Supernova SN 2013df in NGC 4414: spectrum (4 July 2013)
At Virtual Telescope we observed supernova SN 2013df last 8 June 2013. At the discovery time, while it was still waiting for a spectroscopic confirmation, we tried to grab one of them, but the resulting spectrum was basically featureless. Professional, Hi-res spectra provided a classification, showing it was a type II supernova, with its typical features not so evident.
About one month later, we managed to slew our Celestron C14 robotic unit to this star, trying to secure new spectra, to see if meanwhile the object developed more evident features. Seven, 300-seconds exposures were taken, using a SA100 diffraction grating; then the frames were averaged and processed using the RSpec software created by Tom Field.
The plot above shows the results: here, the Ha emission was firmly recorded, showing this is a type II supernova, likely a peculiar type IIb (because of its initial spectrum, with not obvious features).
Support The Virtual Telescope Project!
If everyone reading this right now would donate something, our fundraiser would be done in a few days. Please, donate and receive unique, LIMITED EDITION set of images showing the stunning 19 Feb. 2019 Supermoon above Rome, images of the Tiangong 1 and International Space Station above Rome and more, specifically made for supporters like you!
donate now (you can adjust the amount later)
You can also order our 2019 Calendar, featuring our unique images of the stars above the legendary monuments of Rome!