded.

 The light from the explosion reached us around 08/24/2011 when it was discovered by   the Palomar Transient Factory  and has been designated "PTF11kly". The object, when discovered was at a magnitude of g=17.2, however as of this day (8/30/2011) it had increased to  around 13.4 mag. The object is well placed within M101 for good photometry.

The (J2000) coordinates reported for the object are
RA: 14:03:05.81 , Dec: +54:16:25.4

More information on this supernova can be found at http://www.astronomerstelegram.org/?read=3620

     I will be  monitoring and calculate its magnitude (dimness) over time. As you  can see by the graph below, from the time I started to monitor it on Aug. 30 2011  it had increased in brightness. Please note that  the smaller the magnitude number the brighter the object is.

     I will keep this graph updated by getting at least one image a night (weather permitting) till it is no longer visible.
 

     If you  are interested in how to convert ADU ( Analog Digital Units) values to  a Magnitude value, check out this link http://www.warren-wilson.edu/~physics/Contemp-Astronomy/starmag/starmag.html. You  will need the ADU and Magnitude numbers for a reference star  in the same field as the primary object as well as the ADU value of the object in question.  I use Nebulosity to get the ADU figures.

(This Page was last changed 06/17/2014)

These measurements were taken in the visible light without any color filters using an Orion SSP V2 on a SN8 at 5 minute exposure dark subtracted and flat applied.

 

These images will be updated as I get more data.

 

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