Have your best photos printed at Deep Sky Printing .

We use Kodak Color Metallic paper for an exquisite finish.
Online ordering. Rapid turnaround.

Custom Search

 SN2011dh

Supernova in the Whirlpool Galaxy M51 

 

Home
Up
2011dh
PTF11kly
2012AW
2012cg
2012cu
SN in NGC2554
SN in NGC1961
SN 2013df
SN 2013dy
SN2013ej
Nova2013Delph
SN2014G
SN2014J
SN2014ao
SN-2017eaw

 

 

     The eruption was first seen on May 31st 2011, by French amateur Amédée Riou who noticed a previously absent 14th-magnitude star in a  image of the M51 galaxy. He had compared the new image to a previous one take and decided that  it had to  be a supernova because of its blue color and the fact that  it was missing in previous images.

Shortly there after, others had also spotted the supernova among them the robotic Palomar Transient Factory and the Galaxy Zoo's supernova hunters.

Measurements take of the hydrogen gas ejected from SN2011dh indicates that  its traveling at astonishing speed of 17,600km per second.

     I am attempting to monitor and calculate its magnitude (dimness) over time. As you  can see by the graph below, from the time I started to monitor it on June 4th 2011  it had increased in brightness 'till June 7th when it started do decline in intensity a bit. 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.

I'd Like to thank the following for providing images for analysis:

00

Help Support this site. Check out the Google ads below!

 

eXTReMe Tracker

I use Google to serve ads when you visit my website. Google may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by Google, click HERE