Low resolution spectrum

Forums Spectroscopy Bright possible supernova in NGC6946 Low resolution spectrum

Robin Leadbeater

I was able to get just 10 mins on this object with the modified ALPY 200 before the clouds rolled in last night. This is a bright target for this setup though so it was enough to get a decent low resolution spectrum (R~130).  Here is my spectrum overlaid on the confirming spectrum from 14th May posted on TNS.

The Supernova identification program SNID confirms from my spectrum it is a type IIP near maximum light. There have been some significant changes in the spectrum over the past 3 days which is expected. 

 The blue shifted absorption component of the H alpha P Cygni profile is clear now in my spectrum and can be used to estimate the explosion velocity (~11600km/s)