2012cg
 

Supernova in the NGC4424 Galaxy 

AstronomerTelegram:

4119 Near-infrared spectroscopy of the young SN Ia in NGC4424 E. Y. Hsiao, M. M Phillips, N. Morrell, C. Contreras (Las Campanas Observatory), G. H. Marion (Harvard,.... -- 19 May 2012; 15:05 UT 4118 No detected X-ray counterpart to the young SN Ia in NGC4424 R. Margutti, A. Soderberg (Harvard University) -- 19 May 2012; 13:36 UT

2012cg (= PSN J12271283+0925132), CBET 3111 discovered 2012/05/17.220 by Lick Observatory Supernova Search Found in NGC 4424 at R.A. = 12h27m12s.83, Decl. = +09°25'13".2 Located 17".3 east and 1".5 south of the center of NGC 4424 (Discovery image) Mag 12.1:5/27, Type Ia (References: AAVSO special notice 283, ATEL 4115, 4118, 4119, CBAT TOCP; SN 1895A) 2012cg images sub-page

A listing of Supernovae brighter than 17 Mag. can be found at this site
http://www.rochesterastronomy.org/snimages/

     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.